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Risk factors for postoperative hypocalcemia after surgery for primary hyperparathyroidism

Westerdahl, J LU ; Lindblom, P LU ; Valdemarsson, S LU ; Tibblin, Sten and Bergenfelz, A LU (2000) In Archives of Surgery 135(2). p.7-142
Abstract

HYPOTHESIS: A variety of clinical and biochemical variables may be associated with hypocalcemia after surgery for parathyroid adenoma.

DESIGN: A prospective study of patients who underwent surgery for solitary parathyroid adenoma.

SETTING: A university hospital department of surgery.

PATIENTS: Eighty-six consecutive patients who underwent surgery for solitary parathyroid adenoma.

INTERVENTION: Parathyroidectomy according to the principles of unilateral neck exploration.

MAIN OUTCOME MEASURES: Clinical and biochemical risk factors for early (< or =4 days after surgery) and late (1 year after surgery) postoperative symptomatic and biochemical hypocalcemia.

RESULTS: Twenty-two patients developed early... (More)

HYPOTHESIS: A variety of clinical and biochemical variables may be associated with hypocalcemia after surgery for parathyroid adenoma.

DESIGN: A prospective study of patients who underwent surgery for solitary parathyroid adenoma.

SETTING: A university hospital department of surgery.

PATIENTS: Eighty-six consecutive patients who underwent surgery for solitary parathyroid adenoma.

INTERVENTION: Parathyroidectomy according to the principles of unilateral neck exploration.

MAIN OUTCOME MEASURES: Clinical and biochemical risk factors for early (< or =4 days after surgery) and late (1 year after surgery) postoperative symptomatic and biochemical hypocalcemia.

RESULTS: Twenty-two patients developed early symptomatic hypocalcemia. The difference in total serum calcium levels between patients, with and without early symptomatic hypocalcemia, was evident on the third and fourth postoperative days. Serum level of osteocalcin greater than 6.0 microg/L, bilateral neck exploration, and history of cardiovascular disease were risk factors for symptomatic hypocalcemia (odds ratios [95% confidence intervals]: 4.4 [1.4-14.1], 3.8 [1.3-11.6], and 0.1 [0.02-0.60], respectively). Patients with up to 1 risk factor had a possibility of only 7% to develop early symptomatic hypocalcemia. One year after surgery, 16 patients had low levels of total serum calcium (late biochemical hypocalcemia) and were asymptomatic. Preoperative intermittent hypercalcemia was associated with an increased risk for late biochemical hypocalcemia (odds ratio, 3.9; 95% confidence interval, 1.0-16.3).

CONCLUSIONS: Clinical and biochemical risk factors for early and late postoperative hypocalcemia in patients who underwent surgery for solitary parathyroid adenoma were found. A clinically useful prognostic index for early symptomatic hypocalcemia was constructed using these risk factors.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Adenoma, Calcium, Female, Follow-Up Studies, Humans, Hyperparathyroidism, Hypocalcemia, Male, Middle Aged, Parathyroid Neoplasms, Parathyroidectomy, Postoperative Complications, Prognosis, Prospective Studies, Time Factors, Journal Article
in
Archives of Surgery
volume
135
issue
2
pages
6 pages
publisher
American Medical Association
external identifiers
  • scopus:0033950135
ISSN
0004-0010
DOI
10.1001/archsurg.135.2.142
language
English
LU publication?
yes
id
c06eed1b-b9b9-4364-b5f2-10830d88bf4f
date added to LUP
2017-05-10 17:36:49
date last changed
2017-05-14 04:51:07
@article{c06eed1b-b9b9-4364-b5f2-10830d88bf4f,
  abstract     = {<p>HYPOTHESIS: A variety of clinical and biochemical variables may be associated with hypocalcemia after surgery for parathyroid adenoma.</p><p>DESIGN: A prospective study of patients who underwent surgery for solitary parathyroid adenoma.</p><p>SETTING: A university hospital department of surgery.</p><p>PATIENTS: Eighty-six consecutive patients who underwent surgery for solitary parathyroid adenoma.</p><p>INTERVENTION: Parathyroidectomy according to the principles of unilateral neck exploration.</p><p>MAIN OUTCOME MEASURES: Clinical and biochemical risk factors for early (&lt; or =4 days after surgery) and late (1 year after surgery) postoperative symptomatic and biochemical hypocalcemia.</p><p>RESULTS: Twenty-two patients developed early symptomatic hypocalcemia. The difference in total serum calcium levels between patients, with and without early symptomatic hypocalcemia, was evident on the third and fourth postoperative days. Serum level of osteocalcin greater than 6.0 microg/L, bilateral neck exploration, and history of cardiovascular disease were risk factors for symptomatic hypocalcemia (odds ratios [95% confidence intervals]: 4.4 [1.4-14.1], 3.8 [1.3-11.6], and 0.1 [0.02-0.60], respectively). Patients with up to 1 risk factor had a possibility of only 7% to develop early symptomatic hypocalcemia. One year after surgery, 16 patients had low levels of total serum calcium (late biochemical hypocalcemia) and were asymptomatic. Preoperative intermittent hypercalcemia was associated with an increased risk for late biochemical hypocalcemia (odds ratio, 3.9; 95% confidence interval, 1.0-16.3).</p><p>CONCLUSIONS: Clinical and biochemical risk factors for early and late postoperative hypocalcemia in patients who underwent surgery for solitary parathyroid adenoma were found. A clinically useful prognostic index for early symptomatic hypocalcemia was constructed using these risk factors.</p>},
  author       = {Westerdahl, J and Lindblom, P and Valdemarsson, S and Tibblin, Sten and Bergenfelz, A},
  issn         = {0004-0010},
  keyword      = {Adenoma,Calcium,Female,Follow-Up Studies,Humans,Hyperparathyroidism,Hypocalcemia,Male,Middle Aged,Parathyroid Neoplasms,Parathyroidectomy,Postoperative Complications,Prognosis,Prospective Studies,Time Factors,Journal Article},
  language     = {eng},
  number       = {2},
  pages        = {7--142},
  publisher    = {American Medical Association},
  series       = {Archives of Surgery},
  title        = {Risk factors for postoperative hypocalcemia after surgery for primary hyperparathyroidism},
  url          = {http://dx.doi.org/10.1001/archsurg.135.2.142},
  volume       = {135},
  year         = {2000},
}