System and method for detecting perforations in a body cavity

Surgery – Diagnostic testing – Injecting gas into body canal or cavity

Reexamination Certificate

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Details

C600S587000, C600S561000, C607S063000, C606S041000

Reexamination Certificate

active

07063670

ABSTRACT:
A system and method for detecting perforations in a body cavity. In accordance with the method of the invention, a fluid (liquid or gas) is delivered into a body cavity to slightly pressurize the cavity. A pressure sensing system monitors the pressure within the cavity for a predetermined test period. If cavity pressure is not substantially sustained during the test period, the physician is alerted to further assess the cavity for perforations before initiating treatment within the cavity. In a preferred form of the system, a medical treatment system such as an RF ablation system is provided with perforation detection functionality. The system preferably includes a pre-test and post-test lockout system. The lockout system prevents RF power delivery unless, during a predetermined test period, the pressure sensing system determines that no perforation exists, or unless a previously performed perforation detection procedure determined a perforation was present but the lockout system was subsequently overridden by the physician.

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D.R. Flum et al., “The accuracy of gastric insufflation in testing for gastroesoesophageal perforations during laparoscopic Nissen fundoplication,”Medscap from WebMD(Oct.-Dec. 1999), “Abstract MEDLINE/AIDSLINE,” printed Jun. 23, 2004 from htt; //intapp.medscape.com/px/medlineapp/getdoc?ord=3&searched=3&have—local—holdin . . . , one page in length.

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