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  • Title: Instrumentation and patient characteristics that influence postoperative haemorrhage rates following tonsil and adenoid surgery.
    Author: Tomkinson A, De Martin S, Gilchrist CR, Temple M.
    Journal: Clin Otolaryngol; 2005 Aug; 30(4):338-46. PubMed ID: 16209676.
    Abstract:
    OBJECTIVES: To investigate the effect of the type instrumentation used and the age and gender characteristics of patients on postoperative haemorrhage rates following tonsil and adenoid surgery. DESIGN: A retrospective analysis of 13 593 procedures was performed from The Patient Episode Database for Wales between 1 January 1999 and 31 March 2004. SETTING: National health policy changes created four periods of different instrument usage (reusable, single-use with diathermy, single-use alone, specified single-use with diathermy). These and the age and gender distribution of the patients were examined against four categories of postoperative haemorrhage. MAIN OUTCOME MEASURES: Postoperative haemorrhage rates were expressed as the number of complications per operations performed. Primary postoperative haemorrhage that occurred during the initial admission either required a return to theatre [R1] or was managed conservatively [N1]; secondary postoperative haemorrhage that required a return to hospital either returned to theatre [R2] or was managed conservatively [N2], were compared. RESULTS: Primary haemorrhage with return to theatre doubled, from the baseline rate with reusable instruments, from 0.6% (CI 0.5-0.8) to 1.2% (CI 0.7-1.9) when single-use instruments were introduced and remained high at 1.4% (CI 0.9-2.1) after the withdrawal of single-use diathermy. This haemorrhage rate returned to the baseline rate (0.6% CI 0.3-1.0) when specified single-use instruments were introduced. None of the other haemorrhage rates changed significantly throughout the four observation periods. Adenotonsillectomy and tonsillectomy patients have different age and gender patterns. In a univariate analysis, males over the age of 12 years were twice as likely to have haemorrhage with return to theatre than girls of the same age, 3.8% (CI 3.0-4.7) versus 1.7% (CI 1.4-2.1). CONCLUSIONS: A significant rise in serious postoperative primary haemorrhage but not secondary haemorrhage was seen following the initial introduction of single-use instruments that reverted to baseline with the introduction of specified single-use instruments. Diathermy does not appear to have affected the haemorrhage rates. There is a distinct age and gender pattern for tonsil and adenoid surgery and risk of postoperative haemorrhage. The use of arbitrary divisions of age may be misleading in studies that examine post-tonsillectomy haemorrhage.
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