EKG AcquisitionCâu 46 / 100
A tracing shows the baseline slowly drifting up and down in a wave pattern that matches the patient's breathing. What should the technician check first?
a.Whether the machine is set to 50 mm/sec
b.Whether the electrodes are loose, dried out, or applied over lotion or oil
c.Whether the arm and leg electrodes are reversed
d.Whether the standardization is set to 20 mm/mV
Giải thích
A wandering baseline is usually caused by poor electrode contact from loose tabs, dried gel, body lotion, oils, or sweat, and it is also worsened by deep respiration or cable tension. The fix is to clean and dry the skin, apply fresh electrodes, and secure the lead wires. Paper speed and standardization change the size or spacing of the complexes, and lead reversal changes polarity rather than causing drift.
Luyện miễn phí toàn bộ 100 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- A 12-lead tracing shows an inverted P wave, inverted QRS, and inverted T wave in lead I, while the chest leads look normal. What is the most likely cause?
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- What does the standardization mark on an EKG tracing indicate when it is 10 mm tall?
- At the standard paper speed, how much time does one small box represent, and what is that speed?
- How much time and voltage does one large box on standard EKG paper represent?
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