title: Case-controlled comparison of video-assisted and conventional minimally invasive parathyroidectomy.
abstract: Video-assisted parathyroidectomy (VAP) is a new approach to parathyroid exploration for primary hyperparathyroidism (PH). We examined the VAP learning curve and hypothesized that compared with conventional minimally invasive parathyroidectomy (MIS), VAP has similar complication rates  and the added benefit of a shorter hospital length of stay. Using a case-control study design, patients with PH with single-focus imaging results undergoing VAP or MIS were compared during a 5-year VAP implementation period. VAP was possible in 18 per cent of patients undergoing initial parathyroid  exploration. In comparing 125 VAP cases with 95 MIS control subjects, patients undergoing MIS had higher mean preoperative levels of calcium (P = 0.007) and parathyroid hormone (P = 0.008), greater mean adenoma weight (P < 0.001), and increased long-term mortality (4%  MIS vs 0% VAP, P = 0.03). Mean operative time, in-house analgesia use, and operative complications did not differ. The rate of conversion from VAP to MIS was 14 per cent. Patients undergoing VAP were less likely to require an overnight hospital stay (P = 0.01). VAP is  a safe surgical option for selected patients with PH, offering improved cosmesis with operative times comparable to conventional MIS. VAP can be done with a low conversion rate even during implementation and allows the added benefit of shorter hospital stay.
authors.affiliation: Department of Surgery, University of British Columbia Faculty of Medicine, Vancouver, British Columbia, Canada.
authors.forename: Adrienne L
authors.initials: AL
authors.lastname: Melck
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Armstrong
authors.forename: Linwah
authors.initials: L
authors.lastname: Yip
authors.forename: Sally E
authors.initials: SE
authors.lastname: Carty
mesh_terms: D016022:Case-Control Studies; D005260:Female; D006801:Humans; D049950:Hyperparathyroidism, Primary / Q000601:surgery*; D007902:Length of Stay / Q000706:statistics & numerical data; D008297:Male; D008875:Middle Aged; D019060:Minimally Invasive Surgical Procedures; D016105:Parathyroidectomy / Q000379:methods*; D012189:Retrospective Studies; D016896:Treatment Outcome; D020535:Video-Assisted Surgery