Comparison of Post-Tonsillectomy Hemorrhage Rate After Different Tonsillectomy Techniques: Systematic Review and Meta Analysis.

Introduction: Post-tonsillectomy hemorrhage is a serious complication that varies according to the surgical technique used, potentially compromising patient safety and recovery. Even though several techniques were frequently used, including cold steel dissection, coblation, monopolar diathermy, and bipolar diathermy, there were certain discrepancies in hemorrhage rates in the literature. This meta-analysis aims to compare the rates of primary and secondary hemorrhage among these surgical techniques, with a focus on guiding clinical decision-making. Methodology: A total of 12 studies, published between 2005 and 2024, were selected from the PubMed, Web of Science, Scopus, and Cochrane Library databases, comprising 1684 participants from both pediatric and adult groups. Primary and secondary hemorrhage rates, surgical techniques, and study characteristics were extracted as data. Therefore, the aim of performing this meta-analysis with random-effects models was to calculate pooled estimates for hemorrhage rates and the heterogeneity index (I²). The techniques studied included cold steel dissection, coblation, monopolar diathermy, and bipolar diathermy. Results: The pooled primary hemorrhage rate across all techniques was 1.0% (95% Cl: 0.5-1.4%), with insignificant heterogeneity (I² = 0.0%, p < 0.665). By contrast, pooled secondary hemorrhage occurred at a rate of 5.8% (95% CI: 3.9-7.6%). Cold steel tonsillectomy was associated with the lowest secondary hemorrhage rate of 3.7% (95% CI: 0.8-6.6%, I² = 43.558%, p = 0.115), while bipolar diathermy had the highest secondary hemorrhage rate of 8.6% (95% CI: 2.3-15.0%, I² = 86.448%, p < 0.001). Conclusions: This meta-analysis underscores the considerable variability in rates of post-tonsillectomy hemorrhage frequency among various surgical techniques. Cold steel dissection appears to be the safest regarding secondary hemorrhage, while coblation likely minimizes primary bleeding. Bipolar diathermy comes across as the technique with the highest risk for primary hemorrhage and requires special caution during its use. Such results emphasize the need for careful selection of the surgical technique concerning patients' particular conditions and the need to enhance care periods to reduce the bearing of any hemorrhagic complications.