Continuous non-invasive sphygmomanometer
First Claim
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1. A sphygmomanometer for continuous plethysmographic measurement of blood pressure, comprising:
- at least one inflatable pressure pad which is attachable to a body part containing an artery;
arterial signal sensors for determining arterial blood flow;
a valve-controlled pressure chamber connected to a gas source and to the inflatable pressure pad, having a pressure sensor for measuring the pressure in the pressure chamber or in the pressure pad; and
a computer, with valve control of the pressure chamber dependent on signals of the arterial signal sensors;
wherein the pressure chamber is fitted respectively with a separate inlet and outlet valves.
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Abstract
According to the invention a sphygmomanometer for continuous plethysmographic measurement of blood pressure includes at least one inflatable pressure pad which is attachable to a body part containing an artery, arterial signal sensors for determining arterial blood flow, and a valve-controlled pressure chamber connected to a gas source and to the inflatable pressure pad and including a pressure sensor for measuring the pressure in the pressure chamber or in the pressure pad. The pressure chamber has separate inlet and outlet valves which are controlled dependent on signals of the arterial signal sensors.
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Citations
31 Claims
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1. A sphygmomanometer for continuous plethysmographic measurement of blood pressure, comprising:
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at least one inflatable pressure pad which is attachable to a body part containing an artery;
arterial signal sensors for determining arterial blood flow;
a valve-controlled pressure chamber connected to a gas source and to the inflatable pressure pad, having a pressure sensor for measuring the pressure in the pressure chamber or in the pressure pad; and
a computer, with valve control of the pressure chamber dependent on signals of the arterial signal sensors;
wherein the pressure chamber is fitted respectively with a separate inlet and outlet valves. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 23, 24, 25, 26, 27)
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18. A sphygmomanometer for continuous plethysmographic measurement of blood pressure, comprising:
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at least one inflatable pressure pad which is attachable to a body part containing an artery;
arterial signal sensors for determining arterial blood flow;
a valve-controlled pressure chamber connected to a gas source and to the inflatable pressure pad, having a pressure sensor for measuring the pressure in the pressure chamber or in the pressure pad; and
a computer, with valve control of the pressure chamber dependent on signals of the arterial signal sensors;
wherein at least one arterial signal sensor is machined into the side of the pressure pad facing away from the body; and
wherein the pressure pad is separated by at least one mouldable septum into separate areas, which areas are filled with different media, for example gas or fluid, with at least one arterial signal sensor being assigned to one of the separate areas.- View Dependent Claims (19, 20, 21, 22)
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28. A sphygmomanometer for continuous plethysmographic measurement of blood pressure, comprising:
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at least one inflatable pressure pad which is attachable to a body part containing an artery;
arterial signal sensors for determining arterial blood flow;
a valve-controlled pressure chamber connected to a gas source and to the inflatable pressure pad, having a pressure sensor for measuring the pressure in the pressure chamber or in the pressure pad; and
a computer with valve control of the pressure chamber dependent on signals of the arterial signal sensors;
wherein the pressure chamber comprises a separate inlet valve and a separate outlet valve; and
wherein several arterial signal sensors are provided, from which the computer searches out and controls the arterial signal sensor(s) with the best signal characteristic.
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29. A sphygmomanometer for continuous plethysmographic measurement of blood pressure, comprising:
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at least one inflatable pressure pad which is attachable to a body part containing an artery;
arterial signal sensors for determining arterial blood flow;
a valve-controlled pressure chamber connected to a gas source and to the inflatable pressure pad, having a pressure sensor for measuring the pressure in the pressure chamber or in the pressure pad; and
a computer, with valve control of the pressure chamber dependent on signals of the arterial signal sensors;
wherein the pressure chamber comprises a separate inlet valve and a separate outlet valve; and
wherein only one sector of a rigid outer wall of the pressure pad, containing the arterial signal sensors, is lined with a mouldable membrane.
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30. A sphygmomanometer for continuous plethysmographic measurement of blood pressure, comprising:
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at least one inflatable pressure pad which is attachable to a body part containing an artery;
arterial signal sensors for determining arterial blood flow;
a valve-controlled pressure chamber connected to a gas source and to the inflatable pressure pad, having a pressure sensor for measuring the pressure in the pressure chamber or in the pressure pad; and
a computer, with valve control of the pressure chamber dependent on signals of the arterial signal sensors;
wherein the pressure chamber comprises a separate inlet valve and a separate outlet valve; and
wherein the arterial signal sensors are applied at an angle of about 120°
to one another.
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31. A sphygmomanometer for continuous plethysmographic measurement of blood pressure, comprising:
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at least one inflatable pressure pad which is attachable to a body part containing an artery;
arterial signal sensors for determining arterial blood flow;
a valve-controlled pressure chamber connected to a gas source and to the inflatable pressure pad, having a pressure sensor for measuring the pressure in the pressure chamber or in the pressure pad; and
a computer, with valve control of the pressure chamber dependent on signals of the arterial signal sensors;
wherein the pressure chamber comprises a separate inlet valve and a separate outlet valve; and
wherein the pressure sensor of the pressure chamber is a differential pressure sensor, whose one part is connected to the interior of the pressure chamber or to the pressure pad and whose other part is connected to a fluid-filled line.
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Specification