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Research and evaluation of the functional state of the respiratory system

Objective: to master the methods for determining the functional state of the respiratory system; evaluate the functional capabilities of the respiratory system and study the body's resistance to excess carbon dioxide.

Content



1. Examine and evaluate the state of the respiratory system. To do this, define:

1.1. resistance of the respiratory center to an excess of carbon dioxide (Stange test with breath holding on inhalation);

1.2. the body's resistance to excess carbon dioxide (sample Consistent with breath holding on exhalation);

2. Examine and evaluate your body’s resistance to excess carbon dioxide (CO2). To do this, determine the indicator of your body's resistance to excess CO2.

3. Determine the degree of development of the external respiration system (Pzhiz.)

4. Examine the compliance of the actual VC with due and endurance of your respiratory muscles, for which perform a Rosenthal test.

5. Identify and evaluate the functional reserves of the cardiorespiratory system of your body.

6. Determine the state of the circulatory system and respiration and identify the contingent of people to whom you belong on this indicator (Serkin's test).



Guidelines for implementation

laboratory work



1. Perform laboratory work “Research and evaluation of the state of the respiratory system”

1.1. Stange test (determination of the resistance of the respiratory center to excess carbon dioxide)

Working process. In a sitting position after 2-3 calm breathing movements, take a deep breath and hold your breath. In this case, the mouth must be closed, and the nose is clamped with fingers or a clip. Using a stopwatch, measure the maximum possible arbitrary breath holding time.

If the breath holding time is less than 40 seconds, then the resistance of your respiratory center to excess carbon dioxide (CO2) is unsatisfactory, 40-50 is satisfactory, and over 50 seconds is good.

1.2. Soobrae test (determination of the body's resistance to excess carbon dioxide)

The resistance of the body to an excess of carbon dioxide allows you to determine samples with holding your breath (apnea).

Working process. In a sitting position, after two or three calm breathing movements, exhale and hold your breath, holding your nose with your fingers. Use a stopwatch to record the most arbitrary expiratory holding time. In healthy children and adolescents, the breath holding time is 12 to 13 seconds. Adult healthy, untrained individuals can hold their breath while exhaling for 20 to 30 seconds, and healthy athletes for 30 to 90 seconds.

If you exhale apnea for less than 25 seconds, then the body’s resistance to excess CO2 is unsatisfactory, 25–40 is satisfactory, and over 40 seconds is good.

2. Determination of the indicator of the body's resistance to excess carbon dioxide

Working process. While standing, count the heart rate by heart rate for a minute. Considering the obtained heart rate data and the time of holding the breath on the exhale (Soobrae test), calculate the indicator of the body's resistance (PU) to excess carbon dioxide by the formula: PU = heart rate (bpm): apnea duration (sec)

Write on the board the results of the students of the group, compare them and draw a conclusion about the stability of your body to an excess of CO2.

The lower the value of the indicator, the higher the body's resistance to excess CO2.

3. Perform laboratory work “Research and evaluation of the morphological criterion for the degree of development of the external respiration system”

The degree of development of the external respiration system is determined by calculating the vital indicator (Life):

The average vital indicators for men are 65-70 cm3 / kg, for women - not less than 55-60 cm3 / kg.

4. Perform laboratory work “Determining the correspondence of the actual VC with due and endurance of the respiratory muscles”

4.1. Determination of compliance of the actual VC with due

Working process. Set the dry spirometer scale to zero. After two or three deep breaths and exhalations, take a maximum breath and make a uniform, maximum exhalation into the spirometer.
Repeat the measurement three times, record the maximum result.

Compare the obtained data with the proper lung capacity (JEL), which is calculated by the formulas:

JEL (men) = [height (cm) x 0.052 - age (years) x 0.022] - 3.60

JEL (women) = [height (cm) x 0.041 - age (years) x 0.018] - 2.68

Normally, the value of VC may deviate from the VC in the range of +20%. An increase in the actual value of VCs relative to JCL indicates high morphological and functional capabilities of the lungs.

4.2. Determination of endurance of the respiratory muscles (Rosenthal test)

Working process. Using a dry spirometer every 15 seconds, measure the VC value five times. The results obtained with each measurement, enter in table 17. Follow the dynamics of the VC and make a conclusion about the endurance of your respiratory muscles. Depending on the functional state of the musculoskeletal system of the system of external respiration, blood circulation and the nervous system, the value of VC during different measurements behaves differently. So, with good endurance of the respiratory muscles, VC increases, with satisfactory stays the same, and with unsatisfactory endurance decreases.

Table 17

ROSENTHAL TEST RESULTS



Full Name______________________________________



5. Perform laboratory work “Research and evaluation of the functional reserves of the cardio-respiratory system of the body”

5 . 1. Definition of the Skibinskaya Index (IS)

Working process. After a 5-minute rest in a sitting position, determine the heart rate, beats / min, VC, in ml and after 5 minutes, the duration of the breath-holding (ZD) after a calm breath, in sec. Using the formula, calculate the IP:

IS = 0.01 VC x HR / HR

Evaluate the results obtained using table 18. Make a conclusion about the functional reserves of the cardiorespiratory system. Your body. Compare the obtained data with lifestyle features (smoking, the habit of drinking strong tea, coffee, physical inactivity, etc.) or with the presence of diseases.

Table 18



ASSESSMENT OF FUNCTIONAL RESERVES OF THE CARDIO-RESPIRATORY

SKIBINSKY INDEX SYSTEMS



5.2. Serkin's test

Working process. In a sitting position after 2-3 calm respiratory movements, inhale and hold your breath, holding your nose with your fingers. Use a stopwatch to record the most arbitrary breath holding time during inspiration (1 phase, rest). Do 20 squats in 30 seconds and also determine the length of breath holding on inhalation (phase II, after 20 squats). While standing, rest for 1 minute and repeat the determination of the length of breath holding on inhalation in a sitting position (phase III, after resting in a sitting position). Enter the results in table 19.



Table 19



Duration of Arbitrary Breath Delay



Full Name _________________________________________



Evaluate the results obtained using table 20. Determine the category of subjects to which you belong according to the state of the cardiorespiratory system. Make a conclusion about the reasons why you are assigned to one or another category of subjects. Compare the obtained data with lifestyle features (smoking, lack of exercise, etc.) or with the presence of diseases.

Table 20

ASSESSMENT OF RESULTS OF THE SERKIN SAMPLE

5. Analyze the data obtained during all laboratory work. Based on the analysis of the results obtained, indicate the resistance of your body to excess carbon dioxide, the category of examinees, to which you belong according to the cardio-respiratory system (data from Serkin's test), the state of endurance of the respiratory muscles. Make a conclusion about the functional reserves of the cardio-respiratory system of your body.
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