{"id":1283,"date":"2026-09-10T07:48:14","date_gmt":"2026-09-10T07:48:14","guid":{"rendered":"https:\/\/shenoyhospitals.com\/blog\/?p=1283"},"modified":"2026-09-10T08:00:20","modified_gmt":"2026-09-10T08:00:20","slug":"pulmonary-function-test-what-it-measures","status":"publish","type":"post","link":"https:\/\/shenoyhospitals.com\/blog\/pulmonary-function-test-what-it-measures\/","title":{"rendered":"Pulmonary Function Test: What It Actually Measures"},"content":{"rendered":"\n[et_pb_section fb_built=&#8221;1&#8243; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; background_color=&#8221;#a2d4e9&#8243; global_colors_info=&#8221;{}&#8221;][et_pb_row custom_padding_last_edited=&#8221;on|phone&#8221; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; custom_padding=&#8221;||27px|||&#8221; custom_padding_tablet=&#8221;&#8221; custom_padding_phone=&#8221;0px||0px||true|false&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; custom_padding=&#8221;10px||||false|false&#8221; border_color_right=&#8221;#FFFFFF&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_text _builder_version=&#8221;4.27.8&#8243; _module_preset=&#8221;default&#8221; hover_enabled=&#8221;0&#8243; global_colors_info=&#8221;{}&#8221; sticky_enabled=&#8221;0&#8243;]<p><a href=\"https:\/\/shenoyhospitals.com\/\">Home<\/a> \/ <a href=\"https:\/\/shenoyhospitals.com\/blog\/\">Blog<\/a> \/ Pulmonary Function Test<\/p>[\/et_pb_text][et_pb_text _builder_version=&#8221;4.27.8&#8243; _module_preset=&#8221;default&#8221; header_font=&#8221;|700|||||||&#8221; header_text_color=&#8221;#e31c61&#8243; hover_enabled=&#8221;0&#8243; header_font_size_tablet=&#8221;32px&#8221; header_font_size_phone=&#8221;20px&#8221; header_font_size_last_edited=&#8221;on|phone&#8221; header_line_height_tablet=&#8221;&#8221; header_line_height_phone=&#8221;1.4em&#8221; header_line_height_last_edited=&#8221;on|phone&#8221; global_colors_info=&#8221;{}&#8221; sticky_enabled=&#8221;0&#8243;]<div class=\"qMYqUG_convSearchResultHighlightRoot\">\n<div class=\"\" data-turn-id-container=\"request-WEB:ce6c7d11-b7f7-4be4-b44f-ab59aab7fb38-2\" data-is-intersecting=\"true\">\n<div class=\"relative w-full overflow-visible\">\n<section class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [&amp;:has([data-writing-block])&gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-WEB:ce6c7d11-b7f7-4be4-b44f-ab59aab7fb38-2\" data-turn-id-container=\"request-WEB:ce6c7d11-b7f7-4be4-b44f-ab59aab7fb38-2\" data-testid=\"conversation-turn-2\" data-scroll-anchor=\"false\" data-turn=\"assistant\">\n<div class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\">\n<div class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\">\n<div class=\"flex max-w-full flex-col gap-4 grow\">\n<div data-message-author-role=\"assistant\" data-message-id=\"75ea3075-4ce7-4b20-8bf5-5050f9674d63\" dir=\"auto\" data-message-model-slug=\"gpt-5-5\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+&amp;]:mt-1\" data-turn-start-message=\"true\" tabindex=\"0\">\n<div class=\"flex w-full flex-col gap-1 empty:hidden\">\n<div class=\"markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling\">\n<h1><b>Pulmonary Function Test: What It Actually Measures<\/b><\/h1>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<\/div>\n<\/div>\n<\/div>[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=&#8221;1&#8243; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; background_color=&#8221;#FFFFFF&#8221; custom_padding=&#8221;0px||||false|false&#8221; locked=&#8221;off&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_row column_structure=&#8221;3_4,1_4&#8243; use_custom_gutter=&#8221;on&#8221; gutter_width=&#8221;2&#8243; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; width_tablet=&#8221;100%&#8221; width_phone=&#8221;80%&#8221; width_last_edited=&#8221;on|phone&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;3_4&#8243; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; sticky_limit_bottom=&#8221;section&#8221; sticky_position_tablet=&#8221;top&#8221; sticky_position_phone=&#8221;none&#8221; sticky_position_last_edited=&#8221;off|desktop&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_image src=&#8221;https:\/\/shenoyhospitals.com\/blog\/wp-content\/uploads\/2026\/08\/What-Does-a-Pulmonary-Function-Test-Actually-Measure.webp&#8221; alt=&#8221;Pulmonary Function Test&#8221; title_text=&#8221;Pulmonary Function Test&#8221; force_fullwidth=&#8221;on&#8221; _builder_version=&#8221;4.27.8&#8243; _module_preset=&#8221;default&#8221; hover_enabled=&#8221;0&#8243; global_colors_info=&#8221;{}&#8221; sticky_enabled=&#8221;0&#8243;][\/et_pb_image][et_pb_text module_id=&#8221;Overview&#8221; _builder_version=&#8221;4.27.8&#8243; _module_preset=&#8221;default&#8221; text_text_color=&#8221;#000000&#8243; text_font_size=&#8221;16px&#8221; text_line_height=&#8221;1.6em&#8221; custom_margin=&#8221;||20px||false|false&#8221; hover_enabled=&#8221;0&#8243; global_colors_info=&#8221;{}&#8221; sticky_enabled=&#8221;0&#8243;]<p><span style=\"font-weight: 400;\">If you&#8217;ve been told to get a <\/span><b>pulmonary function test<\/b><span style=\"font-weight: 400;\"> and you&#8217;re not sure what it actually checks, you&#8217;re not alone: most patients walk in only knowing they&#8217;ll &#8220;breathe into a machine.&#8221;\u00a0<\/span><\/p>\n<p><b>In simple terms, this test measures how much air your lungs can hold, how fast you can move that air in and out, and how well oxygen passes into your bloodstream.<\/b><span style=\"font-weight: 400;\">\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">For anyone searching for a<\/span><a href=\"https:\/\/shenoyhospitals.com\/pulmonology-treatment-in-secunderabad.php\"> <span style=\"font-weight: 400;\">pulmonary function test in Secunderabad<\/span><\/a><span style=\"font-weight: 400;\">, this guide will walk you through exactly what happens and what your results mean.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">At <\/span><b>Shenoy Hospitals, Secunderabad<\/b><span style=\"font-weight: 400;\">, our pulmonology team performs this test daily for patients dealing with breathlessness, cough, or known lung conditions.