GB2324246A - Pneumatic limb-exsanguination device - Google Patents

Pneumatic limb-exsanguination device Download PDF

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Publication number
GB2324246A
GB2324246A GB9707640A GB9707640A GB2324246A GB 2324246 A GB2324246 A GB 2324246A GB 9707640 A GB9707640 A GB 9707640A GB 9707640 A GB9707640 A GB 9707640A GB 2324246 A GB2324246 A GB 2324246A
Authority
GB
United Kingdom
Prior art keywords
pressure
sleeve
device
chamber
limb
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB9707640A
Other versions
GB9707640D0 (en
Inventor
Olarewaju James Olagbo Oladipo
Binod Prasad Shah
Original Assignee
Olarewaju James Olagbo Oladipo
Binod Prasad Shah
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Olarewaju James Olagbo Oladipo, Binod Prasad Shah filed Critical Olarewaju James Olagbo Oladipo
Priority to GB9707640A priority Critical patent/GB2324246A/en
Publication of GB9707640D0 publication Critical patent/GB9707640D0/en
Publication of GB2324246A publication Critical patent/GB2324246A/en
Application status is Withdrawn legal-status Critical

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61HPHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H9/00Pneumatic or hydraulic massage
    • A61H9/005Pneumatic massage
    • A61H9/0078Pneumatic massage with intermittent or alternately inflated bladders or cuffs
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/12Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
    • A61B17/132Tourniquets
    • A61B17/135Tourniquets inflatable
    • A61B17/1355Automated control means therefor

Abstract

The device comprises a sleeve shaped to fit the limb and divided into a series of spiral chamber segments each linked by a bi-directional valve which opens or closes depending upon the pressure gradient, the most distal segment having valve means for connection to a pressure source for enforced inflation and deflation. The device can be used to exsanguinate an extremity before the application of a tourniquet to create a bloodless field for surgery.

Description

Pneumatic Sequential Limb Exanguination Device Field of the invention The present invention relates to pressure devices for emptying venous blood, and prevention of arterial inflow into mammalian extremities in order to obtain a relatively bloodless operative field prior to surgical operations.

Description of Prior At Surgery on the extremities in mammals is usually associated with moderate amount of bleeding. This can sometimes be controlled by electrocautery. It is however difficult to control the oozing from the veins. This sometimes limit visualization of the operative field.

To limit the amount of bleeding into the operation field, the extremity is usually exanguinated prior to surgery. This generally involves forceful emptying of the venous blood flow, and decreasing arterial inflow with either the simple elevation of the extremity, or by forcibly encircling the extremity with an elasticated bandage, before the application of a tourniquet at the proximal portion of the limb.

This is sometimes inadequate in producing enough venous emptying and thereby reducing the amount of bleeding during surgery. The result sometimes depend on the force exerted during the process of encircling the extremity with an elasticated bandage.

Occasionally, the bandage will snap either due to the application of excessive force, or, to the alteration to the physical characteristics of the bandage as a result of repeated autoclaving. The elasticated bandage does not produce uniform compression of the extremity.

Essential Technical Details Applicants have found a device for applying sequential compressive pressure to a mammalian limb to enable venous emptying and occlusion of arterial inflow before the application of a tourniquet.

This device is made of a distensible sleeve, shaped to fit the shape of the extremity it is to be applied on. The sleeve can be shaped in form of a leg stocking, or a glove stocking extending proximally to a desired level of the extremity. The device is further divided into a series of spiral chamber segments each linked by a bi-directional valve which opens or closes once the inflating pressure in the preceding spiral chamber segment exceed a set pressure.

The various pressures and time duration can be pre-determined by a microprocessor incorporated in the pressure generating source, the details of which is obvious to those familiar with the trade. Precautionary measures to avoid excessive pressure developing in the sleeve is incorporated in the microprocessor. The sleeve chambers are such that they can withstand maximum distending pressure thrice the human physiological systolic pressure.

