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Ionized Calcium Changes for Predicting Postoperative Hypocalcemia After Total Thyroidectomy

Predictive Value of Preoperative, Intraoperative, and Postoperative Ionized Calcium Changes Measured by Blood Gas Analysis for Postoperative Hypocalcemia After Total Thyroidectomy

Status
Completed
Phases
Unknown
Study type
Observational
Source
ClinicalTrials.gov
Registry ID
NCT07701824
Enrollment
327
Registered
2026-07-14
Start date
2025-06-12
Completion date
2026-07-05
Last updated
2026-07-14

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Postoperative Hypocalcemia, Postoperative Hypoparathyroidism, Total Thyroidectomy

Keywords

ionized calcium, blood gas analysis, total thyroidectomy, postoperative hypocalcemia, postoperative hypoparathyroidism, calcium monitoring

Brief summary

This prospective observational study aims to evaluate whether changes in ionized calcium levels measured by blood gas analysis during the preoperative, intraoperative, and postoperative periods can predict postoperative hypocalcemia in patients undergoing total thyroidectomy. Ionized calcium values obtained at predefined perioperative time points will be compared with postoperative biochemical and clinical hypocalcemia outcomes.

Detailed description

Postoperative hypocalcemia is a common complication after total thyroidectomy and may be associated with changes in calcium homeostasis and parathyroid function. Early identification of patients at risk for postoperative hypocalcemia may help guide postoperative monitoring and calcium replacement strategies. This prospective observational study included patients who underwent total thyroidectomy. Ionized calcium levels were measured by blood gas analysis at predefined perioperative time points, including the preoperative, intraoperative, and postoperative periods. Serum parathyroid hormone levels were also recorded. The study evaluated the relationship between perioperative changes in ionized calcium levels, postoperative parathyroid hormone changes, and the development of postoperative hypocalcemia. The primary objective was to determine whether perioperative ionized calcium changes can predict postoperative hypocalcemia after total thyroidectomy. Secondary objectives included evaluating the association between postoperative parathyroid hormone changes and postoperative hypocalcemia and assessing the diagnostic performance of ionized calcium measurements for predicting hypocalcemia.

Interventions

DIAGNOSTIC_TESTCalcium

Ionized calcium levels will be measured by blood gas analysis at predefined preoperative, intraoperative, and postoperative time points in patients undergoing total thyroidectomy.

Sponsors

Emrecan Deniz
Lead SponsorOTHER_GOV

Study design

Observational model
COHORT
Time perspective
PROSPECTIVE

Eligibility

Sex/Gender
ALL
Age
18 Years to 75 Years

Inclusion criteria

* Patients aged 18 to 75 years * Present to the General Surgery Clinic of Başakşehir Çam and Sakura City Hospital * Diagnosis of thyroid disorders according to ICD code E07 * Scheduled to undergo total thyroidectomy due to toxic multinodular goiter, multinodular goiter, or papillary carcinoma * Provide informed consent to participate in the study.

Exclusion criteria

* Patients with preoperative parathyroid disorders associated hypocalcemia or hypercalcemia. * Patients with a history of previous thyroidectomy * Patients with a history of previous parathyroidectomy * Patients with a history of previous neck surgery. * Patients with chronic kidney disease. * Patients with a history of non-thyroid malignancy.

Design outcomes

Primary

MeasureTime frameDescription
ionized calciumPreoperative baseline; postoperative 10 minutes; postoperative 6 hoursIonized calcium levels will be measured by blood gas analysis at predefined preoperative and postoperative time points in patients undergoing total thyroidectomy.
parathormone levelsPreoperative baseline; postoperative 10 minutes; postoperative 6 hours; and postoperative 6 monthsSerum parathyroid hormone levels will be measured in patients undergoing total thyroidectomy to evaluate the association between postoperative parathyroid hormone changes and postoperative hypocalcemia.

Countries

Turkey (Türkiye)

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Jul 15, 2026