<\/span><\/p>[\/et_pb_text][et_pb_text module_id=&#8221;Overview&#8221; _builder_version=&#8221;4.27.8&#8243; _module_preset=&#8221;default&#8221; text_text_color=&#8221;#000000&#8243; text_font_size=&#8221;16px&#8221; text_line_height=&#8221;1.6em&#8221; custom_margin=&#8221;||20px||false|false&#8221; hover_enabled=&#8221;0&#8243; global_colors_info=&#8221;{}&#8221; sticky_enabled=&#8221;0&#8243;]<p><b>Key Takeaways<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">A PFT checks lung volume, airflow speed, and your lung capacity.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The test is painless, non-invasive, and usually takes under 30 minutes.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Results help distinguish between obstructive conditions (like asthma) and restrictive ones (like pulmonary fibrosis).<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Preparation, like avoiding smoking and heavy meals beforehand, affects accuracy.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Results guide real treatment decisions; they&#8217;re not just numbers on a page.<\/span><\/li>\n<\/ul>[\/et_pb_text][et_pb_code _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; custom_padding=&#8221;||30px||false|false&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_section global_module=\"761\"][\/et_pb_section][\/et_pb_code][et_pb_text module_id=&#8221;one&#8221; _builder_version=&#8221;4.27.8&#8243; _module_preset=&#8221;default&#8221; text_text_color=&#8221;#000000&#8243; text_font_size=&#8221;16px&#8221; text_line_height=&#8221;1.8em&#8221; header_font=&#8221;|700|||||||&#8221; header_4_font=&#8221;|700|||||||&#8221; header_4_text_color=&#8221;#e31c61&#8243; header_4_font_size=&#8221;22px&#8221; header_4_line_height=&#8221;1.3em&#8221; custom_margin=&#8221;||30px||false|false&#8221; custom_padding=&#8221;||0px|||&#8221; hover_enabled=&#8221;0&#8243; global_colors_info=&#8221;{}&#8221; sticky_enabled=&#8221;0&#8243;]<blockquote>\n<h2><b>What Exactly Is a Pulmonary Function Test?<\/b><\/h2>\n<\/blockquote>\n<p><span style=\"font-weight: 400;\">A pulmonary function test, or PFT, is a group of breathing tests that show how well your lungs are working \u2014 not just whether something is wrong, but how severe it is, a definition also used by<\/span><a href=\"https:\/\/medlineplus.gov\/ency\/article\/003853.htm\"> <span style=\"font-weight: 400;\">MedlinePlus, the U.S. National Library of Medicine&#8217;s pulmonary function test resource<\/span><\/a><span style=\"font-weight: 400;\">.\u00a0<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>The Three Core Measurements<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Most complete PFTs combine <\/span><b>spirometry<\/b><span style=\"font-weight: 400;\"> (measuring airflow speed), and a <\/span><b>gas diffusion test<\/b><span style=\"font-weight: 400;\"> like DICO (measuring how well oxygen crosses into your blood), body plethysmography and there are advanced tests like impulse oscillometry\u00a0<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Why It&#8217;s More Than &#8220;One Test&#8221;<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Patients are often surprised that &#8220;PFT&#8221; isn&#8217;t a single procedure. It&#8217;s a battery of related tests, and your doctor may order whichever is required depending on your symptoms.<\/span><\/p>\n<blockquote>\n<h2><b>What Conditions Make Doctors Recommend This Test?<\/b><\/h2>\n<\/blockquote>\n<p><b>Doctors typically order a PFT when there&#8217;s unexplained breathlessness, chronic cough, or a known risk factor for lung disease.<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Common Triggers for Testing<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Long-term smokers, people with occupational dust or chemical exposure, and those with a family history of lung disease are frequently advised to get baseline testing even before symptoms appear.<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Monitoring Existing Conditions<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">For patients already diagnosed with <\/span><b>asthma<\/b><span style=\"font-weight: 400;\">, <\/span><b>COPD<\/b><span style=\"font-weight: 400;\">, or <\/span><b>pulmonary fibrosis<\/b><span style=\"font-weight: 400;\">, repeat PFTs track whether the disease is stable, improving, or worsening over time.<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Pre-Surgical Screening<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Before certain surgeries, especially chest or upper abdominal procedures, doctors use PFTs to confirm the lungs can safely tolerate anesthesia and recovery.<\/span><\/p>\n<blockquote>\n<h2><b>When Should You Get a PFT, and Can Results Reveal Serious Disease?<\/b><\/h2>\n<\/blockquote>\n<p><b>A PFT should be considered whenever breathlessness, wheezing, or persistent cough interferes with daily activity, and yes, results can reveal serious underlying disease.<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Early Warning Signs Patients Often Ignore<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Getting winded climbing stairs you used to manage easily, or needing to pause mid-sentence to catch your breath, are subtle signs worth testing rather than dismissing as &#8220;getting older.&#8221;<\/span><\/p>[\/et_pb_text][et_pb_text module_id=&#8221;one&#8221; _builder_version=&#8221;4.27.8&#8243; _module_preset=&#8221;default&#8221; text_text_color=&#8221;#000000&#8243; text_font_size=&#8221;16px&#8221; text_line_height=&#8221;1.8em&#8221; header_font=&#8221;|700|||||||&#8221; header_4_font=&#8221;|700|||||||&#8221; header_4_text_color=&#8221;#e31c61&#8243; header_4_font_size=&#8221;22px&#8221; custom_margin=&#8221;||30px||false|false&#8221; hover_enabled=&#8221;0&#8243; global_colors_info=&#8221;{}&#8221; sticky_enabled=&#8221;0&#8243;]<p><span style=\"font-weight: 400;\">Recognize these signs in yourself? Don&#8217;t wait for them to get worse before finding out what&#8217;s behind them. <\/span><a href=\"https:\/\/shenoyhospitals.com\/book-appointment.php\"><b>Book a Pulmonary Function Test<\/b><\/a><span style=\"font-weight: 400;\"> or <\/span><a href=\"tel:+917337277787\"><b>Call Now<\/b> <\/a><span style=\"font-weight: 400;\">to get seen by our <\/span><b>Department of Pulmonology at Shenoy Hospitals, Secunderabad<\/b><span style=\"font-weight: 400;\">.