Automatic surgical sponge counter and blood loss determination system

• US 8,105,296 B2
• Filed: 10/12/2005
• Issued: 01/31/2012
• Est. Priority Date: 08/05/1994
• Status: Expired due to Fees

• Current Assignee: Stryker Corporation
• Original Assignee: Clearcount Medical Solutions Incorporated (Stryker Corporation)
• Inventors: Morris, Sharon L., Morris, Dean E.
• Primary Examiner(s): Kidwell, Michele M
• Application Number:
  US11/248,350
• Publication Number:
  US 20060044137A1
• Time in Patent Office: 2,302 Days
• Field of Search: 604317-318, 235435-436, 235438-440, 235/444
• US Class Current: 604/317
• CPC Class Codes: A61B 2050/0018 Electric heating
• CPC Class Codes: A61B 2050/375 for sponges
• CPC Class Codes: A61B 2090/0805 automatically, e.g. by means of magnetic, optical or photoelectric detectors
• CPC Class Codes: A61B 2217/005 with suction drainage system
• CPC Class Codes: A61B 2217/007 with irrigation system
• CPC Class Codes: A61B 50/37 for absorbent articles, e.g. bandages, garments, swabs or towels
• CPC Class Codes: A61B 90/98 using electromagnetic means, e.g. transponders
• CPC Class Codes: A61M 1/777 Determination of loss or gain of body fluids due to suction-irrigation, e.g. during surgery
• CPC Class Codes: G01G 17/04 for weighing fluids, e.g. gases, pastes
• CPC Class Codes: G01G 19/414 using electronic computing means only
• CPC Class Codes: G06M 1/108 by electronic means
• CPC Class Codes: G06M 7/00 Counting of objects carried by a conveyor

Abstract

A surgical sponge detection system includes a plurality of surgical sponges (2) having radio frequency identification tags (1) securely attached thereto and a non-optical hand-held reader (40) for detecting the sponges by detecting the tags (1). Also disclosed is a device (30) for automatically counting, weighing, and calculating blood loss contained within, soiled surgical sponges (2) which includes a cabinet with an opening (3) at the top through which sponges (2) are deposited, a reader (6) which scans each sponge (2) entered and determines sponge type from a tag (1) affixed to each sponge (2), and a disposable bag (8) into which the sponges (2) are deposited. The disposable bag (8) is removably mounted to a weighing scale (10); there is also a rear door (9) from which the disposable bag (8) can be easily removed, a rechargeable battery (11), a shelf (12) for unused disposable bag storage, a control unit (4) which processes data received from reader (6) and scale (10) and instantaneously calculates total weight of liquid contained within sponges entered, a display panel (5) continuously displays the number and type of sponges entered during a given procedure as well as the total weight of liquids retained in those sponges. There is a means for automatically determining the weight of the sponges when dry which includes a non-optical scanner means (6) which can read an indicating means (1) on the sponges (2) even when the indicating means (1) is covered with blood or other body fluids.

Claims

1. A surgical sponge counting system, comprising:

a plurality of sponges made of an absorbent material;

an RF identification tag carried by each of said plurality of sponges, each tag being operable to transmit a unique data string corresponding to the tagged sponge; and

an automatic sponge counter apparatus comprising;

a container configured for receiving said surgical sponges without requiring user sorting of said sponges;

a non-optical scanner for interrogating RF identification tagged sponges in said container, said scanner simultaneously reading a plurality of tagged sponges present within said container, said scanner detecting each of the plurality of tagged sponges electromagnetically, said scanner detecting the unique data strings corresponding to each of the plurality of tagged sponges; and

a control unit that maintains a count of a total number of tagged sponges present in said container, said control unit maintaining a running count of a number of tagged sponges from a predetermined time, said control unit being responsive to said non-optical scanner, said control unit receiving the unique data strings from the non-optical scanner, said control unit identifying each of the plurality of tagged sponges based on the unique data string.

2. The system of claim 1, wherein the tag carried by each of said plurality of tagged sponges indicates a dry weight of the sponge.

3. The system of claim 1, wherein the RF identification tags do not exceed one inch in diameter and 0.20 inches in thickness.

4. The system of claim 1, wherein the RF identification tags do not exceed four grams in weight.

5. The system of claim 1, wherein the RF identification tags do not exceed three grams in weight.

6. The system of claim 1, further comprising a handheld scanner.

7. The system of claim 1, wherein each RF tag is encoded with a number selected from within a range of 0 to 64 bits, binary.

8. The system of claim 1 wherein said container has only a single access opening therein.

9. A surgical sponge counting system, comprising:

a plurality of sponges made of an absorbent material;

an RF identification tag carried by each of said plurality of sponges, each tag being operable to transmit a unique data string corresponding to the tagged sponge; and

an automatic sponge counter apparatus comprising;

a container configured for receiving said surgical sponges;

a non-optical scanner for interrogating a plurality of RF identification tagged sponges simultaneously present in said container, said scanner simultaneously reading a plurality of tagged sponges present within said container, said scanner detecting each of the plurality of tagged sponges electromagnetically, said scanner detecting the unique data strings corresponding to each of the plurality of tagged sponges; and

a control unit that maintains a count of a total number of tagged sponges present in said container, said control unit maintaining a running count of a number of tagged sponges from a predetermined time, said control unit being responsive to said non-optical scanner, said control unit receiving the unique data strings from the non-optical scanner, said control unit identifying each of the plurality of tagged sponges based on the unique data string.