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Medical Leech Therapy for Knee OA — Systematic Review and Meta-Analysis

Pooled analysis of 3 RCTs and 1 controlled clinical trial (237 patients) finding moderate to strong evidence for symptom reduction in knee osteoarthritis

Zuletzt aktualisiert: 1. November 2026Geprüft von: ASH Editorial Board
Forschungsartikel — EvidenzübersichtArtikelreferenz
Evidenz: MetaanalyseKlinische LiteraturLauche R et al. · Clinical Journal of Pain, 2014

Abstract

OBJECTIVES: Osteoarthritis of the knee is a common chronic disease among older adults. Therapeutic approaches mainly consist of physiotherapy or pharmacological therapy, but these approaches are limited over time by their cost and/or side effects. This paper presents a systematic review and meta-analysis of the effectiveness of medical leech therapy for osteoarthritis of the knee. METHODS: The PubMed/MEDLINE, Cochrane Library, EMBASE, Scopus, and CAMBASE databases were screened in August 2012 to identify randomized (RCTs) and nonrandomized controlled clinical trials (CCTs) comparing leech therapy to control conditions. Main outcome measures were pain, functional impairment, and joint stiffness. For each outcome, standardized mean differences (SMD) and 95% confidence intervals were calculated. RESULTS: Three RCTs and 1 CCT were found, in which a total of 237 patients with osteoarthritis were included. Three trials had a low risk of bias. There was strong overall evidence for immediate (SMD=-1.05; P<0.01) and short-term pain reduction (SMD=-1.00; P<0.01), immediate improvement in patients' physical function (SMD=-0.72; P<0.01), and both immediate (SMD=-0.88; P=0.04) and long-term improvement in their joint stiffness (SMD=-0.62; P<0.01). Moderate evidence was found for leech therapy's short-term effects on physical function (SMD=-0.46; P<0.01) and long-term effects on pain (SMD=-0.45; P<0.01). Leech therapy was not associated with any serious adverse events. DISCUSSION: This systematic review found moderate to strong evidence for the reduction of pain, functional impairment, and joint stiffness after medical leech therapy in patients with osteoarthritis of the knee. Given the low number of reported adverse events, leech therapy may be a useful approach in treating this condition. Further high-quality RCTs are required for the conclusive judgment of its effectiveness and safety.

Abstract aus PubMed (NCBI) für den zitierten Eintrag, in der Originalsprache wiedergegeben. Maßgeblich ist die Fassung der Originalpublikation.

Das Abstract wird nicht übersetzt, damit die eigene Wortwahl der Autoren erhalten bleibt.

PublikationstypJournal ArticleMeta-AnalysisResearch Support, Non-U.S. Gov'tSystematic Review
Indexierte MeSH-BegriffeArthralgiaCausalityComorbidityEvidence-Based MedicineHumansLeechingOsteoarthritis, KneePrevalenceRecovery of FunctionRisk FactorsTreatment Outcome

Zusammenfassung

Systematic review and meta-analysis pooling data from 3 randomized and 1 nonrandomized controlled clinical trial (237 patients) of medical leech therapy for knee osteoarthritis. Found strong evidence for immediate (SMD=-1.05; P<0.01) and short-term pain reduction (SMD=-1.00; P<0.01), immediate improvement in physical function (SMD=-0.72) and in joint stiffness (SMD=-0.88; P=0.04), and moderate evidence for long-term effects on pain (SMD=-0.45; P<0.01); three trials had a low risk of bias and no serious adverse events were associated with leech therapy.

Zitation

Literaturangabe (Vancouver-Stil)

Lauche R, Cramer H, Langhorst J, Dobos G. A Systematic Review and Meta-Analysis of Medical Leech Therapy for Osteoarthritis of the Knee. Clin J Pain. 2014;30(1):63-72. doi:10.1097/AJP.0b013e31828440ce. PMID: 23446069

Die bibliografischen Angaben (Autoren, Band, Seiten, DOI) stammen aus dem PubMed-Eintrag.

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