Compressive forces are produced from a pressure generating machine which has means of connecting to the distal end of the sleeve. The pressure pulses are generated in such a way that maximal pressure is first obtained in the most distal chamber thereby emptying venous blood in the distal part of the extremity. This then sequentially proceed to the more proximal segments of sleeve. The connecting valves between each spiral chamber segment prevents inversion or reversal of the pressure gradient.

The conduits connecting the pressure generating device to the distensible sleeve also serves as a pressure relief means, serving as an exhaust after the completion of limb exanguination, and the application ofthe tourniquet proximally in the extremity.

The sleeve design and the chamber configuration is of a spiral ladder-like chamber design. This is further separated into multiple spiral segments connected by a bidirectional valve. Pressure increment is from the most distal spiral chamber segment, and as the maximum pressure is reached in the most distal chamber, the bi-directional valve are forced open allowing sequential distension along the length of the extremity.

The sleeve designs have an optional design modification that exclude the most distal portion covering the hands and the feet, leaving a cylindrical segment. This is applicable in situations where there is severe involvement ofthe hands and feet such that application of pressure over the area will worsen the extent of the soft tissue injury.

The sleeves are also have a vent hole, an additional safety measure independent of the microprocessor to prevent excessive pressure developing in the chamber segments.

The sleeves are designed of different sizes to match different ages and limb sizes.

Further feature will become apparent in the following description of the embodiments of this invention, and the appended claims.

Claims (2)

1. A pneumatic limb exanguination device comprising of a distensible chamber sleeve shaped to fit mammalian extremities. The sleeve chamber subdivided into a series of spiral segments each connected by a bi < lirectional valve that opens or closes with alteration of pressure gradients. The most distal portion of the sleeve chamber is provided with a means to connect to a pressure generating machine to enable forced inflation and deflation gradient starting at the most distal sleeve chamber segment.
2. A pneumatic limb exanguination device as in Claim 1 wherein the sleeve chamber segments can withstand up to three times the physiological human systolic pressure, and are provided with additional safety vent holes or valves that prevents the development of excessive pressure more than thrice the physiological human systolic pressure.
GB9707640A 1997-04-15 1997-04-15 Pneumatic limb-exsanguination device Withdrawn GB2324246A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9707640A GB2324246A (en) 1997-04-15 1997-04-15 Pneumatic limb-exsanguination device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9707640A GB2324246A (en) 1997-04-15 1997-04-15 Pneumatic limb-exsanguination device

Publications (2)

Publication Number Publication Date
GB9707640D0 GB9707640D0 (en) 1997-06-04
GB2324246A true GB2324246A (en) 1998-10-21

Family

ID=10810833

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9707640A Withdrawn GB2324246A (en) 1997-04-15 1997-04-15 Pneumatic limb-exsanguination device

Country Status (1)

Country Link
GB (1) GB2324246A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1310492A (en) * 1968-12-05 1973-03-21 Flowtron Aire Ltd Apparatus for activating parts of the body
US4029087A (en) * 1975-10-28 1977-06-14 The Kendall Company Extremity compression device
GB1481125A (en) * 1974-01-14 1977-07-27 Meteve Ab Blood flow restrictor
GB2245497A (en) * 1990-07-05 1992-01-08 Huntleigh Technology Plc Inflatable apparatus with restricted flow between chambers

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1310492A (en) * 1968-12-05 1973-03-21 Flowtron Aire Ltd Apparatus for activating parts of the body
GB1481125A (en) * 1974-01-14 1977-07-27 Meteve Ab Blood flow restrictor
US4029087A (en) * 1975-10-28 1977-06-14 The Kendall Company Extremity compression device
GB2245497A (en) * 1990-07-05 1992-01-08 Huntleigh Technology Plc Inflatable apparatus with restricted flow between chambers

Also Published As

Publication number Publication date
GB9707640D0 (en) 1997-06-04

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)