Reference Manual - IARC Screening Group

APPENDIX DTECHNICAL OVERVIEW OF THECRYOTHERAPY SYSTEM 1This section provides general information on the Model LL100cryotherapy system 2 (Wallach Surgical Devices, Inc.) to familiarize theuser with the major components of the system, as well as the technicalaspects of its use. It also provides information on post-procedureprocessing, for infection prevention, and on proper storage. Appendix Eprovides guidance for troubleshooting problems commonly encounteredwhen using the LL100 Cryotherapy System. Page references to suchguidance appear where appropriate throughout this section.ANATOMY OF THE SYSTEMThe cryotherapy system (Figure D-1), which is designed to connect to agas cylinder (Figure D-2), consists of the following components:• Metal cryotip with plastic sleeve;• Hand-held cryotherapy unit (or “cryogun”or “cryoprobe”), whichincludes the handle, freeze and defrost triggers, and insulated probe;• Flexible hose connecting the regulator to the cryotherapy unit; and• Regulator with pressure gauge, cryotherapy unit holder, safety valve,and exhaust port.1 Adapted from: Blumenthal P. 2004. The Model ll10 Cryotherapy System: An Operational and Use Guide to BasicRepair and Maintenance. JHPIEGO: Baltimore.2 In this manual, illustrations and instructions specifically related to the cryotherapy system/unit are based on the WallachLL100 Cryotherapy System (Wallach Surgical Devices, Inc., 235 Edison Road, Orange, CT 06477, USA.www.wallachsd.com). While the principles of cryotherapy are the same regardless of the system used, other systems maydiffer in appearance, operating features, and procedures for proper use.Cervical Cancer Prevention Guidelines for Low-Resource Settings D-1