CA2133074A1 - Exsanguinating to prepare extremity for anesthetic - Google Patents
Exsanguinating to prepare extremity for anestheticInfo
- Publication number
- CA2133074A1 CA2133074A1 CA002133074A CA2133074A CA2133074A1 CA 2133074 A1 CA2133074 A1 CA 2133074A1 CA 002133074 A CA002133074 A CA 002133074A CA 2133074 A CA2133074 A CA 2133074A CA 2133074 A1 CA2133074 A1 CA 2133074A1
- Authority
- CA
- Canada
- Prior art keywords
- extremity
- sleeve
- pneumatic
- undersleeve
- patient
- 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.)
- Abandoned
Links
- 230000003444 anaesthetic effect Effects 0.000 title claims description 4
- 239000008280 blood Substances 0.000 claims abstract description 15
- 210000004369 blood Anatomy 0.000 claims abstract description 15
- 239000003589 local anesthetic agent Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 5
- 230000000295 complement effect Effects 0.000 claims description 3
- 229920002457 flexible plastic Polymers 0.000 claims description 3
- 208000015181 infectious disease Diseases 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 abstract description 7
- 230000008321 arterial blood flow Effects 0.000 abstract description 3
- 238000003780 insertion Methods 0.000 abstract 1
- 230000037431 insertion Effects 0.000 abstract 1
- 210000003414 extremity Anatomy 0.000 description 16
- 206010052428 Wound Diseases 0.000 description 2
- 238000001990 intravenous administration Methods 0.000 description 2
- 229920012485 Plasticized Polyvinyl chloride Polymers 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 210000001364 upper extremity Anatomy 0.000 description 1
Landscapes
- Surgical Instruments (AREA)
Abstract
2133074 9319676 PCTABS00027 A medically useful two piece system and method for driving venous blood from a patient's extremity to prepare the same for administration of local anesthetic. The first piece is a flexible protective undersleeve (30) and the second a flexible pneumatic outer sleeve (10). Both sleeves have a closed end and an open end for insertion of the body extremity. The protective sleeve (30) is first applied over the body extremity followed by deflated pneumatic outer sleeve (10). The pneumatic sleeve is then inflated to drive venous blood from the extremity; a tourniquet, which may be the well known proximal (52) and distal (54) cuffs is applied to disrupt arterial blood flow. The pneumatic sleeve (10) is then deflated and removed from the upper body extremity as is the protective undersleeve (30) prior to the administration of local anesthetic.
Description
EXSANGUINATING TO PREPARE EXTREMITY FOR ANESTHETIC
TECHNICAL FIELD
The device and method of this invention relates to a system for driving blood from a patient's body extremity or limb to prepare same for a local anesthetic.
BACKGROUND ART
Many pneumatic sleeves, for different medical purposes, have been disclosed in the art.
Of these it is thought that the device disclosed by Vijil-Rosales in U.S. 4,781,181, issued 1 NOvember, 1988 most closely represents the state of the art prior to the instant invention. Specifically, Vijil-Rosales discloses a device for exsanguinating a limb using several inflatable bladders similar to sphymometer cuffs which surround the limb. The baldders are inflated to evacuate blood from the limb. This device, although functional, does not reflect on the single inflatable sleeve of the instant invention.
DISCLOSURE OF INVENTION
The object of the invention is to provide a simple device to both protect the medical clinician to avoid contact with open wounds or previously emplaced intravenous devices on a patient's extrimity and to reliably empty the extrimity of venous blood with less pain to the patient.
The instant invention is essentially a two-piece system, the two pieces being a pneumatic sleeve and a protective undersleeve. The sleeves are flexible to conform to the patient's extremity and the protective undersleeve protects the clinician form infection. The diameter and length of both sleeves are determined by the patient's size so as to be easily applied to the patient's extremity without interfering with open wounds or previously emplaced intravenous devices.
