Postoperative Serum Calcium Levels Research Articles

The retrospective clinical study of asymptomatic primary hyperparathyroidism

Objective: To summarize and analyze the diagnostic and therapeutic characteristics of asymptomatic primary hyperparathyroidism (aPHPT). Methods: A retrospective analysis was conducted on the clinical data of 103 patients with aPHPT admitted to the Chinese PLA General Hospital from January 2012 to September 2023. The clinical characteristics, treatment modes, and prognoses of the patients were analyzed. GraphPad Prism 8.0 software was used for statistical analysis. Results: Among the 103 cases, there were 37 males and 66 females, aged from 25 to 78 years, with an average age of (53.81±11.34) years. Ninety-eight cases (95.15%) visited due to abnormal findings during physical examination and 5 cases (4.85%) due to hypertension, diabetes or other diseases. All patients underwent minimally invasive parathyroidectomy with small incision, with 96 cases (93.20%) pathologically diagnosed as adenomas and 7 cases as hyperplasia (6.80%). Postoperative mean serum calcium, parathyroid hormone (PTH) and alkaline phosphatase (ALP) levels were respectively significantly lower than preoperative levels, while postoperative serum phosphorus level was significantly higher than preoperative level (P<0.05). The mean lesion volume was (3.32±6.72)cm3 (range 0.05-49.50 cm3). Patients with different lesion volumes had significant differences in preoperative serum calcium, PTH and ALP levels. Lesion volume was positively correlated to preoperative serum calcium(ρ=0.36, P<0.01), PTH(ρ=0.50, P<0.01) and ALP(ρ=0.39, P<0.01). Among 103 patients, 94 cases were followed up (91.26%), 9 cases were lost (8.74%), and the mean follow-up period was (60.15±29.23) months. The followed-up patients were alive and had no recurrence of lesions or complications, and their blood calcium levels were normal. Conclusion: aPHPT can be preliminarily diagnosed through blood biochemistry and imaging examination, and minimally invasive surgery can offer good prognosis without serious complications.

Identification of novel risk factors for postoperative severe hypocalcemia in patients with primary hyperparathyroidism undergoing parathyroidectomy: a case control study

BackgroundPatients with primary hyperparathyroidism (PHPT) are at risk for severe hypocalcemia (SH) following parathyroidectomy (PTX), but limited data exist on the predictors of SH. We aimed to identify risk factors for early postoperative SH after PTX in patients with PHPT and to evaluate the predictive value of clinical parameters.MethodsA retrospective review of patients with PHPT who underwent PTX between January 2010 and December 2022 was performed. A total of 46 patients were included in the study, with 15 (32.6%) experiencing postoperative SH, 19 (41.3%) having calculi in the ureter or kidney, and 37 (80.4%) having osteoporosis. Patients were divided into SH and non-SH groups based on postoperative serum calcium levels. Preoperative biochemical indicators, bone turnover markers, and renal function parameters were analyzed and correlated with postoperative SH.ResultsStatistically significant (P < 0.05) differences were found in preoperative serum calcium (serum Ca), intact parathyroid hormone, serum phosphorus (serum P), serum Ca/P, percentage decrease of serum Ca, total procollagen type 1 intact N-terminal propeptide, osteocalcin (OC), and alkaline phosphatase levels between the two groups. Multivariate analysis showed that serum P (odds ratio [OR] = 0.989; 95% confidence interval [95% CI] = 0.981–0.996; P = 0.003), serum Ca (OR = 0.007; 95% CI = 0.001–0.415; P = 0.017), serum Ca/P (OR = 0.135; 95% CI = 0.019–0.947; P = 0.044) and OC levels (OR = 1.012; 95% CI = 1.001–1.024; P = 0.036) were predictors of early postoperative SH. The receiver operating characteristic curve analysis revealed that serum P (area under the curve [AUC] = 0.859, P < 0.001), serum Ca/P (AUC = 0.735, P = 0.010) and OC (AUC = 0.729, P = 0.013) had high sensitivity and specificity.ConclusionPreoperative serum P, serum Ca/P and osteocalcin levels may identify patients with PHPT at risk for early postoperative SH after PTX.

Parathyroidectomy for solitary parathyroid adenoma via trans-areola single site endoscopic approach: Results of a case-match study.

