Disposable inflatable tourniquet cuff

• US 5,733,304 A
• Filed: 08/21/1996
• Issued: 03/31/1998
• Est. Priority Date: 08/21/1996
• Status: Expired due to Term

• Current Assignee: Stryker Corporation
• Original Assignee: InstruMed, Inc.
• Inventors: Spence, Jerry L.
• Primary Examiner(s): TRINH, HOA B
• Assistant Examiner(s): Mulcare, Nancy Connoly
• Application Number:
  US08/701,100
• Time in Patent Office: 587 Days
• Field of Search: 606/202, 606/203, 606/204, D24/143, 128/686, 128/DIG. 20, 128/DIG. 15, 383/3
• US Class Current: 606/203
• CPC Class Codes: A61B 17/135 inflatable for measuring blood pressure A61B5/022; inflatable pressure pads A61F5/34

Abstract

A disposable inflatable tourniquet cuff which may include an inflatable bladder having inner and outer walls which, in order to reduce cost and complexity, may be of the same size and made from the same material. A stiffener may be located within the bladder'"'"'s inflatable fluid space, to eliminate the need for any separate parts to properly locate or hold the stiffener. The walls may have exterior, velcro-type soft, fuzzy loops or filaments; and be secured together with welds having a width selected to prevent the longitudinal sides of the cuff from spontaneously rolling up. The soft, fuzzy inner wall may serve as the patient contacting part of the cuff, thereby eliminating the need for a separate soft, fuzzy inner cover to protect the patient; and may serve to engage the hook-type velcro surface on other parts of the cuff, to hold them in the desired position. The soft, fuzzy outer wall may serve to engage the hook-type velcro on certain other parts of the cuff; as well as to engage the hook-type velcro on both the anchored and free surfaces of the strap that is used to hold the cuff in place on the patient'"'"'s limb. An anchoring and alignment patch or tab may be provided to assist in the anchoring and even winding of the cuff about the patient'"'"'s limb. During use of the tourniquet cuff, the strap may also serve as a stiffener to limit the outward movement of the bladder'"'"'s outer wall when the bladder is inflated, thereby eliminating the need for a separate stiffener element to serve this function.

Claims

1. A disposable inflatable tourniquet cuff comprising:

a bladder;

a stiffener; and

a strap;

wherein said bladder comprises fluid-tight inner and outer walls;

wherein said bladder'"'"'s inner and outer walls each further comprise a pair of respective longitudinal sides having a length, and a pair of respective transverse sides having a width;

wherein said transverse sides are shorter than said longitudinal sides;

wherein longitudinal sides of said bladder'"'"'s inner wall are sealed to said longitudinal sides of said bladder'"'"'s outer wall with a pair of longitudinal side welds;

wherein each of said longitudinal side welds has a width;

wherein a ratio of said width of said transverse side to said width of said longitudinal side weld is on the order of from about 18;

1 to about 6;

1, to enable said pair of longitudinal side welds to stiffen said longitudinal sides to a point that said pair of longitudinal side welds at least partially help to prevent said longitudinal sides of said bladder from curling up towards a longitudinal centerline of said bladder while said bladder is being wound about said patient'"'"'s limb;

wherein said inner and outer walls each comprise a velcro-type soft, fuzzy surface;

wherein said inner and outer walls form an inflatable space;

wherein said stiffener is located within said inflatable space;

wherein said bladder comprises a fixed end portion and a free portion;

wherein, during use of said tourniquet cuff, said bladder is adapted to be wound about a limb of a patient;

wherein said tourniquet cuff further comprises an anchoring and aligning means;

wherein, as said bladder is wound about said patient'"'"'s limb, said anchoring and aligning means are for selectively anchoring and aligning said bladder'"'"'s fixed end portion with respect to an overlapping part of said bladder'"'"'s free portion, to enable a remaining part of said bladder'"'"'s free portion to be evenly wound in alignment with, and on top of, a previously wound part of said bladder;

wherein said tourniquet cuff further comprises inflation/deflation means for permitting the entry of a fluid into said inflatable space to inflate said bladder, and for permitting the exit of said fluid out of said inflatable space to deflate said bladder;

wherein, during use of said tourniquet cuff, said strap is adapted to releasably secure said bladder to a limb of a patient;

wherein said strap comprises an anchored portion and a free portion;

wherein said strap'"'"'s anchored and free portions each comprises velcro-type hooks;

wherein, during use of said tourniquet cuff, at least part of said inner wall'"'"'s velcro-type soft, fuzzy surface is adapted to be in contact with said patient'"'"'s limb, and is adapted to provide a comfortable, slip-resistant, contact surface with said patient'"'"'s limb;

wherein part of said outer wall'"'"'s velcro-type soft, fuzzy surface is adapted to engage said velcro-type hooks of said strap'"'"'s anchored portion, to permanently anchor said strap'"'"'s anchored portion to said outer wall; and

wherein, during use of said tourniquet cuff, at least part of said outer wall'"'"'s velcro-type soft, fuzzy surface is adapted to engage said velcro-type hooks of said strap'"'"'s free portion, to releasably anchor said strap'"'"'s free portion to said outer wall.

