Occlusive cuff

• US 5,578,055 A
• Filed: 07/25/1994
• Issued: 11/26/1996
• Est. Priority Date: 09/30/1991
• Status: Expired due to Term

• Current Assignee: Zimmer Orthopaedic Surgical Products (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Abatis Medical Technologies Limited
• Inventors: McEwen, James A.
• Primary Examiner(s): Buiz, Michael Powell
• Assistant Examiner(s): DAWSON, GLENN K
• Application Number:
  US08/211,389
• Time in Patent Office: 855 Days
• Field of Search: 606/13, 606/53, 606/201-203, 128/DIG. 19, 128/DIG. 20
• US Class Current: 606/202
• CPC Class Codes: A61B 17/135 inflatable for measuring blood pressure A61B5/022; inflatable pressure pads A61F5/34

Abstract

An overlapping occlusive cuff has an inflatable bladder and a sheath for containing the inflatable bladder, wherein the sheath has a length sufficient to encircle a limb and overlap on itself in a substantially circumferential direction around the limb. First and second means are provided for securing the overlapping sheath in a substantially circumferential direction around the limb such that the sheath remains overlapped and secured by the second means if the first means does not engage or becomes ineffective while the bladder is inflated to a pressure sufficient to occlude flow in blood vessels in the limb encircled by the overlapping sheath.

Claims

1. An overlapping occlusive cuff adapted to be applied circumferentially around a limb and having secondary securing means for improved safety, comprising:

an inflatable bladder having a length selected to be greater than the circumference of a limb at a desired location;

a sheath containing the bladder and having an inner side adapted to face the limb, an outer side adapted to face away from the limb and a length greater than the length of the bladder, thereby establishing an inflating portion and a non-inflating portion of the sheath along the length of the sheath, and

first sheath securing means having a first element on the outer side of the sheath, and a second element attached to the inner side of the sheath at a selected location on the non-inflating portion so that the second dement engages the first element to secure the sheath when the sheath is applied around the limb; and

second sheath securing means for securing the overlapping sheath in a substantially circumferential direction around the limb such that the sheath remains overlapped and secured if the second element of the first sheath securing means does not engage the first element of the first sheath securing means or becomes ineffective while the bladder is inflated to a pressure sufficient to occlude flow in blood vessels in the limb encircled by the sheath;

wherein the length of the sheath is sufficient for the inflating portion to overlap upon itself and for the non-inflating portion of the sheath to overlap the inflating portion when the sheath is applied circumferentially around the limb at the desired location with the first and second sheath securing means securing the sheath around the limb.

2. The cuff as described in claim 1 wherein the second sheath securing means has a first securing element attached to the outer side of the sheath across the center axis and a second securing element attached to the outer side of the sheath extending past one of the end edges to engage the first securing element when the sheath is applied around the limb at the desired location, thereby securing the sheath.

3. An overlapping occlusive cuff having secondary securing means for improved safety, comprising:

a sheath having an inner side, an outer side, side edges, end edges, a center axis located equidistant between the side edges and a length dimension along the center axis between the end edges, and having an inflating portion and a non-inflating portion extending along the length of the sheath, wherein the length of the sheath is sufficient for the sheath to overlap when the sheath is applied circumferentially around a limb at a desired location;

first sheath securing means having a first element on the outer side of the sheath and a second element attached to the inner side of the sheath at a selected location in the non-inflating portion and extending across the center axis at the location so that the second element engages the first element to secure the sheath when the sheath is applied around the limb; and

second sheath securing means for securing the overlapping sheath in a substantially circumferential direction around the limb such that the sheath remains overlapped and secured if the second element of the first sheath securing means does not engage the first element of the first sheath securing means or becomes ineffective while the inflating portion of the sheath is inflated to a pressure sufficient to occlude flow in blood vessels in the limb encircled by the sheath.

4. The cuff as described in claim 3 wherein the second sheath securing means has a first securing element attached to the outer side of the sheath across the center axis and a second securing element attached to the outer side of the sheath extending past one of the end edges to engage the first securing element when the sheath is applied around the limb at the desired location, thereby securing the sheath.

5. An overlapping occlusive cuff having secondary securing means for improved safety;

comprising;

a sheath having an inner side, an outer side, side edges, end edges, a center axis located equidistant between the side edges and an length dimension along the center axis between the end edges, and having an inflating portion and a non-inflating portion extending along the length of the sheath, wherein the length of the inflating portion of the sheath is sufficient for the inflating portion to overlap when the sheath is applied circumferentially around a limb at a desired location on the limb;

first sheath securing means having a first element on the outer side of the sheath and a second element on the inner side of the sheath at a selected sheath location and extending across the center axis at the location so that the second element engages the first element to secure the sheath when the sheath is applied around the limb, wherein the second element has a width dimension between the side edges which is less than the distance between the side edges at the selected sheath location and a length dimension along the center axis which is less than the width dimension; and

second sheath securing means having a third element on the outer side of the sheath and having a fourth element attached to the outer side of the sheath and extending past one of the end edges to engage the third element across the center axis of the sheath when the sheath is applied around the limb at the desired location, thereby securing the overlapping sheath in a substantially circumferential direction around the limb such that the sheath remains overlapped and secured if the second element of the first securing means does not engage the first element of the first securing means or becomes ineffective while the inflating portion of the sheath is inflated to a pressure sufficient to occlude flow in blood vessels in the limb encircled by the sheath.