Beds – Invalid bed or surgical support – With body member support or restrainer
Reexamination Certificate
1999-05-26
2001-11-06
Browne, Lynne H. (Department: 3628)
Beds
Invalid bed or surgical support
With body member support or restrainer
C005S621000, C005S648000, C128S845000, C128S846000
Reexamination Certificate
active
06311349
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates generally to a positioning device for stabilizing a patient while lying on their side on a surgical table and, more particularly, to a midline pelvic positioner for stabilizing a patient during total hip replacement surgery.
DESCRIPTION OF THE PRIOR ART
During some types of surgical procedures, such as total hip replacement (THR) surgery, the patient is positioned lying on one side, referred to as the lateral decubitus position. While in the lateral decubitus position the patient's body is unstable and must be supported. Conventional pelvic positioners used to limit the motion of the patient's body during surgery while lying in the lateral decubitus position generally include vertical anterior and posterior pads that apply pressure to the pelvis. The anterior and posterior pads of these conventional devices contact the body in areas of varying soft tissue thickness, such as the abdomen and the buttocks, and stabilize motion of the pelvis by applying pressure to the overlying soft tissue. Although the body is constrained between the two pads, the pelvis is still subject to an undesirable degree of motion as a result of the resiliency of the soft tissue. Movement of the patient's body during THR surgery significantly increases the difficulty of accurately positioning of the acetabular components relative to the standing pelvic orientation.
SUMMARY OF THE INVENTION
An object of the invention is to provide an improved pelvic positioning device for precisely and repeatably orienting the position of the patient's body relative to the operating table.
Another object of the invention is to provide an improved pelvic position device that imparts greater pelvic stability during surgery so that the surgeon may exactly orient the acetabular components relative to the patient's pelvis by referencing the axes of the operating table.
The pelvic positioning device in accordance with the present invention is directed to a positioning device for supporting a patient's body in a lateral position on a table. In a preferred embodiment, the pelvic positioning device includes an anterior pelvic support mechanism including a first anterior support pad positioned so as to support both pubic tubercles of the patient's body; and a second anterior support pad positioned so as to support an anterior superior iliac spine on one side of the patient's body. The first and second anterior support pads are displaceable independently of one another and in three directions with each direction being substantially perpendicular to the others. Furthermore, the first anterior support pad is adapted so as to be separated by a distance from a pubic symphysis of the patient's body.
The positioning device also includes a crescent-shaped posterior support pad having a cephalad end and a caudad end. The posterior support pad is arranged so as that it extends along the sacrum of the patient's body with the caudad end terminating proximate a coccyx of the patient's body.
In addition, the invention is directed to a method for using the positioning device described above. Initially, a first anterior support pad is positioned so as to be proximate both pubic tubercles of the patient's body and a second anterior support pad is positioned independently of the first anterior support pad so as to be proximate an anterior superior iliac spine on one side of the patient's body.
To provide additional stability, a crescent-shaped posterior support pad having a cephalad end and a caudad end is positioned so that it extends along the patient's sacrum.
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Instructions for Montreal Lateral Positioning Device, Orthopedic Systems, Inc., 1997.
Haas Steven
Kazakia Galateia
Lipman Joseph
Robie Bruce
Browne Lynne H.
Darby & Darby
Hewitt James M
New York Society for the Relief of the Ruptured and Crippled Mai
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