\u00a0<\/span><\/p>[\/et_pb_text][et_pb_text module_id=&#8221;one&#8221; _builder_version=&#8221;4.27.8&#8243; _module_preset=&#8221;default&#8221; text_text_color=&#8221;#000000&#8243; text_font_size=&#8221;16px&#8221; text_line_height=&#8221;1.8em&#8221; header_font=&#8221;|700|||||||&#8221; header_4_font=&#8221;|700|||||||&#8221; header_4_text_color=&#8221;#e31c61&#8243; header_4_font_size=&#8221;22px&#8221; custom_margin=&#8221;||30px||false|false&#8221; hover_enabled=&#8221;0&#8243; global_colors_info=&#8221;{}&#8221; sticky_enabled=&#8221;0&#8243;]<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>What Severe Results Can Indicate<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Significantly reduced lung volumes or poor gas exchange can point toward conditions like advanced COPD, interstitial lung disease, or, in some cases, early signs of lung cancer affecting airway function. This is why abnormal results are always followed by further evaluation, not alarm.<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Why Early Testing Matters<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Catching a decline in lung function early gives far more treatment options than waiting until breathlessness becomes constant.<\/span><\/p>[\/et_pb_text][et_pb_blurb title=&#8221;Get Expert Medical Care at Shenoy Hospitals&#8221; icon_placement=&#8221;left&#8221; content_max_width=&#8221;100%&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; header_font=&#8221;|700|||||||&#8221; header_text_color=&#8221;#ffffff&#8221; header_font_size=&#8221;25px&#8221; header_line_height=&#8221;1.5em&#8221; use_background_color_gradient=&#8221;on&#8221; background_color_gradient_direction=&#8221;106deg&#8221; background_color_gradient_stops=&#8221;rgba(22,119,188,0.53) 65%|rgba(227,28,97,0.14) 100%&#8221; background_color_gradient_overlays_image=&#8221;on&#8221; background_image=&#8221;https:\/\/shenoyhospitals.com\/blog\/wp-content\/uploads\/2026\/03\/thank-u.webp&#8221; text_orientation=&#8221;center&#8221; width=&#8221;100%&#8221; custom_padding=&#8221;40px|20px|40px|20px|false|true&#8221; header_font_size_tablet=&#8221;25px&#8221; header_font_size_phone=&#8221;16px&#8221; header_font_size_last_edited=&#8221;on|phone&#8221; border_radii=&#8221;on|10px|10px|10px|10px&#8221; saved_tabs=&#8221;all&#8221; locked=&#8221;off&#8221; global_colors_info=&#8221;{}&#8221;]<div id=\"btn-inline\"><a href=\"tel:7337277787\"><button class=\"call-btn\"> +91 7337277787<\/button><\/a><br \/><a href=\"https:\/\/wa.me\/917337277787\"><button class=\"wp-btn\"> Whatsapp<\/button><\/a><\/div>[\/et_pb_blurb][et_pb_text module_id=&#8221;one&#8221; _builder_version=&#8221;4.27.8&#8243; _module_preset=&#8221;default&#8221; text_text_color=&#8221;#000000&#8243; text_font_size=&#8221;16px&#8221; text_line_height=&#8221;1.8em&#8221; header_font=&#8221;|700|||||||&#8221; header_4_font=&#8221;|700|||||||&#8221; header_4_text_color=&#8221;#e31c61&#8243; header_4_font_size=&#8221;22px&#8221; custom_margin=&#8221;||30px||false|false&#8221; hover_enabled=&#8221;0&#8243; global_colors_info=&#8221;{}&#8221; sticky_enabled=&#8221;0&#8243;]<blockquote>\n<h2><b>How Is a Pulmonary Function Test Actually Performed?<\/b><\/h2>\n<\/blockquote>[\/et_pb_text][et_pb_text module_id=&#8221;one&#8221; _builder_version=&#8221;4.27.8&#8243; _module_preset=&#8221;default&#8221; text_text_color=&#8221;#000000&#8243; text_font_size=&#8221;16px&#8221; text_line_height=&#8221;1.8em&#8221; header_font=&#8221;|700|||||||&#8221; header_4_font=&#8221;|700|||||||&#8221; header_4_text_color=&#8221;#e31c61&#8243; header_4_font_size=&#8221;22px&#8221; custom_margin=&#8221;||30px||false|false&#8221; hover_enabled=&#8221;0&#8243; global_colors_info=&#8221;{}&#8221; sticky_enabled=&#8221;0&#8243;]<p><b>The test involves breathing into a mouthpiece connected to a machine that records airflow and volume; it is painless and non-invasive.<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>The Spirometry Step<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">You&#8217;ll be asked to take the deepest breath possible, then blow out as hard and fast as you can, almost like blowing out birthday candles. This is repeated a few times for consistency.<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>The Bronchodilator Step<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">In many cases, you&#8217;ll inhale a <\/span><b>bronchodilator<\/b><span style=\"font-weight: 400;\"> (a medicine that opens the airways) and repeat the test. Comparing before-and-after results tells doctors whether airway narrowing is reversible, which is key in diagnosing asthma versus COPD.<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Preparing Beforehand<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Avoiding a heavy meal, skipping smoking for several hours prior, and following your doctor&#8217;s instructions about temporarily pausing inhalers all directly affect how accurate your results will be.<\/span><\/p>[\/et_pb_text][et_pb_text module_id=&#8221;one&#8221; _builder_version=&#8221;4.27.8&#8243; _module_preset=&#8221;default&#8221; text_text_color=&#8221;#000000&#8243; text_font_size=&#8221;16px&#8221; text_line_height=&#8221;1.8em&#8221; header_font=&#8221;|700|||||||&#8221; header_4_font=&#8221;|700|||||||&#8221; header_4_text_color=&#8221;#e31c61&#8243; header_4_font_size=&#8221;22px&#8221; custom_margin=&#8221;||21px||false|false&#8221; hover_enabled=&#8221;0&#8243; global_colors_info=&#8221;{}&#8221; sticky_enabled=&#8221;0&#8243;]<blockquote>\n<h2><b>What Do Your PFT Results Actually Tell You?<\/b><\/h2>\n<\/blockquote>\n<p><b>Your results are compared to predicted &#8220;normal&#8221; values based on your age, height, sex, and ethnicity, rather than a single fixed number for everyone.