Peak flow meter and the appointment of its main indicators


1. When appointed?

2. Contraindications

3. How to prepare?

peak flow meter is a method of cross-functional study of the bronchi and upper respiratory tract.The procedure makes it possible to diagnose asthma, as well as to detect violations patency in small, medium and large bronchi, trachea at an early stage.

peak flow meter is performed using a peak flow meter (spirometer), through which the patient needs to be done a couple of breaths with maximum effort.It helps calculate the highest air velocity, as well as to assess the patency of the upper airway.The procedure is inherently a very close to spirogram forced expiratory.

Evaluation indicators of forced exhalation is of great importance in medical practice, since it provides comprehensive data for the differential diagnosis of bronchial obstruction.

Execution procedures:

  1. The patient sits in a chair and puts his hands on the armrests.
  2. At peak flow meter is put on a disposable mouthpiece, and on the patient's nose - a
    nose clip.
  3. Next patient makes several quiet breaths, and then performs a forced inspiration and forced exhalation (not holding my breath).Then these manipulations are repeated several times.

If during pneumotachometry appeared cough, the study interrupted for a few minutes.The appearance of chest pain or hemoptysis requires immediate cessation pneumotachometry.

Upon completion of the examination the doctor analyzes the performance and formulate a conclusion.

pneumotachometry The main indicators are:

  • FVC (forced vital capacity).
  • Index Tiffno.
  • POSvyd (peak volume rate of forced expiratory).
  • ISO 25, 50, 75 (the maximum volume of air velocity at the expiration of 25, 50 and 75% of FVC).
  • SOS 25-75 (mean forced expiratory volume velocity).

on indicators tend to affect height, age and physical development.

When he appointed?

main indications for purpose pneumotachometry considered:

  • Observation of patients with respiratory diseases.
  • diagnosis of pathologies involving the characteristic features (shortness of breath, prolonged cough).
  • control of the therapy in a patient with COPD (chronic obstructive pulmonary disease) and asthma.
  • Preparation of patients with bronchopulmonary diseases to surgical interventions.
  • Determination of patient disability.

Contraindications The main contraindications to spirometry are:

  • Epilepsy.
  • aneurysm of the aorta or other arteries.
  • Hypertensive crisis.
  • Myocardial infarction, which was recently transferred to the patient.
  • hemorrhagic or ischemic stroke, myocardial less than three months ago.
  • Severe airway obstruction.
  • infectious disease of the upper respiratory tract, transferred less than two weeks ago.
  • Pregnancy.

How to prepare?

One day before the study the patient should stop smoking and drinking alcohol.Four hours before the procedure (after consultation with the doctor) the patient should stop taking short-acting bronchodilators.If the patient uses the inhaler, it is advisable to take with you.Half an hour before pneumotachometry need to eliminate all active exercise and sit in a relaxed atmosphere.

peak flow meter is performed on an empty stomach or two hours after a meal.The patient must be in possession of a handkerchief.

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