2. A disposable inflatable tourniquet cuff comprising:

a bladder; and

a strap;

wherein said bladder comprises fluid-tight inner and outer walls;

wherein said inner and outer walls each comprise a velcro-type soft, fuzzy surface;

wherein said inner and outer walls form an inflatable space;

wherein said tourniquet cuff further comprises inflation/deflation means for permitting the entry of a fluid into said inflatable space to inflate said bladder, and for permitting the exit of said fluid out of said inflatable space to deflate said bladder;

wherein, during use of said tourniquet cuff, said bladder is adapted to be wound about a limb of a patient;

wherein, during use of said tourniquet cuff, said strap is adapted to releasably secure said bladder to a limb of a patient;

wherein said strap comprises an anchored portion and a free portion;

wherein said strap'"'"'s anchored and free portions each comprises velcro-type hooks;

wherein, during use of said tourniquet cuff, at least part of said inner wall'"'"'s velcro-type soft, fuzzy surface is adapted to be in contact with said patient'"'"'s limb, and is adapted to provide a comfortable, slip-resistant, contact surface with said patient'"'"'s limb;

wherein part of said outer wall'"'"'s velcro-type soft, fuzzy surface is adapted to engage said velcro-type hooks of said strap'"'"'s anchored portion, to permanently anchor said strap'"'"'s anchored portion to said outer wall; and

wherein, during use of said tourniquet cuff, at least part of said outer wall'"'"'s velcro-type soft, fuzzy surface is adapted to engage said velcro-type hooks of said strap'"'"'s free portion, to releasably anchor said strap'"'"'s free portion to said outer wall.

3. The tourniquet cuff according to claim 2,

wherein said bladder'"'"'s inner and outer walls each further comprise a pair of respective longitudinal sides having a length, and a pair of respective transverse sides having a width;

wherein said transverse sides are shorter than said longitudinal sides;

wherein longitudinal sides of said bladder'"'"'s inner wall are sealed to said longitudinal sides of said bladder'"'"'s outer wall with a pair of longitudinal side welds;

wherein each of said longitudinal side welds has a width;

wherein a ratio of said width of said transverse side to said width of said longitudinal side weld is on the order of from about 18;

1 to about 6;

1, to enable said pair of longitudinal side welds to stiffen said longitudinal sides to a point that said pair of longitudinal side welds at least partially help to prevent said longitudinal sides of said bladder from curling up towards a longitudinal centerline of siad bladder while said bladder is being wound about said patient'"'"'s limb.

4. The tourniquet cuff according to claim 2,

wherein said bladder comprises a fixed end portion and a free portion;

wherein said tourniquet cuff further comprises an anchoring and aligning means; and

wherein, as said bladder is wound about said patient'"'"'s limb, said anchoring and aligning means are for selectively anchoring and aligning said bladder'"'"'s fixed end portion with respect to an overlapping part of said bladder'"'"'s free portion, to enable a remaining part of said bladder'"'"'s free portion to be evenly wound in alignment with, and on top of, a previously wound part of said bladder.

5. The tourniquet cuff according to claim 4,

wherein said anchoring and aligning means comprises an anchoring and aligning patch;

wherein said patch comprises an inner surface and an outer surface;

wherein said patch'"'"'s inner surface is secured to said outer wall near said fixed end portion of said bladder;

wherein said patch'"'"'s outer surface comprises velcro-type hooks; and

wherein said patch'"'"'s velcro-type hooks are adapted to be releasably secured to a corresponding, overlapping part of said inner wall'"'"'s velcro-type soft, fuzzy surface.

6. The tourniquet cuff according to claim 4,

wherein said anchoring and aligning means comprises an anchoring and aligning tab;

wherein said tab comprises an anchored portion and a free portion;

wherein said tab'"'"'s anchored portion comprises velcro-type hooks;

wherein said tab'"'"'s free portion comprises velcro-type hooks;

wherein a part of said inner wall'"'"'s velcro-type soft, fuzzy surface that is located near said bladder'"'"'s fixed end portion is adapted to engage said velcro-type hooks of said tab'"'"'s anchored portion, to permanently anchor said tab'"'"'s anchored portion to said inner wall; and

wherein, said velcro-type hooks of said tab'"'"'s free portion are adapted to be releasably secured to a corresponding, overlapping part of said inner wall'"'"'s velcro-type soft, fuzzy surface.

7. The tourniquet cuff according to claim 2,

wherein said bladder further comprises four corners;

wherein at least one of said corners has a radius, to enable said corner to have an arcuate configuration that is adapted to help to prevent said at least one of said corners from causing discomfort to said patient during use of said tourniquet cuff.

8. The tourniquet cuff according to claim 7, wherein said bladder has a length and a width;

wherein said bladder'"'"'s length is greater than said bladder'"'"'s width; and

wherein a ratio of said bladder'"'"'s width to said radius of said at least one corner is on the order of from about 2;

1 to about 8;

1.

