title: Popliteal blocks for foot and ankle surgery: success rate and contributing factors.
abstract: The purpose of the present study was to evaluate the factors contributing to the success of popliteal nerve blocks performed by podiatric surgical residents in various stages of training. A retrospective review was conducted of 143 consecutively performed blocks during a 2-year period. A total of 29 blocks using a lateral approach and 114 blocks using a modified posterior approach were performed. The intrinsic and extrinsic variables contributing to block outcome were analyzed. A total of 109 successful blocks were performed, for an overall success rate of 76.2%. Significant differences (p < .002) were found between the success and failure groups with respect to the patients body mass index and age. No differences were observed between the success and failure groups with respect to the block approach or months of resident training. In conclusion, podiatric surgical residents in all stages of training can safely and effectively perform popliteal nerve blocks for peri- and postoperative analgesia. Surgeons should be aware of the potential influence of patients body mass index and age on the overall block success rates.
authors.affiliation: Resident, Foot and Ankle Surgery, Franciscan Health System, Federal Way, WA. Electronic address: KennethHegewald@fhshealth.org.
authors.forename: Kenneth
authors.initials: K
authors.lastname: Hegewald
authors.affiliation: Podiatrist, St. Cloud Orthopedics, Sartell, MN.
authors.forename: Kevin
authors.initials: K
authors.lastname: McCann
authors.affiliation: Anesthesiologist, Department of Anesthesia, Franciscan Health System, Tacoma, WA.
authors.forename: Andrew
authors.initials: A
authors.lastname: Elizaga
authors.affiliation: Director, Franciscan Foot and Ankle Institute; and Medical Director, Foot and Ankle Service, Franciscan Health System, Federal Way, WA.
authors.forename: Byron L
authors.initials: BL
authors.lastname: Hutchinson
mesh_terms: D000328:Adult; D000368:Aged; D000842:Ankle / Q000601:surgery*; D005260:Female; D005528:Foot / Q000601:surgery*; D006801:Humans; D007717:Knee; D008297:Male; D008875:Middle Aged; D009407:Nerve Block; D019637:Orthopedic Procedures; D010149:Postoperative Pain / Q000188:drug therapy*; D012189:Retrospective Studies
keywords: anesthesia; nerve; popliteal fossa; regional; surgery