BIOMEDICAL PROJECTS ABSTRACT-Digital pulmonary function test spirometry

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BIOMEDICAL PROJECTS ABSTRACT-Digital pulmonary function test spirometry

  1. 1. Digital Pulmonary Function Test – SpirometryABSTRACT:- Pulmonary function test is helpful in diagnosis lung diseases. Ithelps the doctor to detect the range of respiratory diseases. This test can behelpful to cure respiratory diseases if detected early. The simplest test isspirometry, which measures how fast the lungs can breath in and out, andalso the volume of air lung can exhaled in the first and second of test. Apeak flow meter can determine how much a patient’s airways havenarrowed. Our aim is to make a microcontroller based spirometer which displaysthe output in form of signals.Spirometry (meaning the measuring of breath) is the most common of thePulmonary Function Tests (PFTs), measuring lung function, specifically themeasurement of the amount (volume) and/or speed (flow) of air that can beinhaled and exhaled. Spirometry is an important tool used for generatingpneumotachograph to assessing conditions such as asthma, pulmonaryfibrosis, and COPD.The basic FVC test varies slightly depending on the equipment used.Generally, the patient is asked to take the deepest breath they can, and thenexhale into the sensor as hard as possible, for as long as possible. It issometimes directly followed by a rapid inhalation (inspiration), in particular
  2. 2. when assessing possible upper airway obstruction. Sometimes, the test willbe preceded by a period of quiet breathing in and out from the sensor (tidalvolume), or the rapid breath in (forced inspiratory part) will come before theforced exhalation.During the test, soft nose clips may be used to prevent air escaping throughthe nose. Filter mouthpieces may be used to prevent the spread ofmicroorganisms, particularly for inspiratory maneuvers.SENSOR: We have used a Turbine Flow sensor to measure the Tidal Volume. If air is blown into the sensor, the fan inside the sensor rotates and a proximity sensor kept nearby will generate an series of pulse signals, which is then amplified and given as a pulse input to the PIC Microcontroller for Display. For Eg: if the 7ml of gas goes to the rotor and rotor will give 1 pulse.so we have taken 1pulse=7ml.and as per the count we make program for microcontroller to count pulses.
  3. 3. Block Diagram: Alarm Alarm Driver Power PIC 16F877 Supply Microcontroller LCD Display Voltage Comparator Divider Proximity Sensor Sensor Air in  FAN Air Out 
  4. 4. Block Diagram: Alarm Alarm Driver Power PIC 16F877 Supply Microcontroller LCD Display Voltage Comparator Divider Proximity Sensor Sensor Air in  FAN Air Out 
  5. 5. Block Diagram: Alarm Alarm Driver Power PIC 16F877 Supply Microcontroller LCD Display Voltage Comparator Divider Proximity Sensor Sensor Air in  FAN Air Out 
  6. 6. Block Diagram: Alarm Alarm Driver Power PIC 16F877 Supply Microcontroller LCD Display Voltage Comparator Divider Proximity Sensor Sensor Air in  FAN Air Out 

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