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367 A RETROSPECTIVE MEDICAL RECORD REVIEW TO EVALUATE THE EFFECTIVENESS OF MINI-INCISION AND TWO-INCISION MINIMALLY INVASIVE SURGERY IN REDUCING COMPLICATIONS AND REHABILITATION TIME IN PATIENTS UNDERGOING TOTAL HIP REPLACEMENT
  1. R. Cohen,
  2. J. Katz,
  3. S. Slagis,
  4. N. Sampatacos,
  5. M. Rhodes,
  6. N. Skrepnik
  1. Tucson, AZ.

Abstract

Nearly 500,000 total hip replacements are being done annually. In hopes of reducing the pain and recovery time for these patients, development of less-invasive procedures has been a topic of interest among orthopedists. The purpose of this study is to obtain intraoperative and postoperative data to compare three different total hip arthroplasty procedures: standard (10-12 in. incision), mini-incision (2.5-3.5 in. incision), and the 2-incision approach (1.5 inches each). This study will provide information to determine if minimally invasive surgery (MIS) can reduce rehabilitation time and complication rates when compared to the standard approach. In addition, the learning curve for the challenging two-incision MIS will be determined for three different surgeons over a 17-month period. It is hypothesized that the two-incision MIS approach will reduce rehabilitation time and the number and severity of complications for the 60-day postoperative period. The study is a retrospective chart review of all THAs done by Russell Cohen, MD; Jay Katz, MD; and Scott Slagis, MD from December 31, 2002 through May 31, 2004. The primary endpoints include: length of hospital stay, discharge location, transfusion rates, number and severity of complications for the period of 60-days following surgery, estimated blood loss, length of surgery, operating room staff, number of physical therapy sessions, BMI, incision length, and blood products. Following completion of data entry, statistical analysis will be performed by a biostatistician designated by the sponsor (Zimmer, Inc). Analysis will include mean, standard deviation, max, min, mode, median, and an ANOVA test to the level of p=0.05. This study has the potential to contribute to the understanding of whether MIS is effective in reducing rehabilitation time and complication rates. This information could be beneficial to future hip replacement patients. In addition, knowledge pertaining to the number of surgeries required in order to become proficient in this procedure will aid surgeons who are considering implementation of these methods.

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