BRIEF DESCRIPTIONS OF THE DRAWING
FIG. 1 is a broken away axial section view of a pneumatic sleeve that is a component of a system embodying the invention;
FIG. 2 is a longitudinal axial elevation of an undersleeve that is another component of the system;
FIG. 3 is a view similar to FIG. 1 but showing a modified pneumatic sleeve that is a component of a modified system embodying the invention and also showing the modified pneumatic sleeve connected to a source of air pressure, and further showing proximal and distal cuffs.
MODE(S) FOR CARRYING OUT THE INVENTION
The inventive system comprises a conformable pneumatic sleeve and a conformable disposable undersleeve.
Pneumatic sleeve 10 FIG. 1 shown and described in its inflated condition, has an inner cylindrical wall 12 and an outer cylindrical wall 14 coaxial with wall 12. Sleeve 10 has an imperforate closed end 16 closing surfaces 12 and 14. Sleeve 10 also has a handle 18 afffixed to and protruding from closed end 16. Handle 18 has finger holes 20 which facilitate manipulating sleeve 10 and which also provide means for hanging sleeve 10 from a support.
Sleeve 10 is of flexible material such as plasticized polyvinyl chloride elastomer and may contain fabric reinforcement.
Pneumatic sleeve 10 also has an open end 22 at the axial end remote from closed end 16. Inner and outer cylindrical walls 12 and 14 are sealed together at open end 22, thereby to create an annular sealed chamber 24 between inner and outer cylindrical walls 12 and 14 and extending from closed end 16 to open end 22.
Lastly, pneumatic sleeve 10 has an air valve 26 in outer wall 4 at a location spaced from ends 16 and 22 but somewhat closer to end 22. Valve 26 has a lever 28 that is movable between a closed position and an open position in which sleeve 10 can be inflated or deflated. When deflated sleeve 10 is more or less collapsed for ease of installation.
A protective undersleevce 30 is illustrated in FIG. 2.
Undersleeve 30 is another component of the system and is also of flexible material such as known suitable flexible plastic or elastomeric materials. Undersleeve 30, which is generally cylindrical, is closed at one end 32 and its open at end 34. Undersleeve 30 is disposable.
The system presented by sleeves 10 and 30 is for use in preparing an upper extremity of a patient for local anesthetic. To accomplish this, the proximal and distal cuffs are applied to the patient's extremity nearest the torso. Undersleeve 30 is applied over the extremity and pneumatic sleeve 10 is applied over undersleeve 30. Air is pumped into valve 26 (with lever 28 in the open position) and into sealed chamber 24 to inflate sleeve 10 to a pressure in excess of the pressure of the venous blood to drive the same from the extremity. When venous blood is driven from the patient's extremity, the proximal and distal cuffs are inflated to disrupt arterial blood flow. Pneumatic sleeve 10 is deflated. It and undersleeve 30 are removed prior to administration of local anesthetic, such as a Bier Block.
As mentioned, sleeves 10 and 30 are flexible and thus conform readily to the extremity, while protective undersleeve 30 protects the clinician from infection.
Also, the inventive system appears to offer significant saving in clinicians' time, more reliable emptying of venous blood together with less pain to the patient.
FIG. 3 shows a modified pneumatic sleeve 50 many parts of which are the same as corresponding parts of pneumatic sleeve 10, the parts bearing the same reference nemerals being the same.
FIG. 3 also illustrates well known proximal 52 and distal cuffs 54. Each of cuffs 52 and 54 has two inlets/outlets 56 in the form of protruding tubes. Inlets/outlets 56 are controlled by a monitor/pressure machine (not shown). The patient's extremity is raised, proximal cuff 52 is placed and distal cuff 54 is placed.
Disposable undersleeve 30 is pulled over the patient's extremity and pneumatic sleeve 50 is pulled over undersleeve 30 and inflated by pumping air through a hose 58 and through valve 26 and into sealed chamber 24.
Pneumatic sleeve 50 is provided with a pair of slits 60 that are parallel to the axis of sleeve 50 and in open communication with open end 22 and adapted to receive therein inlets/outlets 56 of cuffs 52 and 54, with an inlet/outlet 56 of each of cuffs 52 and 54 being in each slit 60, and with pneumatic sleeve 50 covering cuffs 52 and 54. Pneumatic sleeve 50 is also provided with two flaps 62 with hook and loop fastener thereon.
