3/11/2024 0 Comments Lung percussion sounds![]() On expiration, the lower border of the lungs is at the level of the sixth rib at the midclavicular line and the eighth rib at the midaxiallary line anteriorly, approximately at the level of the T10 spinous process posteriorly. Repeat the percussion at four and five levels, comparing each lung level side by side, working up to the chest wall, starting at the inferior lung borders.The sound should be hollow, representing an air-filled lung. Use the tip of the middle finger (plexor finger) of the dominant hand to tap firmly on the top third (middle or distal phalanx) of the pleximeter finger of the non-dominant hand at least twice (it is advisable to keep fingernails short).Make sure the other fingers and palm are not pressed against the patient's chest.The firmer the finger is pressed to the chest wall, the louder the percussion note tends to be. Place non-dominant hand with middle finger (pleximeter finger) pressed and hyperextended firmly on the patient's right or left mid-back area (lower levels of lungs posteriorly).Percuss both posteriorly and anteriorly, starting on the back.Examining the posterior of the lung requires the patient to be leaning forward or sitting on the edge of the bed. Position the patient on the examination table at a 30- to 45-degree angle and approach from the right side. ![]()
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