# Postoperative Pain Management Strategies Without Regional Analgesia in Knee Surgeries: A Scoping Review

## TL;DR

This review summarizes non-regional pain management strategies for knee surgeries when regional blocks are not possible, highlighting gaps in evidence and the need for standardized approaches.

## Contribution

The study provides a comprehensive overview of non-regional analgesia strategies for knee surgeries, identifying key gaps and areas for future research.

## Key findings

- Multimodal approaches combining systemic and local analgesics are commonly used but show limited evidence on functional recovery.
- There is substantial heterogeneity in study designs and outcomes across different knee surgery types.
- Few studies focus on tibial plateau or distal femoral fractures, and evidence is largely limited to inpatient outcomes.

## Abstract

Background/Objectives: Intensive postoperative pain is a common challenge after knee surgeries such as total knee arthroplasty, arthroscopy, cruciate ligament or meniscus repair, and fixation of tibial plateau or distal femoral fractures. This scoping review mapped and summarized non-regional postoperative analgesia strategies to provide an overview of available approaches when regional blocks or neuraxial anesthesia are not feasible. Methods: We followed established methodological guidance for scoping reviews and report the data in accordance with the PRISMA-ScR checklist. We searched PubMed/MEDLINE, EMBASE, Scopus, and ClinicalTrials.gov in January 2025. Eligible designs included randomized controlled trials, non-randomized trials, observational studies, case series, and pilot studies. Results: We screened 3390 records and assessed 332 in full text. A total of 43 studies met the inclusion criteria, and the literature was grouped into: (1) arthroplasty, (2) arthroscopy, (3) cruciate ligament or meniscus repair, and (4) tibial plateau or distal femoral fractures. We identified substantial heterogeneity in interventions, comparators, and outcome measures across the first three sets of literature but found no focused articles for tibial plateau or distal femoral fractures. Most studies evaluated multimodal approaches combining systemic analgesics with local periarticular or intraarticular techniques. Evidence on functional recovery and mobilization was limited. Conclusions: Current evidence on non-regional postoperative analgesia in knee surgery is fragmented and varies considerably in design, intervention, and reported outcomes. Multimodal regimens and pre-emptive NSAID use were frequently associated with reduced early postoperative pain and lower opioid requirements, although comparability across studies remains limited. As existing evidence largely focuses on outcomes during hospitalization, future research should prioritize standardized pain and functional outcome reporting and directly compare systemic and local multimodal strategies, while extending follow-up beyond discharge to better characterize sustained clinical relevance.