This study aimed to establish the standardized procedure of trans-areola single site endoscopic parathyroidectomy (TASSEP), and to compare the performance of TASSEP with that of conventional open parathyroidectomy (COP). This study enrolled 40 patients with primary hyperparathyroidism (PHPT) who underwent TASSEP, and included 40 of 176 PHPT patients who underwent COP based on propensity score matching. The retrospective analysis was conducted based on prospectively collected data. Perioperative outcomes, including surgical profile, surgical burden and cosmetic results and follow-up were reported. The learning curve was described using a cumulative sum (CUSUM) analysis. 40 TASSEPs were completed successfully without conversions or severe complications. There was no statistically significant difference in operation time between TASSEP and COP groups (80.83 ± 11.95 vs. 76.95 ± 7.30 min, p = 0.084). Experience of 17 cases was necessitated to reach the learning curve of TASSEP. Postoperative pain score and traumatic index (C-reactive protein and erythrocyte sedimentation rate) in TASSEP were apparently lower than those in COP group (p < 0.05). During the proliferation and stabilization phases, TASSEP was associated with significantly better incision recovery and cosmetic scores. Postoperative serum calcium and PTH levels throughout the follow-up period indicated satisfactory surgical qualities in both groups. Based on precise preoperative localization and intraoperative planning facilitated by three-dimensional (3D) virtual modeling, TASSEP can be feasibly performed on selected patients with satisfactory success rates and low complication rates, providing preferable cosmetic results and alleviating the surgical burden to a certain extent.

The value of ultrasound in combination with 99mTc-MIBI imaging department of ultrasound medicine, for the diagnosis of ectopic parathyroid glands in the thyroid gland in patients with secondary hyperparathyroidism.

To investigate the value of preoperative ultrasound combined with 99mTc-MIBI imaging for the diagnosis of ectopic intrathyroid parathyroid gland (ETPG) in patients with secondary hyperparathyroidism (SHPT). One hundred and eleven patients with SHPT who underwent total parathyroidectomy plus forearm transplantation from January 2015 to January 2022 in the Third Hospital of Hebei Medical University were selected. All patients underwent routine preoperative ultrasonography and 99mTc-MIBI imaging, and with pathological diagnosis as the gold standard, the clinical data of ETPG patients were selected, including clinical manifestations, laboratory tests, preoperative ultrasonography and 99mTc-MIBI imaging for localization and diagnosis, intraoperative exploration and postoperative pathology, and postoperative follow-up. To analyze the ultrasound manifestations of preoperative parathyroid hyperplasia and the results of 99mTc-MIBI imaging in patients with ETPG. Among 111 patients with SHPT, there were 5 patients with ETPG, 1 male and 4 females with a mean age of (45.00 ± 5.05) years, and 6 ectopic parathyroid glands were located in the thyroid gland. The incidence of ETPG was 4.5% (5/111), 4 were detected by ultrasound, 2 were not detected with a diagnostic accuracy of 66.7% (4/6), 3 were positive for 99mTc-MIBI imaging, 3 were negative with a diagnostic accuracy of 50.0% (3/6). Among them, one was not detected by ultrasound, but was positive for 99mTc-MIBI imaging, 2 with negative 99mTc-MIBI imaging, but all were detected by ultrasound, and one with negative 99mTc-MIBI imaging was detected by ultrasound but misdiagnosed as a thyroid nodule. A total of 5 ETPGs were detected by ultrasound combined with 99mTc-MIBI imaging, with a diagnostic accuracy of 83.3% (5/6). Patients' postoperative serum calcium and serum parathyroid hormone (PTH) levels were normalized or significantly decreased from preoperative levels. Ultrasound combined with 99mTc-MIBI imaging can achieve higher accuracy than either examination alone in the preoperative localization and diagnosis of ETPG in SHPT patients.

Parathyroid fine needle aspiration with PTH washout: Can it lead to parathyroid cell seeding in primary hyperparathyroidism?

Although parathyroid fine-needle aspiration (P-FNA) with parathyroid hormone (PTH) washout is effective in detecting preoperative parathyroid lesions, it also presents risks such as fibrosis, hematoma, and, in rare cases, tumor seeding. This study aimed to investigate whether P-FNA with PTH washout leads to the seeding of parathyroid cells along the path of the needle. A retrospective analysis was conducted on patients undergoing minimally invasive parathyroidectomy guided by preoperative PTH washout. Permanent pathology reports, imaging data, and postoperative serum parathyroid hormone and calcium levels were assessed to determine the effectiveness and safety of the procedure. Complications following P-FNA with PTH washout were also reviewed using data from the patient registration system of Bulent Ecevit University. The procedure accurately localized parathyroid adenomas in 87 patients who underwent ultrasound-guided parathyroidectomy following preoperative P-FNA and PTH washout. Postoperatively, 75 patients showed normal parathyroid hormone and calcium levels. Two patients required secondary surgery for contralateral adenomas. Critically, there was no evidence of P-FNA with PTH washout-induced parathyromatosis or seeding during the follow-up. Effective adenoma localization is crucial for successful minimally invasive surgery of hyperparathyroidism. Our study indicates that combining preoperative P-FNAB with PTH washout and imaging enhances adenoma detection, especially when intraoperative PTH measurements are not available, thus improving surgical outcomes. Notably, we found no evidence of cell implantation after P-FNA, suggesting the safety and efficacy of this method for preventing parathyroid cell seeding.

Predictive analysis of severe hypocalcemia following total parathyroidectomy for renal secondary hyperparathyroidism.

