Surgical fluid management

• US 8,979,798 B2
• Filed: 09/04/2012
• Issued: 03/17/2015
• Est. Priority Date: 06/13/2005
• Status: Active Grant

• Current Assignee: Smith & Nephew Incorporated (Smith & Nephew PLC)
• Original Assignee: Smith & Nephew Incorporated (Smith & Nephew PLC)
• Inventors: Shener, Cemal, Krause, Kenneth W., Hedstrom, Petter, Loreth, Brian J.
• Primary Examiner(s): Eisenberg, Rebecca E
• Application Number:
  US13/602,851
• Publication Number:
  US 20120330240A1
• Time in Patent Office: 924 Days
• Field of Search: 604/151, 604 65- 67, 604/131, 417/477.2
• US Class Current: 604/151
• CPC Class Codes: A61B 17/00234 for minimally invasive surgery A61B17/0218, A61B17/0469, A61B17/12013, A61B17/1285, A61B17/29, A61B17/320016 take precedence
• CPC Class Codes: A61B 17/3474 Insufflating needles, e.g. Veress needles
• CPC Class Codes: A61M 2205/12 with interchangeable cassettes forming partially or totally the fluid circuit
• CPC Class Codes: A61M 3/0201 Cassettes therefor
• CPC Class Codes: A61M 3/0202 with electronic control means or interfaces
• CPC Class Codes: A61M 3/0216 Pressure
• CPC Class Codes: A61M 3/022 Volume; Flow rate
• CPC Class Codes: A61M 3/0258 by means of electric pumps
• CPC Class Codes: Y10T 29/49826 Assembling or joining

Abstract

A fluid flow device includes a housing configured to releasably mate with a surgical control unit for controlling fluid flow during a surgical procedure. First and second ports measure fluid pressure within a fluid path provided within the housing. The fluid flow device includes a restrictor for restricting fluid flow at a restriction location along the fluid path. The first port is located upstream of the restriction location and the second port is located downstream of the restriction location. A fluid pump is provided within the housing.

Claims

1. A pump cassette for releasably mating with a surgical control unit, the control unit defining a cassette receiving slot with a guide track and comprising first and second pressure transducers, the pump cassette comprising:

a housing having a protrusion configured and arranged to mate with the guide track during introduction into and final placement within the slot such that the housing is spaced from the pressure transducers during introduction into the slot and contacts the pressure transducers when in final placement within the slot,

the housing generally rectangular-shaped and including an upper end, a lower end, a distal end, and a proximal end, the upper and lower ends each including a pair of raised protrusions, a pair of relatively higher raised protrusions, and a pair of trapezoidally shaped protrusions configured to be received within the guide track, and

the distal end defining a cassette type recognition slot and a cassette insertion recognition recess which are configured to enable the control unit to recognize a type of the pump cassette and that the pump cassette has been inserted into the control unit.

2. A method of mating a pump cassette to a surgical control unit, the surgical control unit defining a cassette receiving slot with a guide track and having first and second pressure transducers, comprising:

aligning a protrusion on the cassette with the guide track and pushing the cassette into the guide track such that the cassette moves from a position spaced from the pressure transducers during introduction into the slot to a final placement in contact with the pressure transducers;

aligning a leading edge of a microswitch disposed on the control unit with a cassette insertion recognition recess defined in the cassette; and

recognizing a pump cassette type based on the interaction of the microswitch with the recess.