<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Understanding FEV1 and FVC<\/b><\/li>\n<\/ul>\n<p><b>FEV1<\/b><span style=\"font-weight: 400;\"> measures how much air you can force out in one second, while <\/span><b>FVC<\/b><span style=\"font-weight: 400;\"> measures the total air you can exhale. The ratio between them helps identify whether your airways are narrowed (obstructive pattern) or your lung expansion is limited (restrictive pattern).<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>What the DLCO Number Reveals<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">This measurement reflects how efficiently oxygen crosses from your lungs into your bloodstream, and it&#8217;s especially useful for detecting diseases affecting lung tissue itself, rather than just the airways.<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Why One Test Rarely Gives the Full Answer<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">A single abnormal number rarely confirms a diagnosis alone: your doctor interprets the entire pattern together with your symptoms and history.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">If you&#8217;ve noticed unexplained breathlessness or been advised to get your lung function checked, our <\/span><a href=\"https:\/\/maps.app.goo.gl\/G82F3NZWUKTU3aUF9\"><b>Department of Pulmonology at Shenoy Hospitals, Secunderabad<\/b><\/a><span style=\"font-weight: 400;\"> offers complete pulmonary function testing with same-day interpretation, so you leave with answers, not just a report.\u00a0<\/span><\/p>\n<blockquote>\n<h2><b>What Happens After an Abnormal Result?<\/b><\/h2>\n<\/blockquote>\n<p><b>An abnormal PFT result leads to further evaluation, not immediate worry. It&#8217;s a starting point for diagnosis, not a diagnosis itself.<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Follow-Up Imaging and Tests<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Depending on the pattern found, your doctor may recommend a chest X-ray, CT scan, or blood tests to pinpoint the exact cause.<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Building a Treatment Plan<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Results directly shape treatment. For example, confirming reversible airway narrowing supports an asthma diagnosis and guides which inhaler therapy will help most.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">If you&#8217;ve noticed unexplained breathlessness or been advised to get your lung function checked, our <\/span><b>Department of Pulmonology at <\/b><a href=\"https:\/\/shenoyhospitals.com\/\"><b>Shenoy Hospitals, Secunderabad<\/b><\/a><b>,<\/b><span style=\"font-weight: 400;\"> offers complete pulmonary function testing with same-day interpretation, so you leave with answers, not just a report. Our respiratory specialists guide you through every result in plain language.<\/span><\/p>\n<blockquote>\n<h2><b>How Does Breathlessness Affect Daily Life Before Diagnosis?<\/b><\/h2>\n<\/blockquote>\n<p><b>Unexplained breathlessness often affects confidence and daily routine long before a diagnosis is made.<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>The Quiet Adjustment Pattern<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Many patients unconsciously start avoiding stairs, slowing their pace, or skipping activities without realizing how much they&#8217;ve scaled back, until testing puts a name to what&#8217;s happening.<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>The Relief of a Clear Answer<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Even when results show a chronic condition, most patients describe genuine relief in finally understanding what&#8217;s causing their symptoms, rather than continuing to guess.<\/span><\/p>\n<blockquote>\n<h2><b>Can You Improve Your Lung Function After Testing?<\/b><\/h2>\n<\/blockquote>\n<p><b>Yes, depending on the cause, lung function can often be stabilized or improved with the right treatment and lifestyle changes.<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Medical Management<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Inhaled medications, pulmonary rehabilitation programs, and, when appropriate, oxygen therapy can meaningfully improve day-to-day breathing capacity.<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Lifestyle Steps That Help<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Quitting smoking, staying current with respiratory vaccinations, and gradually building exercise tolerance under medical guidance all support better long-term lung health.<\/span><\/p>\n<blockquote>\n<h2><b>Final Thoughts<\/b><\/h2>\n<\/blockquote>\n<p><span style=\"font-weight: 400;\">A pulmonary function test can feel intimidating simply because it&#8217;s unfamiliar, but it&#8217;s one of the most useful, low-risk tools we have for understanding how your lungs are truly performing. Whether your results come back normal or reveal something that needs attention, you&#8217;ll walk away with clarity instead of uncertainty. And with the right follow-up care, most lung conditions identified through PFTs can be managed effectively.<\/span><\/p>\n<blockquote>\n<h2><b>FAQs<\/b><\/h2>\n<\/blockquote>\n<p><b>Is a pulmonary function test painful?<\/b><b><br \/><\/b><span style=\"font-weight: 400;\"> No, it involves only breathing through a mouthpiece and causes no pain, though some people feel briefly lightheaded from the forceful breathing.<\/span><\/p>\n<p><b>How long does a PFT take?<\/b><b><br \/><\/b><span style=\"font-weight: 400;\"> Most complete pulmonary function tests take between 30 and 45 minutes, including preparation and repeat measurements.<\/span><\/p>\n<p><b>Can I eat before a pulmonary function test?<\/b><b><br \/><\/b><span style=\"font-weight: 400;\"> You should avoid a heavy meal shortly before the test, as a full stomach can make deep breathing more difficult.<\/span><\/p>\n<p><b>Do I need to stop my inhaler before the test?<\/b><b><br \/><\/b><span style=\"font-weight: 400;\"> Your doctor may ask you to pause certain inhalers for several hours beforehand, since this affects how the reversibility portion of the test is interpreted.<\/span><\/p>\n<p><b>Can a PFT detect lung cancer directly?<\/b><b><br \/><\/b><span style=\"font-weight: 400;\"> Not directly, but abnormal results affecting airflow or gas exchange can prompt further imaging that may lead to a cancer diagnosis.<\/span><\/p>\n<p><b>Is the PFT machine the same for adults and children?<\/b><b><br \/><\/b><span style=\"font-weight: 400;\"> Similar equipment is used, though the technique is adapted and results are compared against different reference ranges for children.<\/span><\/p>\n<p><b>How often should someone with asthma repeat this test?<\/b><b><br \/><\/b><span style=\"font-weight: 400;\"> This depends on how well-controlled your asthma is, but many patients repeat testing every six to twelve months or after any major symptom change.<\/span><\/p>\n<p><b>Can anxiety affect PFT results?<\/b><b><br \/><\/b><span style=\"font-weight: 400;\"> Yes, anxiety can cause shallow or irregular breathing during the test, so staying calm and following instructions carefully improves accuracy.<\/span><\/p>\n<p><b>Will I get my results the same day?<\/b><b><br \/><\/b><span style=\"font-weight: 400;\"> Many pulmonary function tests can be interpreted the same day, though a formal written report may take a little longer depending on the facility.<\/span><\/p>\n<p><b>Can lung function improve on its own without treatment?<\/b><b><br \/><\/b><span style=\"font-weight: 400;\"> Some causes, like temporary infections, resolve naturally, but chronic conditions typically need ongoing medical management to maintain or improve lung function.<\/span><\/p>[\/et_pb_text][et_pb_text module_id=&#8221;one&#8221; _builder_version=&#8221;4.27.8&#8243; _module_preset=&#8221;default&#8221; text_text_color=&#8221;#000000&#8243; text_font_size=&#8221;16px&#8221; text_line_height=&#8221;1.8em&#8221; header_font=&#8221;|700|||||||&#8221; header_4_font=&#8221;|700|||||||&#8221; header_4_text_color=&#8221;#e31c61&#8243; header_4_font_size=&#8221;22px&#8221; custom_margin=&#8221;||21px||false|false&#8221; hover_enabled=&#8221;0&#8243; global_colors_info=&#8221;{}&#8221; sticky_enabled=&#8221;0&#8243;]<p><i><span style=\"font-weight: 400;\"><strong>Medical Disclaimer:<\/strong><br \/><\/span><\/i><\/p>\n<p><em>Content regarding Pulmonary Function Tests (PFTs), spirometry, and respiratory diagnostic measurements is for educational purposes only and not a substitute for clinical medical advice. Always consult a qualified pulmonologist for accurate test interpretation, preparation guidelines, and personalized lung health management.<\/em><\/p>\n<p><i><span style=\"font-weight: 400;\">\u00a0<\/span><\/i><\/p>[\/et_pb_text][\/et_pb_column][et_pb_column type=&#8221;1_4&#8243; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; sticky_limit_bottom=&#8221;section&#8221; sticky_position_tablet=&#8221;top&#8221; sticky_position_phone=&#8221;none&#8221; sticky_position_last_edited=&#8221;on|phone&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_blurb title=&#8221;Get in touch&#8221; content_max_width_tablet=&#8221;&#8221; content_max_width_phone=&#8221;&#8221; content_max_width_last_edited=&#8221;on|phone&#8221; module_id=&#8221;blog-contact-frm&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; header_font=&#8221;|600|||||||&#8221; header_text_color=&#8221;#e31c61&#8243; header_font_size=&#8221;22px&#8221; background_color=&#8221;#a2d4e9&#8243; width_tablet=&#8221;&#8221; width_phone=&#8221;80%&#8221; width_last_edited=&#8221;on|phone&#8221; custom_margin=&#8221;||-1px|||&#8221; custom_padding=&#8221;30px|20px|30px|20px|true|true&#8221; sticky_position=&#8221;top&#8221; sticky_limit_bottom=&#8221;section&#8221; module_alignment_tablet=&#8221;&#8221; module_alignment_phone=&#8221;center&#8221; module_alignment_last_edited=&#8221;on|phone&#8221; border_radii=&#8221;on|10px|10px|10px|10px&#8221; locked=&#8221;off&#8221; global_colors_info=&#8221;{}&#8221;]\n<div class=\"wpcf7 no-js\" id=\"wpcf7-f76-o1\" lang=\"en-US\" dir=\"ltr\" data-wpcf7-id=\"76\">\n<div class=\"screen-reader-response\"><p role=\"status\" aria-live=\"polite\" aria-atomic=\"true\"><\/p> <ul><\/ul><\/div>\n<form action=\"\/blog\/wp-json\/wp\/v2\/posts\/1283#wpcf7-f76-o1\" method=\"post\" class=\"wpcf7-form init\" aria-label=\"Contact form\" novalidate=\"novalidate\" data-status=\"init\">\n<fieldset class=\"hidden-fields-container\"><input type=\"hidden\" name=\"_wpcf7\" value=\"76\" \/><input type=\"hidden\" name=\"_wpcf7_version\" value=\"6.1.7\" \/><input type=\"hidden\" name=\"_wpcf7_locale\" value=\"en_US\" \/><input type=\"hidden\" name=\"_wpcf7_unit_tag\" value=\"wpcf7-f76-o1\" \/><input type=\"hidden\" name=\"_wpcf7_container_post\" value=\"0\" \/><input type=\"hidden\" name=\"_wpcf7_posted_data_hash\" value=\"\" \/>\n<\/fieldset>\n<p><label><span class=\"wpcf7-form-control-wrap\" data-name=\"your-name\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-text wpcf7-validates-as-required\" autocomplete=\"name\" aria-required=\"true\" aria-invalid=\"false\" placeholder=\"Name\" value=\"\" type=\"text\" name=\"your-name\" \/><\/span> <\/label><br \/>\n<label> <span class=\"wpcf7-form-control-wrap\" data-name=\"your-email\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-email wpcf7-validates-as-required wpcf7-text wpcf7-validates-as-email\" autocomplete=\"email\" aria-required=\"true\" aria-invalid=\"false\" placeholder=\"Email\" value=\"\" type=\"email\" name=\"your-email\" \/><\/span> <\/label><br \/>\n<label> <span class=\"wpcf7-form-control-wrap\" data-name=\"phone\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-tel wpcf7-validates-as-required wpcf7-text wpcf7-validates-as-tel\" aria-required=\"true\" aria-invalid=\"false\" placeholder=\"Phone Number\" value=\"\" type=\"tel\" name=\"phone\" \/><\/span><\/label><br \/>\n<label> <span class=\"wpcf7-form-control-wrap\" data-name=\"your-message\"><textarea cols=\"40\" rows=\"10\" maxlength=\"2000\" class=\"wpcf7-form-control wpcf7-textarea\" aria-invalid=\"false\" placeholder=\"Massage\" name=\"your-message\"><\/textarea><\/span> <\/label><br \/>\n<input class=\"wpcf7-form-control wpcf7-submit has-spinner\" type=\"submit\" value=\"Submit\" \/>\n<\/p><div class=\"wpcf7-response-output\" aria-hidden=\"true\"><\/div>\n<\/form>\n<\/div>\n[\/et_pb_blurb][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=&#8221;1&#8243; disabled_on=&#8221;on|on|on&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; custom_padding=&#8221;0px||0px||true|false&#8221; disabled=&#8221;on&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_row column_structure=&#8221;1_4,1_4,1_4,1_4&#8243; use_custom_gutter=&#8221;on&#8221; gutter_width=&#8221;1&#8243; make_equal=&#8221;on&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; width=&#8221;100%&#8221; max_width=&#8221;100%&#8221; custom_padding=&#8221;0px||0px||true|false&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;1_4&#8243; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; background_color=&#8221;#1677bb&#8221; custom_padding=&#8221;25px|20px|25px|20px|true|true&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_blurb title=&#8221;1963&#8243; use_icon=&#8221;on&#8221; font_icon=&#8221;&#xf133;||fa||400&#8243; icon_color=&#8221;#ffffff&#8221; image_icon_background_color=&#8221;rgba(239,239,239,0.29)&#8221; image_icon_width=&#8221;20px&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; header_font=&#8221;Aclonica|700|||||||&#8221; header_text_color=&#8221;#ffffff&#8221; header_font_size=&#8221;32px&#8221; body_font=&#8221;|300|||||||&#8221; body_text_color=&#8221;#ffffff&#8221; image_icon_custom_margin=&#8221;0px||||false|false&#8221; image_icon_custom_padding=&#8221;14px|15px|14px|15px|true|true&#8221; text_orientation=&#8221;center&#8221; border_radii_image=&#8221;on|104px|104px|104px|104px&#8221; global_colors_info=&#8221;{}&#8221;]<p><strong>Established Since 1963<\/strong><br \/>Oldest nursing home<br \/>in Secunderabad<\/p>[\/et_pb_blurb][\/et_pb_column][et_pb_column type=&#8221;1_4&#8243; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; background_color=&#8221;#e31c61&#8243; custom_padding=&#8221;25px|20px|25px|20px|false|true&#8221; border_color_top=&#8221;#0a0300&#8243; global_colors_info=&#8221;{}&#8221; border_width_top__hover_enabled=&#8221;on|hover&#8221; border_width_top__hover=&#8221;2px&#8221;][et_pb_blurb title=&#8221;\u00bc Cost&#8221; use_icon=&#8221;on&#8221; font_icon=&#8221;&#xf156;||fa||900&#8243; icon_color=&#8221;#ffffff&#8221; image_icon_background_color=&#8221;rgba(239,239,239,0.29)&#8221; image_icon_width=&#8221;20px&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; header_font=&#8221;Aclonica|700|||||||&#8221; header_text_color=&#8221;#ffffff&#8221; header_font_size=&#8221;32px&#8221; body_font=&#8221;|300|||||||&#8221; body_text_color=&#8221;#ffffff&#8221; image_icon_custom_margin=&#8221;0px||||false|false&#8221; image_icon_custom_padding=&#8221;12px|16px|12px|16px|true|true&#8221; text_orientation=&#8221;center&#8221; border_radii_image=&#8221;on|104px|104px|104px|104px&#8221; global_colors_info=&#8221;{}&#8221;]<div class=\"usp-title\"><strong>World-Class Care at<\/strong><br \/><strong>1\/4th the Price<\/strong><\/div>\n<div class=\"usp-sub\">Premium outcomes without<br \/>corporate hospital bills<\/div>[\/et_pb_blurb][\/et_pb_column][et_pb_column type=&#8221;1_4&#8243; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; background_color=&#8221;#1677bb&#8221; custom_padding=&#8221;25px|20px|25px|20px|true|true&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_blurb title=&#8221;1L+&#8221; use_icon=&#8221;on&#8221; font_icon=&#8221;&#xe030;||divi||400&#8243; icon_color=&#8221;#ffffff&#8221; image_icon_background_color=&#8221;rgba(239,239,239,0.29)&#8221; image_icon_width=&#8221;20px&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; header_font=&#8221;Aclonica|700|||||||&#8221; header_text_color=&#8221;#ffffff&#8221; header_font_size=&#8221;32px&#8221; body_font=&#8221;|300|||||||&#8221; body_text_color=&#8221;#ffffff&#8221; image_icon_custom_margin=&#8221;0px||||false|false&#8221; image_icon_custom_padding=&#8221;15px|16px|15px|16px|true|true&#8221; text_orientation=&#8221;center&#8221; border_radii_image=&#8221;on|104px|104px|104px|104px&#8221; global_colors_info=&#8221;{}&#8221;]<p><strong>Babies Delivered<\/strong><br \/>Successfully delivered<br \/>over 1 lakh babies<\/p>[\/et_pb_blurb][\/et_pb_column][et_pb_column type=&#8221;1_4&#8243; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; background_color=&#8221;#e31c61&#8243; custom_padding=&#8221;25px|20px|25px|20px|false|true&#8221; border_color_top=&#8221;#0a0300&#8243; global_colors_info=&#8221;{}&#8221; border_width_top__hover=&#8221;2px&#8221; border_width_top__hover_enabled=&#8221;on|hover&#8221;][et_pb_blurb title=&#8221;24\u00d77&#8243; use_icon=&#8221;on&#8221; font_icon=&#8221;&#x7d;||divi||400&#8243; icon_color=&#8221;#ffffff&#8221; image_icon_background_color=&#8221;rgba(239,239,239,0.29)&#8221; image_icon_width=&#8221;20px&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; header_font=&#8221;Aclonica|700|||||||&#8221; header_text_color=&#8221;#ffffff&#8221; header_font_size=&#8221;32px&#8221; body_font=&#8221;|300|||||||&#8221; body_text_color=&#8221;#ffffff&#8221; image_icon_custom_margin=&#8221;0px||||false|false&#8221; image_icon_custom_padding=&#8221;16px|16px|16px|16px|true|true&#8221; text_orientation=&#8221;center&#8221; border_radii_image=&#8221;on|104px|104px|104px|104px&#8221; global_colors_info=&#8221;{}&#8221;]<p><strong>Emergency Care<\/strong><br \/>Round-the-clock doctors,<br \/>ICU &amp; ambulance<\/p>[\/et_pb_blurb][\/et_pb_column][\/et_pb_row][\/et_pb_section]\n","protected":false},"excerpt":{"rendered":"<p>Not every tightness is cardiac. Shenoy Hospitals, Secunderabad explains the real causes, and when chest tightness is an emergency.<\/p>\n","protected":false},"author":2,"featured_media":1233,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"2880","footnotes":""},"categories":[1],"tags":[],"class_list":["post-1283","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Pulmonary Function Test: What It Actually Measures<\/title>\n<meta name=\"description\" content=\"A PFT checks lung volume, airflow speed and oxygen exchange. Shenoy Hospitals, Secunderabad explains what your results actually mean.