The application of {TAIL ~ vacuum} draws mucosal tissue against the carrier and prevents movement of the sphincter region while the electrode penetrates {HEAD ~ tissue} 
The application of { TAIL ~ vacuum } draws mucosal tissue against the carrier and prevents movement of the sphincter region while the electrode penetrates { HEAD ~ tissue }
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD