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  2. Postural orthostatic tachycardia syndrome - Wikipedia

    en.wikipedia.org/wiki/Postural_orthostatic...

    Postural orthostatic tachycardia syndrome (POTS) is a condition characterized by an abnormally large increase in heart rate upon sitting up or standing. [1] POTS is a disorder of the autonomic nervous system that can lead to a variety of symptoms, [10] including lightheadedness, brain fog, blurred vision, weakness, fatigue, headaches, heart palpitations, exercise intolerance, nausea ...

  3. Negative pressure ventilator - Wikipedia

    en.wikipedia.org/wiki/Negative_pressure_ventilator

    It used pressure from a tank of compressed oxygen to operate a valve system that alternately forced air into and out of a person's airway, using alternating positive and negative air pressure. Although portable, and able to be used by lay persons and non-medical emergency responders, some medical personnel criticized it as dangerous (in part ...

  4. Hydraulic accumulator - Wikipedia

    en.wikipedia.org/wiki/Hydraulic_accumulator

    As the volume of the compressed gas changes, the pressure of the gas (and the pressure on the fluid) changes inversely. For low pressure water system use the water usually fills a rubber bladder within the tank (pictured), preventing contact with the tank which would otherwise need to be corrosion resistant.

  5. Rival (consumer products company) - Wikipedia

    en.wikipedia.org/wiki/Rival_(consumer_products...

    The Rival Company is an American manufacturer of small appliances that produces products under the Bionaire, Crock-Pot, Fasco, Patton, Pollenex, Rival, Simer, and White Mountain brands. It became a wholly owned subsidiary of Holmes Products Corp. in 1999, and later became a brand of Sunbeam Products , a subsidiary of Jarden Corporation , which ...

  6. Pressure tank - Wikipedia

    en.wikipedia.org/wiki/Pressure_tank

    The diaphragm or bladder may itself exert a pressure on the water, but it is usually small and will be neglected in the following discussion. Case 1 is an empty tank at the charging pressure P c (gauge). The total volume of the tank is V t. Case 2 is a tank in use, with the air pressure at pressure P (gauge) and a water volume of V

  7. Portable oxygen concentrator - Wikipedia

    en.wikipedia.org/wiki/Portable_oxygen_concentrator

    As the pressure in the first cylinder drops the nitrogen is desorbed, the valve is closed, and the gas is vented into the ambient air. Most of the oxygen produced is delivered to the patient; part is fed back into the sieves (at greatly reduced pressure) to flush away left over nitrogen, and prepare the zeolite for the next cycle.