title: Outcome in primary cemented total knee arthroplasty with or without drain: A prospective comparative study.
abstract: BACKGROUND
  Suction drain insertion is a common practice in orthopedic surgery, especially after joint arthroplasty to prevent the formation of a hematoma. Theoretically the use of a drain should diminish the volume of hematoma; however the literature has conflicting data. Some authors state that drainage evacuates fluid from a limited area only and can be a cause of infection due to retrograde migration of bacteria. It can also impair the early postoperative rehabilitation. The aim of this study was to evaluate the clinical outcome (especially postoperative pain) and intake of analgesics in patients who had undergone primary cemented total knee arthroplasty (TKA) with or without a postoperative drain.
  
  
  METHODS
  A prospective comparative study of 108 consecutive patients (121 knees) was conducted. They were divided into two groups: A study group, with no drainage and a control group with drain inserted at the end of surgery. A total of 121 patients were recruited into two groups. A study group consisted of 59 knees, in which we did not use drainage after TKA and a control group with 62 knees, in which drain was inserted post surgery. Both groups were comparable in terms of preoperative characteristics. The indication for TKA was osteoarthritis (n = 105) and rheumatoid arthritis (n = 16).
  
  
  RESULTS
  In patients without drainage we observed lower need for opioids, higher blood loss on the 1(st) postoperative day and a lower need for change of dressings. There were no statistically significant differences in terms of total blood loss, hidden blood loss, transfusion rate, range of motion, length of hospital stay or incidence of complications between the two groups. In 1 year observation there were no differences in clinical outcome between the two groups.
  
  
  CONCLUSIONS
  The present study conclude that there is no rationale for the use of drain after primary TKA. There are benefits in terms of lower opioid intake, lower blood loss on the first postoperative day and lower need for dressing reinforcement during hospitalization.
authors.affiliation: Department of Reconstructive Surgery and Arthroscopy of the Knee Joint, Medical University of Łódź, 91-002 Łódź, 75 Drewnowska, Poland.
authors.forename: Rafał
authors.initials: R
authors.lastname: Kęska
authors.affiliation: Department of Reconstructive Surgery and Arthroscopy of the Knee Joint, Medical University of Łódź, 91-002 Łódź, 75 Drewnowska, Poland ; Department of Orthopedics, Sunderby Central Hospital of Norrbotten, SE-971 80 Luleå, Sweden.
authors.forename: T Przemysław
authors.initials: TP
authors.lastname: Paradowski
authors.affiliation: Department of Reconstructive Surgery and Arthroscopy of the Knee Joint, Medical University of Łódź, 91-002 Łódź, 75 Drewnowska, Poland.
authors.forename: Dariusz
authors.initials: D
authors.lastname: Witoński
keywords: Arthroplasty; Blood loss; blood loss; drain; dressing reinforcement; knee; opioids; replacement; surgical drainage suction; total knee arthroplasty