Does postoperative drainage influence early pain after total knee arthroplasty? A randomized comparative study

Area of Science:

• Orthopedic Surgery
• Pain Management
• Arthroplasty Research

Background:

• Postoperative drainage after total knee arthroplasty (TKA) is debated, especially with advanced blood conservation methods.
• The impact of drains on early postoperative pain following TKA is not well-established.

Purpose of the Study:

• To investigate whether postoperative drainage affects early pain outcomes in primary TKA patients.
• To compare pain scores and opioid requirements between TKA patients with and without drains.

Main Methods:

• An assessor-blinded randomized comparative study of 60 primary TKA patients.
• Patients were randomized into drainage or no-drainage groups, receiving identical anesthetic, surgical, and multimodal analgesic protocols, including tranexamic acid.
• Pain was assessed using the visual analogue scale (VAS) and morphine rescue doses were recorded.

Main Results:

• No significant differences in VAS pain scores, morphine use, hemoglobin levels, or hospital stay were found between groups.
• Both drainage and no-drainage groups showed reduced postoperative pain compared to preoperative levels.
• Higher BMI correlated with increased preoperative pain but not postoperative outcomes.

Conclusions:

• Routine postoperative drainage does not enhance early pain control or decrease opioid needs in primary TKA.
• Current perioperative protocols, including tranexamic acid, allow for the omission of routine drains without compromising early pain management.
• Findings support the discontinuation of routine drainage in TKA to potentially streamline recovery.