{"id":1003,"date":"2022-08-08T01:39:12","date_gmt":"2022-08-08T05:39:12","guid":{"rendered":"https:\/\/aafa.org\/?page_id=1003"},"modified":"2025-10-07T13:03:43","modified_gmt":"2025-10-07T17:03:43","slug":"peak-flow-meters","status":"publish","type":"page","link":"https:\/\/aafa.org\/asthma\/asthma-diagnosis\/lung-function-tests-diagnose-asthma\/peak-flow-meters\/","title":{"rendered":"Peak Flow Meters"},"content":{"rendered":"<p>[et_pb_section fb_built=&#8221;1&#8243; admin_label=&#8221;Asthma T-Hero Section&#8221; module_class=&#8221;hero tert&#8221; _builder_version=&#8221;4.18.0&#8243; _module_preset=&#8221;default&#8221; background_image=&#8221;https:\/\/aafa.org\/wp-content\/uploads\/2022\/07\/AAFA-Website_Tertiary_Asthma.jpg&#8221; background_position=&#8221;top_right&#8221; custom_padding=&#8221;1%||1%||true|false&#8221; global_module=&#8221;2247&#8243; saved_tabs=&#8221;all&#8221; collapsed=&#8221;on&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_row _builder_version=&#8221;4.17.4&#8243; _module_preset=&#8221;default&#8221; background_enable_image=&#8221;off&#8221; background_size=&#8221;initial&#8221; background_position=&#8221;bottom_left&#8221; background_horizontal_offset=&#8221;0%&#8221; custom_margin=&#8221;||||false|false&#8221; custom_padding=&#8221;2%||0px||false|false&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.17.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_text admin_label=&#8221;Nav Parent Title&#8221; module_class=&#8221;tert-parent&#8221; _builder_version=&#8221;4.17.4&#8243; _module_preset=&#8221;default&#8221; header_2_font=&#8221;|600|||||||&#8221; header_2_text_align=&#8221;left&#8221; header_2_text_color=&#8221;#FFFFFF&#8221; header_2_font_size=&#8221;32px&#8221; custom_margin=&#8221;||0px||false|false&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<h2>Asthma<\/h2>\n<p>[\/et_pb_text][et_pb_code admin_label=&#8221;Breadcrumbs&#8221; module_class=&#8221;bcrumb&#8221; _builder_version=&#8221;4.17.4&#8243; _module_preset=&#8221;default&#8221; text_orientation=&#8221;left&#8221; custom_margin=&#8221;||||false|false&#8221; custom_padding=&#8221;||||false|false&#8221; custom_css_main_element=&#8221;font-size:16px;||color: #fff;&#8221; global_colors_info=&#8221;{}&#8221;][\/et_pb_code][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=&#8221;1&#8243; admin_label=&#8221;Main Content&#8221; _builder_version=&#8221;4.17.4&#8243; _module_preset=&#8221;default&#8221; custom_padding=&#8221;2%||2%||true|false&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_row column_structure=&#8221;2_3,1_3&#8243; _builder_version=&#8221;4.17.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;2_3&#8243; _builder_version=&#8221;4.17.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_post_title meta=&#8221;off&#8221; featured_image=&#8221;off&#8221; admin_label=&#8221;Page Title&#8221; module_class=&#8221;tert-content q&#8221; _builder_version=&#8221;4.17.4&#8243; _module_preset=&#8221;default&#8221; title_font=&#8221;|600|||||||&#8221; title_text_align=&#8221;left&#8221; title_text_color=&#8221;#008c99&#8243; title_font_size=&#8221;39px&#8221; background_enable_image=&#8221;off&#8221; background_size=&#8221;contain&#8221; background_position=&#8221;center_left&#8221; module_alignment=&#8221;left&#8221; custom_margin=&#8221;||0px||false|false&#8221; custom_padding=&#8221;||||false|false&#8221; global_colors_info=&#8221;{}&#8221;][\/et_pb_post_title][et_pb_text admin_label=&#8221; Intro Content&#8221; module_class=&#8221;secondary-intro&#8221; _builder_version=&#8221;4.19.0&#8243; _module_preset=&#8221;default&#8221; text_text_color=&#8221;#505050&#8243; text_font_size=&#8221;24px&#8221; text_line_height=&#8221;1.5em&#8221; header_2_font=&#8221;|600|||||||&#8221; header_2_text_color=&#8221;#008c99&#8243; header_2_font_size=&#8221;39px&#8221; custom_margin=&#8221;||3%||false|false&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<p>A peak flow meter is a handheld device that measures how well air moves out of your lungs. During an asthma episode, your airways often narrow. A peak flow meter can measure this narrowing hours, even days, before you have any <a title=\"Asthma Symptoms\" href=\"\/asthma\/asthma-symptoms\/\" rel=\"noopener\">asthma symptoms<\/a>.<\/p>\n<p>[\/et_pb_text][et_pb_text admin_label=&#8221;Page Content&#8221; module_class=&#8221;secondary-intro&#8221; _builder_version=&#8221;4.19.0&#8243; _module_preset=&#8221;default&#8221; text_text_color=&#8221;#505050&#8243; text_line_height=&#8221;1.5em&#8221; header_2_font=&#8221;|600|||||||&#8221; header_2_text_color=&#8221;#008c99&#8243; header_2_font_size=&#8221;39px&#8221; custom_margin=&#8221;||3%||false|false&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-3159 alignleft size-medium\" src=\"https:\/\/aafa.org\/wp-content\/uploads\/2022\/08\/lung-function-test-peak-flow-meter-lg-300x210.png\" alt=\"Peak Flow Test\" width=\"300\" height=\"210\" \/>A peak flow meter is a handheld device that measures how well air moves out of your lungs. During an asthma episode, your airways often narrow. A peak flow meter can measure this narrowing hours, even days, before you have any <a title=\"Asthma Symptoms\" href=\"\/asthma\/asthma-symptoms\/\" rel=\"noopener\">asthma symptoms<\/a>.<\/p>\n<p>In fact, a peak flow meter is so sensitive to changes in your airways that it can alert you to breathing issues even better than a doctor can when listening to your lungs with a stethoscope.<\/p>\n<p>By taking your asthma medicine when your peak flow meter indicates changes \u2013 before you notice symptoms \u2013 you may be able to avoid a serious asthma episode.<\/p>\n<p>A peak flow meter can also help you and your doctor:<\/p>\n<div class=\"box-asthma\">\n<ul class=\"h-list\">\n<li class=\"actionplan\"><img decoding=\"async\" src=\"\/wp-content\/uploads\/2022\/08\/asthma-action-plan-peak-flow-meter.png\" alt=\"Asthma Action Plan\" loading=\"lazy\" \/><br \/>Decide if your <a title=\"Asthma Action Plan\" href=\"\/asthma\/asthma-treatment\/asthma-action-plan\/\" rel=\"noopener\">Asthma Action Plan<\/a> is working well<\/li>\n<li class=\"medicine\"><img decoding=\"async\" src=\"\/wp-content\/uploads\/2022\/08\/medicine-peak-flow-meter.png\" alt=\"Adjusting Medicine\" loading=\"lazy\" \/><br \/>Decide when to add, increase or even stop a medicine<\/li>\n<li class=\"emergency\"><img decoding=\"async\" src=\"\/wp-content\/uploads\/2022\/08\/identify-emergency-peak-flow-meter.png\" alt=\"seek emergency care\" loading=\"lazy\" \/><br \/>Decide when to seek emergency care<\/li>\n<li class=\"triggers\"><img decoding=\"async\" src=\"\/wp-content\/uploads\/2022\/08\/identify-triggers-peak-flow-meter.png\" alt=\"identify asthma triggers\" loading=\"lazy\" \/><br \/>Identify <a title=\"Asthma Triggers\" href=\"\/asthma\/asthma-triggers\/\" rel=\"noopener\">triggers<\/a> (things that cause asthma symptoms)<\/li>\n<li class=\"understand\"><img decoding=\"async\" src=\"\/wp-content\/uploads\/2022\/08\/understand-asthma-peak-flow-meter.png\" alt=\"Understand your asthma\" loading=\"lazy\" \/><br \/>Better understand and talk about your asthma<\/li>\n<\/ul>\n<\/div>\n<p>Measure your peak flow at least once a day, usually in the morning before you take your asthma medicines. You might have to check it more often if you are having more episodes than usual, or if your reading is below 80 percent of your personal best. Check your Asthma Action Plan. Remember to always use the same peak flow meter.<\/p>\n<h3>How Do I Use a Peak Flow Meter?<\/h3>\n<ol>\n<li>Place the indicator at the base of the numbered scale.<\/li>\n<li>Stand up.<\/li>\n<li>Take a deep breath.<\/li>\n<li>Place the meter in your mouth between your teeth and close your lips around the mouthpiece. Do not let your tongue block the hole in the mouthpiece.<\/li>\n<li>Blow out as hard and fast as you can in a single blow.<\/li>\n<li>Write down the number you get. But if you cough as you use the meter or make a mistake, don\u2019t use that number. Blow into the meter again and get a new reading.<\/li>\n<li>Immediately repeat steps 1 through 6 two more times.<\/li>\n<li>Write down the highest of the three numbers in your asthma diary.<\/li>\n<\/ol>\n<h3>How Do I Find My Personal Best Number?<\/h3>\n<p>Your personal best peak flow number is the highest peak flow number you have over a two- to three-week period when your asthma is under good control. Good control is when you feel good and do not have any asthma symptoms.<\/p>\n<p>Everyone\u2019s asthma is different, so your best peak flow may be different from the average number for someone of your height, weight and gender. Your Asthma Action Plan needs to be based on <strong>your<\/strong> personal best peak flow number.<\/p>\n<p>To find out your personal best peak flow number, take peak flow readings:<\/p>\n<ul>\n<li>At least two times a day for two to three weeks<\/li>\n<li>When you wake up and between noon and 2 p.m.<\/li>\n<li>Before and after taking quick-relief medicine<\/li>\n<li>When you get a new peak flow meter, even if it is the same kind as you have used in the past<\/li>\n<li>As instructed by your doctor<\/li>\n<\/ul>\n<h3>What Are the Peak Flow Zones?<\/h3>\n<p>Once you know your personal best peak flow number, your doctor will give you a range of numbers that tell you what to do. The peak flow numbers are put into a chart with zones that are set up like a traffic light. It is easiest if these target zones are added to your Asthma Action Plan. This will help you know what to do when your peak flow number changes. For example:<\/p>\n<p><img decoding=\"async\" style=\"float: left; padding: 8px;\" src=\"https:\/\/aafa.org\/wp-content\/uploads\/2022\/08\/green-zone-peak-flow-meter.png\" alt=\"80 to 100 percent of your personal best number\" loading=\"lazy\" \/><strong>Green Zone<\/strong> (80 to 100 percent of your personal best number) signals <strong>all clear<\/strong>. No asthma symptoms are present. Take your daily controller medicines (if prescribed), as usual.<\/p>\n<div class=\"clearfix\">\u00a0<\/div>\n<p><img decoding=\"async\" style=\"float: left; padding: 8px;\" src=\"https:\/\/aafa.org\/wp-content\/uploads\/2022\/08\/yellow-zone-peak-flow-meter.png\" alt=\"50 to 80 percent of your personal best number\" loading=\"lazy\" \/><strong>Yellow Zone<\/strong> (50 to 80 percent of your personal best number) signals caution. You should take a quick-relief medicine and check to see if your peak flow returns to the green zone. You may be having an asthma episode that requires an increase in your medicines or the addition of new medicines. Or your overall asthma may not be under control. Your doctor may need to change your Asthma Action Plan. Follow your Asthma Action Plan and seek additional medical care as indicated.<\/p>\n<p><img decoding=\"async\" style=\"float: left; padding: 8px;\" src=\"https:\/\/aafa.org\/wp-content\/uploads\/2022\/08\/red-zone-peak-flow-meter.png\" alt=\"below 50 percent of your personal best number\" loading=\"lazy\" \/><strong>Red Zone<\/strong> (below 50 percent of your personal best number) signals a medical emergency. You must take your quick-relief medicine right away. Call your doctor immediately if your peak flow number does not return to the yellow or green zone and stay in that zone. If you cannot reach your doctor and your peak flow stays in the red zone, go directly to the emergency room. Your Asthma Action Plan should provide clear instructions.<\/p>\n<h3>What Are Some Important Things to Remember?<\/h3>\n<ul>\n<li>Write down your peak flow number in your asthma diary every day.<\/li>\n<li>A decrease in peak flow of 20 to 30 percent of your personal best may mean the start of an asthma episode.<\/li>\n<li>Your Asthma Action Plan may tell you to take your peak flow reading more often and to adjust your medicines.<\/li>\n<li>Use only one meter. Be sure to bring it to your asthma check-ups.<\/li>\n<\/ul>\n<p>A peak flow reading will only be as good as your effort. Numbers can be artificially high with tongue thrusts or spitting. Or they may be artificially low due to not enough effort or poor technique.<\/p>\n<p>[\/et_pb_text][et_pb_text admin_label=&#8221;Medical Review&#8221; _builder_version=&#8221;4.19.0&#8243; _module_preset=&#8221;default&#8221; text_text_color=&#8221;#505050&#8243; text_font_size=&#8221;16px&#8221; link_text_color=&#8221;#008C99&#8243; link_font_size=&#8221;16px&#8221; header_5_font=&#8221;|600|||||||&#8221; header_5_text_align=&#8221;left&#8221; header_5_text_color=&#8221;#008c99&#8243; custom_margin=&#8221;||3%||false|false&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<p><small><a title=\"Medical Science Council\" href=\"\/about-aafa\/leadership\/medical-science-council\/\" rel=\"noopener\">Medical Review<\/a> December 2017.<\/small><\/p>\n<p>[\/et_pb_text][et_pb_code admin_label=&#8221;Print&#8221; module_id=&#8221;print&#8221; module_class=&#8221;clearfix&#8221; _builder_version=&#8221;4.17.6&#8243; _module_preset=&#8221;default&#8221; global_module=&#8221;5156&#8243; saved_tabs=&#8221;all&#8221; global_colors_info=&#8221;{}&#8221;]<a href=\"https:\/\/aafa.org\/asthma\/asthma-diagnosis\/lung-function-tests-diagnose-asthma\/peak-flow-meters\/print\/\" rel=\"nofollow\" title=\"Print post\"><svg class=\"WP-PrintIcon wp-print-icon\" width=\"16\" height=\"16\" viewbox=\"0 0 20 20\" fill=\"currentColor\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M6 2h8v4H6z\" \/><path d=\"M3 7h14v7h-3v-3H6v3H3z\" \/><path d=\"M6 12h8v6H6z\" \/><\/svg> Print post<\/a> [\/et_pb_code][\/et_pb_column][et_pb_column type=&#8221;1_3&#8243; _builder_version=&#8221;4.17.4&#8243; _module_preset=&#8221;default&#8221; custom_padding=&#8221;6%||||false|false&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_text ul_type=&#8221;none&#8221; admin_label=&#8221;Side Nav &#8211; Lung Function Tests&#8221; module_class=&#8221;sidenav&#8221; _builder_version=&#8221;4.18.0&#8243; _module_preset=&#8221;default&#8221; text_text_color=&#8221;#008C99&#8243; text_font_size=&#8221;14px&#8221; link_text_align=&#8221;left&#8221; link_text_color=&#8221;#008C99&#8243; link_font_size=&#8221;16px&#8221; link_line_height=&#8221;1.7em&#8221; ul_text_color=&#8221;#008C99&#8243; ul_font_size=&#8221;16px&#8221; ul_line_height=&#8221;1.7em&#8221; header_4_font=&#8221;|700|||||||&#8221; header_4_text_align=&#8221;left&#8221; header_4_text_color=&#8221;#008C99&#8243; header_4_font_size=&#8221;16px&#8221; header_4_line_height=&#8221;1.7em&#8221; background_color=&#8221;#F5EDDF&#8221; custom_padding=&#8221;6%|6%|6%|6%|true|true&#8221; border_color_top=&#8221;#008C99&#8243; global_module=&#8221;9563&#8243; saved_tabs=&#8221;all&#8221; global_colors_info=&#8221;{}&#8221; link_text_color__hover_enabled=&#8221;on|hover&#8221; link_text_color__hover=&#8221;#692D87&#8243;]<\/p>\n<h4><a href=\"\/asthma\/asthma-diagnosis\/lung-function-tests-diagnose-asthma\/\">Lung Function Tests<\/a><\/h4>\n<ul>\n<li><a href=\"\/asthma\/asthma-diagnosis\/lung-function-tests-diagnose-asthma\/feno-tests-to-monitor-feno-levels\/\">FeNO Tests\u00a0to Monitor FeNO Levels<\/a><\/li>\n<li><a