9. A disposable inflatable tournique cuff comprising:

a bladder; and

a strap;

wherein said bladder comprises fluid-tight inner and outer walls;

wherein said inner and outer walls form an inflatable space;

wherein said tourniquet cuff further comprises inflation/deflation means for permitting the entry of a fluid into said inflatable space to inflate said bladder, and for permitting the exit of said fluid out of said inflatable space to deflate said bladder;

wherein, during use of said tourniquet cuff, said bladder is adapted to be wound about a limb of a patient;

wherein, during use of said tourniquet cuff, said strap is adapted to releasably secure said bladder to a limb of a patient;

wherein said strap comprises an anchored portion and a free portion;

wherein said strap'"'"'s anchored portion is permanently anchored to said outer wall with a velcro-type connection; and

wherein during use of said tournique cuff, said strap'"'"'s free portion is adapted to be releasably anchored to said outer wall with a velcro-type connection.

10. The tourniquet cuff according to claim 9,

wherein said inner and outer walls each comprises a velcro-type soft, fuzzy sufface;

wherein said strap'"'"'s anhcored and free portions each comprises velcro-type hooks;

wherien during use of said tourniquet cuff, at least part of said inner wall'"'"'s velcro-type soft, fuzzy surface is adpated to be in contact with said patient'"'"'s limb, and is adapted to provide a comfortable, slip-resistant, contact surface with said patient'"'"'s limb;

wherein part of said outer wall'"'"'s velcro-type soft, fuzzy surface is adapted to enage said velcro-type hooks of said strap'"'"'s anchored portion, to permanently anchor said strap'"'"'s anchored portion to said outer wall; and

wherein, during use of said tourniquet cuff, at least part of said outer wall'"'"'s velcro-type soft, fuzzy surface is adapted to engage said velcro-type hooks of said strap'"'"'s free portion, to releasably anchor said strap'"'"'s free portion to said outer wall.

11. The tourniquet cuff according to claim 10

wherein said bladder comprises a fixed end portion and a free portion;

wherein said tourniquet cuff further comprises an anchoring and aligning means; and

wherein, as said bladder is wound about said patient'"'"'s limb, said anchoring and aligning means are for selectively anchoring and aligning said bladder'"'"'s fixed end portion with respect to an overlapping part of said bladder'"'"'s free portion, to enable a remaining part of said bladder'"'"'s free portion to be evenly wound in alignment with, and on top of, a previously wound part of said bladder.

12. The tourniquet cuff according to claim 11,

wherein said anchoring and aligning means comprises an anchoring and aligning patch;

wherein said patch comprises an inner surface and an outer surface;

wherein said patch'"'"'s inner surface is secured to said outer wall near said fixed end portion of said bladder;

wherein said patch'"'"'s outer surface comprises velcro-type hooks; and

wherein said patch'"'"'s velcro-type hooks are adapted to be releasably secured to a corresponding, overlapping part of said inner wall'"'"'s velcro-type soft, fuzzy surface.

13. The tourniquet cuff according to claim 12,

wherein said anchoring and aligning means comprises an anchoring and aligning tab;

wherein said tab comprises an anchored portion and a free portion;

wherein said tab'"'"'s anchored portion comprises velcro-type hooks;

wherein said tab'"'"'s free portion comprises velcro-type hooks;

wherein a part of said inner wall'"'"'s velcro-type soft, fuzzy surface that is located near said bladder'"'"'s fixed end portion is adapted to engage said velcro-type hooks of said tab'"'"'s anchored portion, to permanently anchor said tab'"'"'s anchored portion to said inner wall; and

wherein, said velcro-type hooks of said tab'"'"'s free portion are adapted to be releasably secured to a corresponding, overlapping part of said inner wall'"'"'s velcro-type soft, fuzzy surface.

14. The tourniquet cuff according to claim 9,

wherein said bladder'"'"'s inner and outer walls each further comprise a pair of respective longitudinal sides having a length, and a pair of respective transverse sides having a width;

wherein said transverse sides are shorter than said longitudinal sides;

wherein longitudinal sides of said bladder'"'"'s inner wall are sealed to said longitudinal sides of said bladder'"'"'s outer wall with a pair of longitudinal side welds;

wherein each of said longitudinal side welds has a width;

wherein a ratio of said width of said transverse side to said width of said longitudinal side weld is on the order of from about 18;

1 to about 6;

1, to enable said pair of longitudinal side welds to stiffen said longitudinal sides to a point that said pair of longitudianl side welds at least partially help to prevent said longitudinal sides of said bladder from curling up towards a longitudinal centerline of said bladder while said bladder is being wound about said patient'"'"'s limb.

15. The tourniquet cuff according to claim 9,

wherein said bladder further comprises four corners;

wherein at least one of said corners has a radius, to enable said corner to have an arcuate configuration that is adapted to help to prevent said at least one of said corners from causing discomfort to said patient during use of said tourniquet cuff.

16. The tourniquet cuff according to claim 15, wherein said bladder has a length and a width;

wherein said bladder'"'"'s length is greater than said bladder'"'"'s width; and

wherein a ratio of said bladder'"'"'s width to said radius of said at least one corner is on the order of from about 2;

1 to about 8;

1.