Tourniquet for sensing and regulation of applied pressure
First Claim
1. A tourniquet system comprising:
- an inflatable occlusive band for encircling a limb of a subject and for inflating to apply pressure to the encircled limb to occlude blood flow into the limb distal to the band wherein an inner surface of the band faces the limb;
inflation pressure control means for controlling the pressure to which the occlusive band is inflated and for producing an inflation pressure signal representative of the pressure to which the band is inflated; and
applied pressure sensing means located at a predetermined location fixed relative to the band for producing an applied pressure signal representative of the pressure applied by the inflated band to the limb in a direction normal to inner surface of the band at the predetermined location.
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Accused Products
Abstract
A tourniquet system comprising: an inflatable occlusive band for encircling a limb of a subject and for inflating to apply pressure to the encircled limb to occlude blood flow into the limb distal to the band, wherein an inner surface of the band faces the limb; inflation pressure regulation means responsive to a variable inflation pressure regulation signal for regulating the pressure to which the occlusive band is inflated and for producing an inflation pressure signal representative of the pressure to which the band is inflated; applied pressure sensing means located at a predetermined location fixed relative to the band for producing an applied pressure signal representative of the pressure applied by the inflated band to the limb in a direction normal to inner surface of the band at the predetermined location; and pressure-regulating means responsive to the applied pressure signal for producing an inflation pressure regulation signal to maintain the pressure applied by the inflated band to the limb at the predetermined location near a predetermined reference pressure. The tourniquet system may include pressure comparison means for comparing the difference between the pressures represented by the inflation pressure signal and the applied pressure signal and for and generating an alarm signal if the difference exceeds a preassigned limit.
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Citations
16 Claims
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1. A tourniquet system comprising:
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an inflatable occlusive band for encircling a limb of a subject and for inflating to apply pressure to the encircled limb to occlude blood flow into the limb distal to the band wherein an inner surface of the band faces the limb; inflation pressure control means for controlling the pressure to which the occlusive band is inflated and for producing an inflation pressure signal representative of the pressure to which the band is inflated; and applied pressure sensing means located at a predetermined location fixed relative to the band for producing an applied pressure signal representative of the pressure applied by the inflated band to the limb in a direction normal to inner surface of the band at the predetermined location. - View Dependent Claims (2, 3)
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4. A tourniquet system comprising:
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an inflatable occlusive band for encircling a limb of a subject and for inflating to apply pressure to the encircled limb to occlude blood flow into the limb distal to the band, wherein an inner surface of the band faces the limb; inflation pressure regulation means responsive to a variable inflation pressure regulation signal for regulating the pressure to which the occlusive band is inflated and for producing an inflation pressure signal representative of the pressure to which the band is inflated; applied pressure sensing means located at a predetermined location fixed relative to the band for producing an applied pressure signal representative of the pressure applied by the inflated band to the limb in a direction normal to inner surface of the band at the predetermined location; and pressure-regulating means responsive to the applied pressure signal for producing an inflation pressure regulation signal to maintain the pressure applied by the inflated band to the limb at the predetermined location near a predetermined reference pressure. - View Dependent Claims (5, 6, 7)
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8. A tourniquet system comprising:
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an inflatable occlusive band for encircling a limb of a subject and for inflating to apply a plurality of pressures to the encircled limb to occlude blood flow into the limb distal to the band, wherein an inner surface of the band faces the limb; inflation pressure control means for controlling the pressure to which the occlusive band is inflated and for producing an inflation pressure signal representative of the pressure to which the band is inflated; and applied pressure sensing means located at a plurality of predetermined locations fixed relative to the band for producing a plurality of applied pressure signals representative of the plurality of pressures applied by the inflated band to the limb in a direction normal to inner surface of the band at the predetermined locations. - View Dependent Claims (9, 10, 11, 12)
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13. A tourniquet system comprising:
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an inflatable occlusive band for encircling a limb of a subject and for inflating to apply pressure to the encircled limb to occlude blood flow into the limb distal to the band, wherein an inner surface of the band faces the limb; inflation pressure regulation means responsive to a variable pressure regulation signal for regulating the pressure to which the occlusive band is inflated and for producing an inflation pressure signal representative of the pressure to which the band is inflated; applied pressure sensing means located at a plurality of predetermined locations fixed relative to the band for producing a plurality of applied pressure signals representative of the plurality of pressures applied by the inflated band to the limb in a direction normal to the inner surface of the band at the predetermined locations; pressure selection and regulating means responsive to the plurality of applied pressure signals for selecting an applied pressure signal and for producing an inflation pressure regulation signal to maintain the pressure applied by the inflated band to the limb at the predetermined location near a predetermined reference pressure. - View Dependent Claims (14, 15, 16)
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Specification