Complementary hook and loop elements 64 art provided on pneumatic sleeve 50 to engage the hook and loop fasteners on flaps 62 to hold pneumatic sleeve 50 in surrounding relationship with cuffs 52 and 54. Flaps 62 are spaced from each other, so that inlets/outlets 56 of proximal cuff 52 will lie between flaps 62 when flaps 62 are in engagement with complementary hook and loop elements 64.
After pneumatic sleeve 50 is inflated as aforesaid, forcing the venous blood from the extremity, the proximal and distal cuffs are inflated to disrupt arterial blood flow. When this is complete the pneumatic sleeve 50 and undersleeve 30 are removed. Local anesthetic is then infuesed to effect a Bier Block.
It is evident that the inventive system attains the stated objects and advantages, among others.
The disclosed details are exemplary only and are not to be taken as limitations on the invention, except as those details may be included in the appended claims.
TECHNICAL FIELD
The device and method of this invention relates to a system for driving blood from a patient's body extremity or limb to prepare same for a local anesthetic.
BACKGROUND ART
Many pneumatic sleeves, for different medical purposes, have been disclosed in the art.
Of these it is thought that the device disclosed by Vijil-Rosales in U.S. 4,781,181, issued 1 NOvember, 1988 most closely represents the state of the art prior to the instant invention. Specifically, Vijil-Rosales discloses a device for exsanguinating a limb using several inflatable bladders similar to sphymometer cuffs which surround the limb. The baldders are inflated to evacuate blood from the limb. This device, although functional, does not reflect on the single inflatable sleeve of the instant invention.
DISCLOSURE OF INVENTION
The object of the invention is to provide a simple device to both protect the medical clinician to avoid contact with open wounds or previously emplaced intravenous devices on a patient's extrimity and to reliably empty the extrimity of venous blood with less pain to the patient.
The instant invention is essentially a two-piece system, the two pieces being a pneumatic sleeve and a protective undersleeve. The sleeves are flexible to conform to the patient's extremity and the protective undersleeve protects the clinician form infection. The diameter and length of both sleeves are determined by the patient's size so as to be easily applied to the patient's extremity without interfering with open wounds or previously emplaced intravenous devices.
BRIEF DESCRIPTIONS OF THE DRAWING
FIG. 1 is a broken away axial section view of a pneumatic sleeve that is a component of a system embodying the invention;
FIG. 2 is a longitudinal axial elevation of an undersleeve that is another component of the system;
FIG. 3 is a view similar to FIG. 1 but showing a modified pneumatic sleeve that is a component of a modified system embodying the invention and also showing the modified pneumatic sleeve connected to a source of air pressure, and further showing proximal and distal cuffs.
MODE(S) FOR CARRYING OUT THE INVENTION
The inventive system comprises a conformable pneumatic sleeve and a conformable disposable undersleeve.
Pneumatic sleeve 10 FIG. 1 shown and described in its inflated condition, has an inner cylindrical wall 12 and an outer cylindrical wall 14 coaxial with wall 12. Sleeve 10 has an imperforate closed end 16 closing surfaces 12 and 14. Sleeve 10 also has a handle 18 afffixed to and protruding from closed end 16. Handle 18 has finger holes 20 which facilitate manipulating sleeve 10 and which also provide means for hanging sleeve 10 from a support.
Sleeve 10 is of flexible material such as plasticized polyvinyl chloride elastomer and may contain fabric reinforcement.
Pneumatic sleeve 10 also has an open end 22 at the axial end remote from closed end 16. Inner and outer cylindrical walls 12 and 14 are sealed together at open end 22, thereby to create an annular sealed chamber 24 between inner and outer cylindrical walls 12 and 14 and extending from closed end 16 to open end 22.
Lastly, pneumatic sleeve 10 has an air valve 26 in outer wall 4 at a location spaced from ends 16 and 22 but somewhat closer to end 22. Valve 26 has a lever 28 that is movable between a closed position and an open position in which sleeve 10 can be inflated or deflated. When deflated sleeve 10 is more or less collapsed for ease of installation.
