Laxity Profiles in the Native and Replaced Knee-Application to Robotic-Assisted Gap-Balancing Total Knee Arthroplasty.

Background: The traditional goal of the gap-balancing method in total knee arthroplasty is to create equal and symmetric knee laxity throughout the arc of flexion. The purpose of this study was to (1) quantify the laxity in the native and the replaced knee throughout the range of flexion in gap-balancing total knee arthroplasty (TKA) and (2) quantify the precision in achieving a targeted gap profile throughout flexion using a robotic-assisted technique with active ligament tensioning.

Methods: Robotic-assisted, gap-balancing TKA was performed in 14 cadaver specimens.

Surgery for short esophagus with stricture: an experimental and clinical manometric study.

The surgical management of short esophagus with stricture has been simplified in recent years by the introduction of an esophageal lengthening procedure (Collis gastroplasty) combined with antireflux maneuvers, such as the Belsey and Nissen operations. This report compares the experimental and clinical manometric findings after these procedures. After myectomy of the lower esophageal sphincter (LES) in the cat, three experimental groups were developed including Collis gastroplasty, Collis-Belsey and Collis-Nissen.