href=\"\/asthma\/asthma-diagnosis\/lung-function-tests-diagnose-asthma\/peak-flow-meters\/\">Peak Flow Meters<\/a><\/li>\n<li><a href=\"\/asthma\/asthma-diagnosis\/lung-function-tests-diagnose-asthma\/provocation-trigger-tests\/\">Provocation Tests<\/a><\/li>\n<li><a href=\"\/asthma\/asthma-diagnosis\/lung-function-tests-diagnose-asthma\/spirometry\/\">Spirometry<\/a><\/li>\n<\/ul>\n<p>[\/et_pb_text][et_pb_video src=&#8221;https:\/\/www.youtube.com\/watch?v=D0HvxftFDrU&#8221; admin_label=&#8221;YouTube Video&#8221; _builder_version=&#8221;4.18.0&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/et_pb_video][et_pb_button button_url=&#8221;\/asthma\/&#8221; button_text=&#8221;Asthma Resources&#8221; button_alignment=&#8221;center&#8221; admin_label=&#8221;Asthma Resources Button&#8221; _builder_version=&#8221;4.18.0&#8243; _module_preset=&#8221;default&#8221; custom_button=&#8221;on&#8221; button_use_icon=&#8221;off&#8221; custom_css_main_element=&#8221;width:100%;&#8221; global_module=&#8221;613&#8243; global_colors_info=&#8221;{}&#8221;][\/et_pb_button][et_pb_text admin_label=&#8221;Asthma Care for Adults&#8221; module_class=&#8221;aca-sb&#8221; _builder_version=&#8221;4.19.0&#8243; _module_preset=&#8221;default&#8221; text_text_color=&#8221;#505050&#8243; text_font_size=&#8221;16px&#8221; text_line_height=&#8221;1.4em&#8221; link_font=&#8221;||||on|||#008c99|&#8221; link_text_color=&#8221;#008c99&#8243; link_font_size=&#8221;16px&#8221; link_line_height=&#8221;1.4em&#8221; ul_line_height=&#8221;1.7em&#8221; header_2_font=&#8221;|600|||||||&#8221; header_2_text_color=&#8221;#008c99&#8243; header_2_font_size=&#8221;39px&#8221; header_3_font=&#8221;|600|||||||&#8221; header_3_text_align=&#8221;left&#8221; header_3_text_color=&#8221;#008c99&#8243; header_3_font_size=&#8221;28px&#8221; background_color=&#8221;RGBA(255,255,255,0)&#8221; custom_padding=&#8221;0%|0%|0%|0%|true|true&#8221; global_module=&#8221;5087&#8243; saved_tabs=&#8221;all&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<p><a href=\"https:\/\/www.pathlms.com\/aafa\/courses\/8092\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-3050 size-full\" src=\"\/wp-content\/uploads\/2022\/08\/asthma-care-for-adults-bt.png\" alt=\"Asthma Care for Adults\" width=\"630\" height=\"420\" srcset=\"\/wp-content\/uploads\/2022\/08\/asthma-care-for-adults-bt.png 630w, \/wp-content\/uploads\/2022\/08\/asthma-care-for-adults-bt-480x320.png 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 630px, 100vw\" \/><\/a><br \/>\nKnowing how to manage asthma is important for better health and quality of life. We offer an online course called <a title=\"Asthma Care for Adults\" href=\"https:\/\/www.pathlms.com\/aafa\/courses\/8092\" target=\"_blank\" rel=\"noopener noreferrer\">ASTHMA Care for Adults<\/a>. This comprehensive program covers a full range of topics everyone with asthma needs to know. This self-paced online course is presented in different formats, such as videos, animations, handouts and more.<\/p>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>AsthmaA peak flow meter is a handheld device that measures how well air moves out of your lungs. During an asthma episode, your airways often narrow. A peak flow meter [&hellip;]<\/p>\n","protected":false},"author":14,"featured_media":0,"parent":115,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":"","_links_to":"","_links_to_target":""},"class_list":["post-1003","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.5 (Yoast SEO v28.5) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Using a Peak Flow Meter to Manage Asthma | AAFA.org<\/title>\n<meta name=\"description\" content=\"A peak flow meter measures how well air moves out of your lungs. 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