Document Detail

Intraoperative monitoring of parathyroid procedures by a 15-minute parathyroid hormone immunochemiluminometric assay.
MedLine Citation:
PMID:  8189758     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To report the recent development and validation of a sensitive 15-minute immunochemiluminometric assay (ICMA) of parathyroid hormone (PTH).
DESIGN: The characteristics and applications of a new "rapid" PTH ICMA are described, and the advantages in comparison with other assays are discussed.
MATERIAL AND METHODS: The 15-minute PTH ICMA was achieved by using a higher incubation temperature (45 degrees C rather than room temperature) and a concentration of tracer antibodies that was 5 times that in the regular 18-hour assay. The sensitivity, recovery, and linearity of dilution of the rapid ICMA were assessed, as was its ability to reflect intraoperative changes in PTH concentration after parathyroidectomy in patients with hyperparathyroidism.
RESULTS: The sensitivity of the ICMA was 0.3 pmol/L in comparison with 0.08 pmol/L for the regular 18-hour assay (normal range, 1.0 to 5.0). The recovery of added PTH was 84% by using ethylene-diaminetetraacetic acid-plasma as the specimen. Moreover, the linearity of specimens after dilution was good. The assay demonstrated a rapid response to parathyroid gland removal. In most patients, PTH levels declined precipitously (to less than 30% of basal values) within 5 minutes after parathyroid resection. PTH levels remained low to undetectable at 10 and 20 minutes after excision.
CONCLUSION: This rapid PTH ICMA may be of assistance to endocrine surgeons in the monitoring of PTH function after both parathyroid and thyroid surgical procedures.
P C Kao; J A van Heerden; R L Taylor
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Mayo Clinic proceedings     Volume:  69     ISSN:  0025-6196     ISO Abbreviation:  Mayo Clin. Proc.     Publication Date:  1994 Jun 
Date Detail:
Created Date:  1994-06-21     Completed Date:  1994-06-21     Revised Date:  2013-12-13    
Medline Journal Info:
Nlm Unique ID:  0405543     Medline TA:  Mayo Clin Proc     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  532-7     Citation Subset:  AIM; IM    
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MeSH Terms
Hyperparathyroidism / surgery
Immunoassay / methods*
Luminescent Measurements
Monitoring, Intraoperative / methods*
Parathyroid Hormone / blood*
Sensitivity and Specificity
Time Factors
Reg. No./Substance:
0/Parathyroid Hormone
Comment In:
Mayo Clin Proc. 1994 Jun;69(6):605   [PMID:  8189772 ]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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