A protective undersleevce 30 is illustrated in FIG. 2.
Undersleeve 30 is another component of the system and is also of flexible material such as known suitable flexible plastic or elastomeric materials. Undersleeve 30, which is generally cylindrical, is closed at one end 32 and its open at end 34. Undersleeve 30 is disposable.
The system presented by sleeves 10 and 30 is for use in preparing an upper extremity of a patient for local anesthetic. To accomplish this, the proximal and distal cuffs are applied to the patient's extremity nearest the torso. Undersleeve 30 is applied over the extremity and pneumatic sleeve 10 is applied over undersleeve 30. Air is pumped into valve 26 (with lever 28 in the open position) and into sealed chamber 24 to inflate sleeve 10 to a pressure in excess of the pressure of the venous blood to drive the same from the extremity. When venous blood is driven from the patient's extremity, the proximal and distal cuffs are inflated to disrupt arterial blood flow. Pneumatic sleeve 10 is deflated. It and undersleeve 30 are removed prior to administration of local anesthetic, such as a Bier Block.
As mentioned, sleeves 10 and 30 are flexible and thus conform readily to the extremity, while protective undersleeve 30 protects the clinician from infection.
Also, the inventive system appears to offer significant saving in clinicians' time, more reliable emptying of venous blood together with less pain to the patient.
FIG. 3 shows a modified pneumatic sleeve 50 many parts of which are the same as corresponding parts of pneumatic sleeve 10, the parts bearing the same reference nemerals being the same.
FIG. 3 also illustrates well known proximal 52 and distal cuffs 54. Each of cuffs 52 and 54 has two inlets/outlets 56 in the form of protruding tubes. Inlets/outlets 56 are controlled by a monitor/pressure machine (not shown). The patient's extremity is raised, proximal cuff 52 is placed and distal cuff 54 is placed.
Disposable undersleeve 30 is pulled over the patient's extremity and pneumatic sleeve 50 is pulled over undersleeve 30 and inflated by pumping air through a hose 58 and through valve 26 and into sealed chamber 24.
Pneumatic sleeve 50 is provided with a pair of slits 60 that are parallel to the axis of sleeve 50 and in open communication with open end 22 and adapted to receive therein inlets/outlets 56 of cuffs 52 and 54, with an inlet/outlet 56 of each of cuffs 52 and 54 being in each slit 60, and with pneumatic sleeve 50 covering cuffs 52 and 54. Pneumatic sleeve 50 is also provided with two flaps 62 with hook and loop fastener thereon.
Complementary hook and loop elements 64 art provided on pneumatic sleeve 50 to engage the hook and loop fasteners on flaps 62 to hold pneumatic sleeve 50 in surrounding relationship with cuffs 52 and 54. Flaps 62 are spaced from each other, so that inlets/outlets 56 of proximal cuff 52 will lie between flaps 62 when flaps 62 are in engagement with complementary hook and loop elements 64.
After pneumatic sleeve 50 is inflated as aforesaid, forcing the venous blood from the extremity, the proximal and distal cuffs are inflated to disrupt arterial blood flow. When this is complete the pneumatic sleeve 50 and undersleeve 30 are removed. Local anesthetic is then infuesed to effect a Bier Block.
It is evident that the inventive system attains the stated objects and advantages, among others.
The disclosed details are exemplary only and are not to be taken as limitations on the invention, except as those details may be included in the appended claims.
Claims
Claim 1 A two piece pneumatic system for driving venous blood from a patient's body extremity to prepare same for local anesthetic, said system comprising a flexible, disposable conformable undersleeve (30) and a reusable conformable pneumatic outer sleeve (10), both said undersleeve and said outer sleeves being closed at one end (32,16) and open at the other end (34,22) for receiving said patient's extremity, said inner sleeve acting to cover said patient's extremity to protect a clinician from infection, said pneumatic outer sleeve being provided with a handle with holes (20) whereby it can be manipulated and hung from a support, said pneumatic sleeve having an inner wall (12) and an outer wall (14) with a sealed annular chamber (24) therebetween and an air valve (26) in said outer wall for introducing and removing air from said sealed annular chamber to inflate said annular chamber to drive blood from said patient's extremity and to deflate said annular chamber to ease the removal of said pneumatic sleeve when venous blood has been driven from said extremity.
