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EP-3865080-B1 - AUTOMATIC CUFF IDENTIFICATION SYSTEM

EP3865080B1EP 3865080 B1EP3865080 B1EP 3865080B1EP-3865080-B1

Inventors

  • VASANDANI, Paresh M.
  • BARKER, DOUGLAS C.

Dates

Publication Date
20260506
Application Date
20210217

Claims (9)

  1. A system (100) comprising: a pneumatic cuff (110) with an integrated valve (115); a console (130) connectable to the pneumatic cuff (110), the console (130) comprising a processor (902) and memory (904, 906) including instructions (924), which when executed by the processor (902) cause the processor to: inflate the pneumatic cuff (110) through the integrated valve (115) past a threshold pressure such that the integrated valve (115) opens; receive sensor data indicative of a pressure curve during inflation of the pneumatic cuff (110); compare the pressure curve to stored pressure curves; determine a recommendation, based on the comparison, including verification of the type of pneumatic cuff (110); and output the recommendation to a user.
  2. The system (100) of claim 1, wherein the pneumatic cuff (110) is a tourniquet cuff, a deep vein thrombosis compression cuff, or a blood pressure cuff.
  3. The system (100) of claim 1, wherein the valve (115) comprises a valve system.
  4. The system (100) of claim 1, wherein the pneumatic cuff (110) is a child cuff or an adult cuff.
  5. The system (100) of claim 1, wherein the pneumatic cuff (110) is adapted for an arm or a leg.
  6. The system (100) of claim 1, wherein the valve (115) is a flap valve (300) adjacent a pressure bump (302), wherein the flap valve (300) is adapted to open past the pressure bump (302) at the threshold pressure.
  7. The system (100) of claim 1, wherein the valve (115) is a cross-slit valve (400) adapted to open at the threshold pressure.
  8. The system (100) of claim 1, wherein the valve is a z-shaped valve having a first side and a second side, and wherein the first side is adapted to open during inflation at a predetermined threshold pressure, and the second side is adapted to open during deflation, and wherein the valve further comprises a support member connecting the first side and the second side.
  9. The system (100) of claim 1, wherein the pneumatic cuff (110) is a tourniquet cuff and the threshold pressure comprises about 100 mm Hg to about 250 mm Hg.

Description

FIELD Exemplary embodiments relate to automatic cuff identification, and more particularly a system to output a recommendation to a user. BACKGROUND Pneumatic cuffs are used for a variety of medical purposes. The inflatable chamber(s) of pneumatic cuffs allow for application of pressure to patients around appendages for a variety of purposes. For example, pneumatic cuffs are used in conjunction with digital sphygmomanometers to measure patient blood pressure using the oscillometric method. The cuff is inflated to occlude the arterial blood flow, followed by deflation. As the cuff is deflated, the arterial pulsations cause pressure changes in the cuff that are sensed and analyzed to generate information such as mean arterial pressure, systolic pressure, diastolic pressure, and heart rate. Other pneumatic cuffs are used as tourniquet cuffs, often used in surgical settings, to apply uniform circumferential pressure around a limb or extremity at a desired location. This is done to occlude arterial blood flow following exsanguination to produce a relatively bloodless operative field and to minimize blood loss. Tourniquet cuffs generally include an inflatable chamber, but additionally include a stiffener, contact closures, and a stabilizer. The inflatable chamber holds pressurized gas around the extremity of interest. Still other pneumatic cuffs, such as deep vein thrombosis (DVT) compression cuffs are used to intermittently apply compression pressure around appendages. This increases blood flow through the deep veins and helps prevent blood clots. In any case, the pneumatic cuff is generally attached to a console or other monitor of a pneumatic control system that is configured to inflate and deflate the cuff as needed to a particular pressure. But there are a wide variety of pneumatic cuffs, in various types and sizes. The type and size of pneumatic cuff, and the pressure required to treat the patient, can vary on the design, medical procedure, and patient size and medical history. Errors in measurement may occur if an incorrect cuff is attached to the console, which may lead to incorrect pressure application and thereby less effective medical care. Thus, correct selection on the type, size, and brand of pneumatic cuff being used should be verified. US6171254B1 discloses a blood pressure monitoring system for automatic unattended operation uses curve fitting techniques determined during an initial inflation period to determine cuff size. Based upon cuff size, the number of important pre-determined operating parameters are determined for use in controlling the remaining blood pressure reading operations. WO2007/057639A1 discloses a pump that supplies pressurised air to inflate. compression or mattresses or cushions or similar at the desired times and to desired pressures appropriate to the therapy. The garments are each identified by very small steps generated in the pressure waveform during inflation, the identifying means consisting of a flat sheet valve in the connector chamber having several vents to atmosphere and comprising the main flow path from the pump to the garment(s). As the air flows through the connection tubing and through the connector a pressure wave is mechanically generated by the valve and fed back upstream to a pressure sensor in the pump. The shape of the pressure waveform relates to particular compression garment, the pump supplying the appropriate inflation regime upon detection of this pressure waveform. SUMMARY According to the invention, there is provided a system as set out in claim 1. Optional features are set out in the dependent claims. BRIEF DESCRIPTION OF THE DRAWINGS In the drawings, which are not necessarily drawn to scale, like numerals can describe similar components in different views. Like numerals having different letter suffixes can represent different instances of similar components. The drawings illustrate generally, by way of example, but not by way of limitation, various examples discussed in the present document. FIG. 1 illustrates a schematic diagram of a cuff system for medical use in accordance with some examples.FIG. 2 illustrates a schematic diagram of a valve for use in a cuff system in accordance with some examples.FIGS. 3A-3B illustrate schematic diagrams of a flap valve for use in a cuff system in accordance with some examples.FIGS. 4A-4C illustrates schematic diagrams of a cross-slit valve for use in a cuff system in accordance with some examples.FIGS. 5A-5D illustrates various views and schematics of a Z-valve for use in a cuff system in accordance with some examples.FIGS. 6A-6C illustrate flow charts depicting a method of detecting the type of cuff used in a medical application in accordance with some examples.FIG. 7 illustrates pressure curves for cuff systems in accordance with some examples.FIGS. 8A-8D illustrate pressure curves at different operating pressures for cuff systems in accordance with some examples.FIG. 9 illustrates a block diagram of an