Abstract:
IMPORTANCE:Minimally invasive parathyroidectomy using intraoperative parathyroid hormone monitoring remains the standard approach to the majority of patients with primary hyperparathyroidism. This study demonstrates that individual patient characteristics do not affect existing criteria for intraoperative parathyroid hormone monitoring. OBJECTIVE:To identify patient characteristics, such as age, sex, race, body mass index (BMI), and renal function, that may affect existing criteria for intraoperative parathyroid hormone (IOPTH) levels during minimally invasive parathyroidectomy. DESIGN:Retrospective review of a prospectively collected parathyroid database populated from August 2005 to April 2011. SETTING:Academic medical center. PARTICIPANTS:Three hundred six patients with sporadic primary hyperparathyroidism who underwent initial parathyroidectomy between August 2005 and April 2011. INTERVENTIONS:All patients underwent minimally invasive parathyroidectomy with complete IOPTH information. MAIN OUTCOME AND MEASURES:Individual IOPTH kinetic profiles were fitted with an exponential decay curve and individual IOPTH half-lives were determined. Univariate and multivariate analyses were performed to determine the association between patient demographics or laboratory data and IOPTH half-life. RESULTS:Mean age of the cohort was 60 years, 78.4% were female, 90.2% were white, and median BMI was 28.3. Overall, median IOPTH half-life was 3 minutes, 9 seconds. On univariate analysis, there was no association between IOPTH half-life and patient age, renal function, or preoperative serum calcium or parathyroid hormone levels. Age, BMI, and an age × BMI interaction were included in the final multivariate median regression analysis; race, sex, and glomerular filtration rate were not predictors of IOPTH half-life. The IOPTH half-life increased with increasing BMI, an effect that diminished with increasing age and was negligible after age 55 years (P = .001). CONCLUSIONS AND RELEVANCE:Body mass index, especially in younger patients, may have a role in the IOPTH half-life of patients undergoing parathyroidectomy. However, the differences in half-life are relatively small and the clinical implications are likely not significant. Current IOPTH criteria can continue to be applied to all patients undergoing parathyroidectomy for sporadic primary hyperparathyroidism.
journal_name
JAMA Surgjournal_title
JAMA surgeryauthors
Leiker AJ,Yen TW,Eastwood DC,Doffek KM,Szabo A,Evans DB,Wang TSdoi
10.1001/jamasurg.2013.104subject
Has Abstractpub_date
2013-07-01 00:00:00pages
602-6issue
7eissn
2168-6254issn
2168-6262pii
1686275journal_volume
148pub_type
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