Claim 2 A system according to Claim 1 for use with a proximal cuff (52) and a distal cuff (54), said pneumatic sleeve having a pair of slits (60) parallel to its axis and in open communication with said open end (22) of said pneumatic sleeve, said slits adapted to receive therein tubular inlets/outlets (56) of the proximal cuff and the distal cuff and said pneumatic sleeve also having two flaps (62) with hook and loop fasteners thereon and complementary hook and loop (64) elements on the exterior of said outer wall to engage the hook and loop fasteners on said flaps, thereby to hold said pneumatic sleeve in surrounding relationship with said proximal cuff and said distal cuff.
Claim 3 A system according to Claim 1 wherein said undersleeve and said pneumatic outer sleeve are made from elastomeric materials.
Claim 4 A system according to Claim 1 wherein said undersleeve and said pneumatic outer sleeve are made from flexible plastic materials.
Claim 5 A method in combination with the system according to Claim 1 to remove venous blood from a patient's extremity and to protect the administering clinician from contact with said extremity prior to the administration of anesthetic which comprises applying a tourniquet such as inflatable proximal (52) and said distal cuffs (54) on said patient's extremity nearest the torso; applying said flexible plastic undersleeve (30) over said extremity below said proximal and distal cuffs; applying said pneumatic sleeve (50) over said undersleeve; pressurizing and inflating said pneumatic sleeve to a pressure in excess of the pressure of said venous blood thereby draining the same from the extremity, inflating said proximal (52) and distal cuffs (54) to disrupt arterial blood, deflating said pneumatic sleeve (50), removing said deflated pneumatic sleeve and removing said undersleeve, said extremity now being ready for the administration of anesthetic.
Claim 2 A system according to Claim 1 for use with a proximal cuff (52) and a distal cuff (54), said pneumatic sleeve having a pair of slits (60) parallel to its axis and in open communication with said open end (22) of said pneumatic sleeve, said slits adapted to receive therein tubular inlets/outlets (56) of the proximal cuff and the distal cuff and said pneumatic sleeve also having two flaps (62) with hook and loop fasteners thereon and complementary hook and loop (64) elements on the exterior of said outer wall to engage the hook and loop fasteners on said flaps, thereby to hold said pneumatic sleeve in surrounding relationship with said proximal cuff and said distal cuff.
Claim 3 A system according to Claim 1 wherein said undersleeve and said pneumatic outer sleeve are made from elastomeric materials.
Claim 4 A system according to Claim 1 wherein said undersleeve and said pneumatic outer sleeve are made from flexible plastic materials.
Claim 5 A method in combination with the system according to Claim 1 to remove venous blood from a patient's extremity and to protect the administering clinician from contact with said extremity prior to the administration of anesthetic which comprises applying a tourniquet such as inflatable proximal (52) and said distal cuffs (54) on said patient's extremity nearest the torso; applying said flexible plastic undersleeve (30) over said extremity below said proximal and distal cuffs; applying said pneumatic sleeve (50) over said undersleeve; pressurizing and inflating said pneumatic sleeve to a pressure in excess of the pressure of said venous blood thereby draining the same from the extremity, inflating said proximal (52) and distal cuffs (54) to disrupt arterial blood, deflating said pneumatic sleeve (50), removing said deflated pneumatic sleeve and removing said undersleeve, said extremity now being ready for the administration of anesthetic.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/US1993/003155 WO1993019767A1 (en) | 1992-04-07 | 1993-04-06 | Cd28 pathway immunoregulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2133074A1 true CA2133074A1 (en) | 1993-10-14 |
Family
ID=29248145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002133074A Abandoned CA2133074A1 (en) | 1993-04-06 | 1992-03-27 | Exsanguinating to prepare extremity for anesthetic |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2133074A1 (en) |
-
1992
- 1992-03-27 CA CA002133074A patent/CA2133074A1/en not_active Abandoned
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |