What is a pulmonary function test?

The effectiveness of the lungs is determined by a pulmonary function test. The test evaluates lung volume, capacity, gas exchange, and rate of flow, as well as other lung-related characteristics. Your doctor may be able to identify and treat some lung diseases based on the results.

How are pulmonary function tests performed?

Pulmonary function tests can be performed in two ways, depending on the information your doctor needs. In some cases, your doctor may request both tests since they measure different things. To evaluate your breathing, your doctor may use a spirometer (a device with a mouthpiece) or have you stand inside an air-tight box that resembles a telephone booth.

What does a pulmonary function test measure?

A pulmonary function test evaluates several elements of lung health. Here are a few examples:The volume of the lungs when they are entirely full of air is known as total lung capacity.The amount of air you can forcefully expel once your lungs have been completely filled is known as forced vital capacity.After you've expelled as much as you can, the amount of air left in your lungs.Functional residual capacity is the quantity of air left in your lungs after you typically exhale.

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13 instant-book locations

Quest Diagnostics

Open until 4:00 pm

Mon 7:00 am - 4:00 pm
Tue 7:00 am - 4:00 pm
Wed 7:00 am - 4:00 pm
Thu 7:00 am - 4:00 pm
Fri 7:00 am - 4:00 pm
Sat 7:00 am - 11:00 am
SunClosed

649 E Calaveras Blvd, Milpitas, CA 95035649 E Calaveras Blvd

4.12(428 reviews)

Lab testing

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I thought it was extremely easy to book a lab test appointment with Quest. Getting the test done was simple and so was the getting the results! Great job putting together something so user friendly.

Labcorp

Open until 3:00 pm

Mon 7:00 am - 3:00 pm
Tue 7:00 am - 3:00 pm
Wed 7:00 am - 3:00 pm
Thu 7:00 am - 3:00 pm
Fri 7:00 am - 3:00 pm
SatClosed
SunClosed

1048 El Camino Real, Redwood City, CA 940631048 El Camino Real

4.26(580 reviews)

Lab testing

Great discreet service, scheduled my visit and paid for for the test online not in Showed up at lab, checked in and was seen within minutes. Blood and urine were collected, test results came back quickly within 2 days because I did my test on a Friday. Quick, easy and cheap. Didn't have to wait for a visit to my PCP, and then get referral to lab.

Quest Diagnostics

Open until 4:00 pm

Mon 7:00 am - 4:00 pm
Tue 7:00 am - 4:00 pm
Wed 7:00 am - 4:00 pm
Thu 7:00 am - 4:00 pm
Fri 7:00 am - 4:00 pm
SatClosed
SunClosed

50 E Main Ave, Morgan Hill, CA 9503750 E Main Ave

4.48(467 reviews)

Lab testing

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I came in one day without an appoint and waited two hours as a walk-in before I had to leave without being tested. I made an appointment through Quest Lab Testing for the next day, showed up on time, got tested easily and was on my way in 15-20 minutes. Staff is friendly and helpful.

Quest Diagnostics

Open until 4:00 pm

Mon 7:00 am - 4:00 pm
Tue 7:00 am - 4:00 pm
Wed 7:00 am - 4:00 pm
Thu 7:00 am - 4:00 pm
Fri 7:00 am - 4:00 pm
SatClosed
SunClosed

1100 Laurel St, San Carlos, CA 940701100 Laurel St

4.18(412 reviews)

Lab testing

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I thought it was extremely easy to book a lab test appointment with Quest. Getting the test done was simple and so was the getting the results! Great job putting together something so user friendly.

Quest Diagnostics

Open until 11:30 am

Mon 7:00 am - 11:30 am
Tue 7:00 am - 11:30 am
Wed 7:00 am - 11:30 am
Thu 7:00 am - 11:30 am
Fri 7:00 am - 11:30 am
SatClosed
SunClosed

1100 El Camino Real, Belmont, CA 940021100 El Camino Real

4.38(456 reviews)

Lab testing

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Quest Diagnostics

Open until 4:30 pm

Mon 6:00 am - 4:30 pm
Tue 6:00 am - 4:30 pm
Wed 6:00 am - 4:30 pm
Thu 6:00 am - 4:30 pm
Fri 6:00 am - 4:30 pm
Sat 6:30 am - 11:00 am
SunClosed

39273 Liberty St, Fremont, CA 9453839273 Liberty St

4.4(404 reviews)

Lab testing

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I would 100% recommend this company to anyone wanting to check their health status. The process was incredibly easy and done through certified labs. The results are frequently back by the next day.

Quest Diagnostics

Open until 10:30 am

Mon 7:00 am - 10:30 am
Tue 7:00 am - 10:30 am
Wed 7:00 am - 10:30 am
Thu 7:00 am - 10:30 am
Fri 7:00 am - 10:30 am
Sat 7:00 am - 11:00 am
SunClosed

7880 Wren Ave, Gilroy, CA 950207880 Wren Ave

4.13(429 reviews)

Lab testing

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Excellent customer service. Knowledgeably answered all questions. Appointment and billing were fast. Testing next day was on time and professional. Results available within 24 hours. Highly recommend.

Quest Diagnostics

Open until 5:00 pm

Mon 6:30 am - 5:00 pm
Tue 6:30 am - 5:00 pm
Wed 6:30 am - 5:00 pm
Thu 6:30 am - 5:00 pm
Fri 6:30 am - 5:00 pm
Sat 6:30 am - 11:00 am
SunClosed

2191 Mowry Ave, Fremont, CA 945382191 Mowry Ave

4.46(582 reviews)

Lab testing

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I would 100% recommend this company to anyone wanting to check their health status. The process was incredibly easy and done through certified labs. The results are frequently back by the next day.

Labcorp

Open until 4:00 pm

Mon 7:00 am - 4:00 pm
Tue 7:00 am - 4:00 pm
Wed 7:00 am - 4:00 pm
Thu 7:00 am - 4:00 pm
Fri 7:00 am - 4:00 pm
SatClosed
SunClosed

2147 Mowry Ave, Fremont, CA 945382147 Mowry Ave

4.34(538 reviews)

Lab testing

I highly recommend for anyone thinking of getting tested. From start to finish the whole process was hassle free and and very professional. I had my results very quickly and discreetly couldn't be happier with the service.

Quest Diagnostics, Gilroy

Quest Diagnostics

Open until 4:30 pm

Mon 8:00 am - 4:30 pm
Tue 8:00 am - 4:30 pm
Wed 8:00 am - 4:30 pm
Thu 8:00 am - 4:30 pm
Fri 8:00 am - 4:30 pm
SatClosed
SunClosed

9360 No Name Uno, Gilroy, CA 950209360 No Name Uno

4.13(594 reviews)

Lab testing

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I was able to choose a Quest lab location and schedule an appointment. Check in was easy, and I only needed to provide my name and DOB. They were able to locate my order in their system. They were already aware that my labs were paid for prior to the appointment. I had my labs done on a Wednesday, and I received my results by Saturday. Great experience.

Labcorp

Open until 3:30 pm

Mon 7:00 am - 3:30 pm
Tue 7:00 am - 3:30 pm
Wed 7:00 am - 3:30 pm
Thu 7:00 am - 3:30 pm
Fri 7:00 am - 3:30 pm
SatClosed
SunClosed

700 W 6th St, Gilroy, CA 95020700 W 6th St

4.28(441 reviews)

Lab testing

I came in one day without an appoint and waited two hours as a walk-in before I had to leave without being tested. I made an appointment through Labcorp for the next day, showed up on time, got tested easily and was on my way in 15-20 minutes. Staff is friendly and helpful.