title: Use of intraoperative parathyroid hormone measurement does not improve success of bilateral neck exploration for hyperparathyroidism.
abstract: OBJECTIVE
  Use of intraoperative measurement of intact parathyroid hormone (iPTH) to confirm complete excision of hyperfunctioning parathyroid tissue does not improve overall operative success rates.
  
  
  METHODS
  Case series of patients undergoing parathyroidectomy with or without intraoperative iPTH measurement.
  
  
  METHODS
  University teaching hospital.
  
  
  METHODS
  Fifty patients undergoing parathyroidectomy before our institution of intraoperative iPTH sampling in March 1999 (group 1) were compared with 50 patients undergoing parathyroidectomy after this technique was adopted (group 2). Overall, 100 patients underwent operation between December 1996 and May 2000. Serum calcium and iPTH levels were measured at 1- and 3-month intervals. Intraoperative frozen sections and operative times were also analyzed.
  
  
  RESULTS
  Mean preoperative calcium levels were 2.85 and 2.82 mmol/L (11.4 and 11.3 mg/dL) in groups 1 and 2, respectively. One-month postoperative calcium values were identical in both groups at 2.35 mmol/L (9.4 mg/dL) (group 1 SD = 0.18 [0.74], group 2 SD = 0.20 [0.82]). At 1 month, all but 1 patient in group 1 had normalized calcium values (2% failure rate), while 3 patients in group 2 (6%) remained hypercalcemic. All 3 patients in group 2 had intraoperative iPTH levels that returned to normal. There was a significant difference in the number of intraoperative frozen sections between groups, with a mean (SD) of 3.4 (1.7) in group 1 and 2.0 (1.6) in group 2 (P<.01). There was no significant difference in operative times between groups.
  
  
  CONCLUSIONS
  Use of intraoperative iPTH sampling did not significantly affect the overall success of parathyroidectomy, as determined by postoperative normocalcemia. There was, however, a significant decrease in the number of frozen sections sent at operation.
authors.affiliation: Department of General Surgery, Rush-Presbyterian-St Luke's Medical Center, 1653 W Congress Pkwy, Chicago, IL 60612, USA.
authors.forename: F L
authors.initials: FL
authors.lastname: Starr
authors.forename: R
authors.initials: R
authors.lastname: DeCresce
authors.forename: R A
authors.initials: RA
authors.lastname: Prinz
mesh_terms: D000236:Adenoma / Q000601:surgery; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002118:Calcium / Q000097:blood; D005260:Female; D005629:Frozen Sections; D006801:Humans; D006961:Hyperparathyroidism / Q000097:blood / Q000601:surgery*; D015592:Immunoradiometric Assay; D007432:Intraoperative Period; D008297:Male; D008875:Middle Aged; D010281:Parathyroid Hormone / Q000097:blood*; D010282:Parathyroid Neoplasms / Q000601:surgery; D012086:Reoperation; D016896:Treatment Outcome
chemical_list: D010281:Parathyroid Hormone; D002118:Calcium