Pressure Relief Valve for Blood Pressure Cuff

A blood pressure measurement device comprising:

• a cuff configured to wrap around a limb of a user;
• a bladder coupled to the cuff and configured to compress the limb when inflated;
• a pump operative to inflate the bladder;
• and
• a valve comprising:
• a housing;
• a diaphragm contained within the housing and operative to:
• in a first state, allow the pump to inflate the bladder;
• and
• in a second state, release air from the bladder at a first rate;
• and
• a vent configured to continuously release the air from the bladder at a second rate that is less than the first rate.

A blood pressure measurement device comprising:

• a cuff configured to wrap around a limb of a user;
• a bladder coupled to the cuff and configured to compress the limb when inflated;
• a pump operative to inflate the bladder;
• and
• a valve comprising:
• a housing defining an outlet that couples the bladder to an external environment;
• and
• a diaphragm contained within the housing, comprising an air permeable material, and operative to:
• in a first state, block the outlet and allow air to vent through the air permeable material;
• and
• in a second state, allow the air in the bladder to vent from the outlet.