Blood pressure estimates

With lack of appropriate equipment in the field, simple vital sign assessments might become challenging tasks. Estimation of blood pressure in a patient in the wilderness environment is one example. Without sphygomomanometers, the closest clinical assessment one can do is to determine the presence of various pulses. The presence of a radial pulse denotes a systolic BP of at least 80 mmHg. The presence of a femoral pulse implies a systolic BP of at least 70 mmHg. A palpable carotid pulse implies a perfusing systolic BP of at least 60 mmHg. There have been arguments against these estimates as they can be sometimes unreliable. However, in the field without appropriate equipment, these are acceptable.