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/shenoyhospitals.com\/blog\/pulmonary-function-test-what-it-measures\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Pulmonary Function Test: What It Actually Measures\" \/>\n<meta property=\"og:description\" content=\"A PFT checks lung volume, airflow speed and oxygen exchange. Shenoy Hospitals, Secunderabad explains what your results actually mean.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/shenoyhospitals.com\/blog\/pulmonary-function-test-what-it-measures\/\" \/>\n<meta property=\"og:site_name\" content=\"blogs -Shenoy Hospitals\" \/>\n<meta property=\"article:published_time\" content=\"2026-09-10T07:48:14+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-09-10T08:00:20+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/shenoyhospitals.com\/blog\/wp-content\/uploads\/2026\/08\/What-Does-a-Pulmonary-Function-Test-Actually-Measure.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"802\" \/>\n\t<meta property=\"og:image:height\" content=\"452\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"author\" content=\"content-team\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"Pulmonary Function Test: What It Actually Measures\" \/>\n<meta name=\"twitter:description\" content=\"A PFT checks lung volume, airflow speed and oxygen exchange. Shenoy Hospitals, Secunderabad explains what your results actually mean.\" \/>\n<meta name=\"twitter:image\" content=\"https:\/\/shenoyhospitals.com\/blog\/wp-content\/uploads\/2026\/08\/What-Does-a-Pulmonary-Function-Test-Actually-Measure.webp\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"content-team\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"8 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/shenoyhospitals.com\\\/blog\\\/pulmonary-function-test-what-it-measures\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/shenoyhospitals.com\\\/blog\\\/pulmonary-function-test-what-it-measures\\\/\"},\"author\":{\"name\":\"content-team\",\"@id\":\"https:\\\/\\\/shenoyhospitals.com\\\/blog\\\/#\\\/schema\\\/person\\\/74dc5725171ce50b2f7ddbabafbbe22e\"},\"headline\":\"Pulmonary Function Test: What It Actually Measures\",\"datePublished\":\"2026-09-10T07:48:14+00:00\",\"dateModified\":\"2026-09-10T08:00:20+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/shenoyhospitals.com\\\/blog\\\/pulmonary-function-test-what-it-measures\\\/\"},\"wordCount\":3163,\"image\":{\"@id\":\"https:\\\/\\\/shenoyhospitals.com\\\/blog\\\/pulmonary-function-test-what-it-measures\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/shenoyhospitals.com\\\/blog\\\/wp-content\\\/uploads\\\/2026\\\/08\\\/What-Does-a-Pulmonary-Function-Test-Actually-Measure.webp\",\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/shenoyhospitals.com\\\/blog\\\/pulmonary-function-test-what-it-measures\\\/\",\"url\":\"https:\\\/\\\/shenoyhospitals.com\\\/blog\\\/pulmonary-function-test-what-it-measures\\\/\",\"name\":\"Pulmonary Function Test: What It Actually Measures\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/shenoyhospitals.com\\\/blog\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/shenoyhospitals.com\\\/blog\\\/pulmonary-function-test-what-it-measures\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/shenoyhospitals.com\\\/blog\\\/pulmonary-function-test-what-it-measures\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/shenoyhospitals.com\\\/blog\\\/wp-content\\\/uploads\\\/2026\\\/08\\\/What-Does-a-Pulmonary-Function-Test-Actually-Measure.webp\",\"datePublished\":\"2026-09-10T07:48:14+00:00\",\"dateModified\":\"2026-09-10T08:00:20+00:00\",\"author\":{\"@id\":\"https:\\\/\\\/shenoyhospitals.com\\\/blog\\\/#\\\/schema\\\/person\\\/74dc5725171ce50b2f7ddbabafbbe22e\"},\"description\":\"A PFT checks lung volume, airflow speed and oxygen exchange. Shenoy Hospitals, Secunderabad explains what your results actually mean.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/shenoyhospitals.com\\\/blog\\\/pulmonary-function-test-what-it-measures\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/shenoyhospitals.com\\\/blog\\\/pulmonary-function-test-what-it-measures\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/shenoyhospitals.com\\\/blog\\\/pulmonary-function-test-what-it-measures\\\/#primaryimage\",\"url\":\"https:\\\/\\\/shenoyhospitals.com\\\/blog\\\/wp-content\\\/uploads\\\/2026\\\/08\\\/What-Does-a-Pulmonary-Function-Test-Actually-Measure.webp\",\"contentUrl\":\"https:\\\/\\\/shenoyhospitals.com\\\/blog\\\/wp-content\\\/uploads\\\/2026\\\/08\\\/What-Does-a-Pulmonary-Function-Test-Actually-Measure.webp\",\"width\":802,\"height\":452,\"caption\":\"Pulmonary Function Test\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/shenoyhospitals.com\\\/blog\\\/pulmonary-function-test-what-it-measures\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/shenoyhospitals.com\\\/blog\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Pulmonary Function Test: What It Actually Measures\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/shenoyhospitals.com\\\/blog\\\/#website\",\"url\":\"https:\\\/\\\/shenoyhospitals.com\\\/blog\\\/\",\"name\":\"blogs -Shenoy Hospitals\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/shenoyhospitals.com\\\/blog\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/shenoyhospitals.com\\\/blog\\\/#\\\/schema\\\/person\\\/74dc5725171ce50b2f7ddbabafbbe22e\",\"name\":\"content-team\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/1f55f969e83493a1a25bfb44fae04e5dfd81b51f5784d8dad2598c75983b8eff?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/1f55f969e83493a1a25bfb44fae04e5dfd81b51f5784d8dad2598c75983b8eff?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/1f55f969e83493a1a25bfb44fae04e5dfd81b51f5784d8dad2598c75983b8eff?s=96&d=mm&r=g\",\"caption\":\"content-team\"}}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Pulmonary Function Test: What It Actually Measures","description":"A PFT checks lung volume, airflow speed and oxygen exchange. Shenoy Hospitals, Secunderabad explains what your results actually mean.