At which body temperature does blood pressure become detectable only by Doppler in hypothermia victims?

In the context of hypothermia, as a person's body temperature drops significantly, vital physiological functions begin to slow down, which can impact the circulatory system. Blood pressure can become very weak and difficult to detect using conventional methods.

At around 91.4° F (33°C), blood pressure may not be accurately measurable with a standard sphygmomanometer due to the diminished circulation and reduced heart function. At this temperature, Doppler ultrasound becomes necessary to detect blood flow, as it can pick up the vibrations of blood flow rather than relying on the more traditional methods that depend on stronger pulses and blood pressure readings.

Recognizing this temperature threshold is crucial in emergency and medical settings, as it indicates a significant level of hypothermia that may require immediate advanced intervention to prevent further complications.