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/shenoyhospitals.com\/blog\/pulmonary-function-test-what-it-measures\/","og_locale":"en_US","og_type":"article","og_title":"Pulmonary Function Test: What It Actually Measures","og_description":"A PFT checks lung volume, airflow speed and oxygen exchange. Shenoy Hospitals, Secunderabad explains what your results actually mean.","og_url":"https:\/\/shenoyhospitals.com\/blog\/pulmonary-function-test-what-it-measures\/","og_site_name":"blogs -Shenoy Hospitals","article_published_time":"2026-09-10T07:48:14+00:00","article_modified_time":"2026-09-10T08:00:20+00:00","og_image":[{"width":802,"height":452,"url":"https:\/\/shenoyhospitals.com\/blog\/wp-content\/uploads\/2026\/08\/What-Does-a-Pulmonary-Function-Test-Actually-Measure.webp","type":"image\/webp"}],"author":"content-team","twitter_card":"summary_large_image","twitter_title":"Pulmonary Function Test: What It Actually Measures","twitter_description":"A PFT checks lung volume, airflow speed and oxygen exchange. Shenoy Hospitals, Secunderabad explains what your results actually mean.","twitter_image":"https:\/\/shenoyhospitals.com\/blog\/wp-content\/uploads\/2026\/08\/What-Does-a-Pulmonary-Function-Test-Actually-Measure.webp","twitter_misc":{"Written by":"content-team","Est. reading time":"8 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/shenoyhospitals.com\/blog\/pulmonary-function-test-what-it-measures\/#article","isPartOf":{"@id":"https:\/\/shenoyhospitals.com\/blog\/pulmonary-function-test-what-it-measures\/"},"author":{"name":"content-team","@id":"https:\/\/shenoyhospitals.com\/blog\/#\/schema\/person\/74dc5725171ce50b2f7ddbabafbbe22e"},"headline":"Pulmonary Function Test: What It Actually Measures","datePublished":"2026-09-10T07:48:14+00:00","dateModified":"2026-09-10T08:00:20+00:00","mainEntityOfPage":{"@id":"https:\/\/shenoyhospitals.com\/blog\/pulmonary-function-test-what-it-measures\/"},"wordCount":3163,"image":{"@id":"https:\/\/shenoyhospitals.com\/blog\/pulmonary-function-test-what-it-measures\/#primaryimage"},"thumbnailUrl":"https:\/\/shenoyhospitals.com\/blog\/wp-content\/uploads\/2026\/08\/What-Does-a-Pulmonary-Function-Test-Actually-Measure.webp","inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/shenoyhospitals.com\/blog\/pulmonary-function-test-what-it-measures\/","url":"https:\/\/shenoyhospitals.com\/blog\/pulmonary-function-test-what-it-measures\/","name":"Pulmonary Function Test: What It Actually Measures","isPartOf":{"@id":"https:\/\/shenoyhospitals.com\/blog\/#website"},"primaryImageOfPage":{"@id":"https:\/\/shenoyhospitals.com\/blog\/pulmonary-function-test-what-it-measures\/#primaryimage"},"image":{"@id":"https:\/\/shenoyhospitals.com\/blog\/pulmonary-function-test-what-it-measures\/#primaryimage"},"thumbnailUrl":"https:\/\/shenoyhospitals.com\/blog\/wp-content\/uploads\/2026\/08\/What-Does-a-Pulmonary-Function-Test-Actually-Measure.webp","datePublished":"2026-09-10T07:48:14+00:00","dateModified":"2026-09-10T08:00:20+00:00","author":{"@id":"https:\/\/shenoyhospitals.com\/blog\/#\/schema\/person\/74dc5725171ce50b2f7ddbabafbbe22e"},"description":"A PFT checks lung volume, airflow speed and oxygen exchange. Shenoy Hospitals, Secunderabad explains what your results actually mean.","breadcrumb":{"@id":"https:\/\/shenoyhospitals.com\/blog\/pulmonary-function-test-what-it-measures\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/shenoyhospitals.com\/blog\/pulmonary-function-test-what-it-measures\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/shenoyhospitals.com\/blog\/pulmonary-function-test-what-it-measures\/#primaryimage","url":"https:\/\/shenoyhospitals.com\/blog\/wp-content\/uploads\/2026\/08\/What-Does-a-Pulmonary-Function-Test-Actually-Measure.webp","contentUrl":"https:\/\/shenoyhospitals.com\/blog\/wp-content\/uploads\/2026\/08\/What-Does-a-Pulmonary-Function-Test-Actually-Measure.webp","width":802,"height":452,"caption":"Pulmonary Function Test"},{"@type":"BreadcrumbList","@id":"https:\/\/shenoyhospitals.com\/blog\/pulmonary-function-test-what-it-measures\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/shenoyhospitals.com\/blog\/"},{"@type":"ListItem","position":2,"name":"Pulmonary Function Test: What It Actually Measures"}]},{"@type":"WebSite","@id":"https:\/\/shenoyhospitals.com\/blog\/#website","url":"https:\/\/shenoyhospitals.com\/blog\/","name":"blogs -Shenoy Hospitals","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/shenoyhospitals.com\/blog\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/shenoyhospitals.com\/blog\/#\/schema\/person\/74dc5725171ce50b2f7ddbabafbbe22e","name":"content-team","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/1f55f969e83493a1a25bfb44fae04e5dfd81b51f5784d8dad2598c75983b8eff?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/1f55f969e83493a1a25bfb44fae04e5dfd81b51f5784d8dad2598c75983b8eff?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/1f55f969e83493a1a25bfb44fae04e5dfd81b51f5784d8dad2598c75983b8eff?s=96&d=mm&r=g","caption":"content-team"}}]}},"_links":{"self":[{"href":"https:\/\/shenoyhospitals.com\/blog\/wp-json\/wp\/v2\/posts\/1283","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/shenoyhospitals.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/shenoyhospitals.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/shenoyhospitals.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/shenoyhospitals.com\/blog\/wp-json\/wp\/v2\/comments?post=1283"}],"version-history":[{"count":4,"href":"https:\/\/shenoyhospitals.com\/blog\/wp-json\/wp\/v2\/posts\/1283\/revisions"}],"predecessor-version":[{"id":1289,"href":"https:\/\/shenoyhospitals.com\/blog\/wp-json\/wp\/v2\/posts\/1283\/revisions\/1289"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/shenoyhospitals.com\/blog\/wp-json\/wp\/v2\/media\/1233"}],"wp:attachment":[{"href":"https:\/\/shenoyhospitals.com\/blog\/wp-json\/wp\/v2\/media?parent=1283"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/shenoyhospitals.com\/blog\/wp-json\/wp\/v2\/categories?post=1283"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/shenoyhospitals.com\/blog\/wp-json\/wp\/v2\/tags?post=1283"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}