This study aimed to evaluate the incidence and identify risk factors for severe hypocalcemia following total parathyroidectomy (TPTX) in patients with renal secondary hyperparathyroidism (SHPT). We included patients undergoing maintenance hemodialysis or peritoneal dialysis who underwent TPTX from January 1, 2018, to April 30, 2023. Participants were categorized into groups based on postoperative corrected serum calcium levels: severe hypocalcemia (<1.8 mmol/L) and non-severe hypocalcemia (≥1.8 mmol/L). We conducted univariate analyses of demographic and laboratory data to identify potential risk factors, which were further analyzed using a binary logistic regression model. Significant associations were observed with age, dialysis duration exceeding five years, type of dialysis (peritoneal dialysis), lower preoperative corrected serum calcium, elevated preoperative intact parathyroid hormone (iPTH), and increased preoperative alkaline phosphatase (ALP) levels (all p<0.05). Age, preoperative iPTH, and ALP levels were identified as independent risk factors for severe hypocalcemia post-TPTX. Younger patients with renal SHPT who have elevated preoperative iPTH and ALP levels are at an increased risk of experiencing severe hypocalcemia following TPTX. These findings underscore the importance of careful preoperative assessment and monitoring to mitigate the risk of this complication.

Preoperative Vitamin.D Status and Post-Total Thyroidectomy Hypocalcemia.

Hypocalcemia is a common complication of total thyroidectomy (TT). This study was designed to investigate the effect of preoperative vitamin.D (Vit.D) status on the occurrence of post-total thyroidectomy hypocalcemia. Patients who underwent TT without parathyroidectomy were divided into three groups based on their preoperative Serum Vit.D levels (<20 ng/ml, 20-30 ng/ml, and ≥30 ng/ml were considered deficient, insufficient, and normal Vit.D levels, respectively). Serum levels of calcium and phosphorus were measured before and 24 hours after surgery in all patients. The patients were examined for clinical symptoms and signs of hypocalcemia postoperatively. In cases with positive clinical symptoms and signs of hypocalcemia and/or calcium levels <8 mg/dl, PTH level was measured before starting calcium infusion, while serum calcium and phosphorus levels were also measured 24 hours later. Among 100 patients enrolled in this study, 81% were females. The mean age was 36.60±8.32 years. Before surgery, the mean Vit.D level was 26.9±16.89 ng/ml, while 47% of cases had normal Vit.D level, 32% had insufficient vitamin levels, and 21% had Vit.D deficiency. Twenty-four hours after surgery, the calcium (P=0.356) and phosphorus (P=0.743) levels were not significantly different between the three Vit.D groups. A comparison of postoperative PTH levels between the three Vit.D groups showed no significant difference (P=0.596). Based on our findings, preoperative serum Vit.D levels did not affect postoperative serum calcium levels.

Decreased level of pre-operative vitamin D in a patient who is undergoing a total thyroidectomy is an early indicator of post-operative hypocalcemia.

Objective: To investigate the viability of utilizing preoperative serum vitamin D levels as a predictor of postoperative transient hypocalcemia in patients who were undergoing total thyroidectomy in our population. Study Design: Prospective Observational study. Setting: Shifa International Hospital Islamabad, Pakistan. Period: 1st July 2020 to 30th June 2022. Material &amp; Methods: All the data was collected prospectively. Patients are divided into two groups depending on the pre- operative vitamin D levels. The preoperative vitamin D levels are checked on day of admission before the surgery. After the surgery, their post-operative serum calcium levels are checked at 6 hours, 24 hours and 48 hours. Intact PTH levels are also checked after the surgery and correlation of transient hypocalcemia with intact PTH levels is also checked. Results: Our results strongly predict that serum Vitamin D levels and intact parathyroid hormone (PTH) levels are diagnostic indicators of transient hypocalcemia in post thyroidectomy patients. Conclusion: Our study shows: Pre-operative vitamin D is an early indicator of hypocalcemia in post-thyroidectomy patients. Serum intact parathyroid hormone levels is an early indicator of hypocalcemia in post-thyroidectomy patients.

Factors influencing serum calcium levels and the incidence of hypocalcemia after parathyroidectomy in primary hyperparathyroidism patients.

Parathyroidectomy (PTX) is an effective treatment for primary hyperparathyroidism (PHPT) patients. Postoperative hypocalcemia is a common complication after PTX. This study aimed to analyze the factors influencing serum calcium levels and the incidence of hypocalcemia after parathyroidectomy in primary hyperparathyroidism patients. The retrospective study included 270 PHPT patients treated with PTX and collected their demographic and clinical information and their laboratory indices. Factors influencing serum calcium levels and hypocalcemia after PTX in PHPT patients were analyzed using univariate and multifactorial analyses. First, in patients with normal preoperative serum calcium levels (2.20-2.74 mmol/L), the higher the preoperative alkaline phosphatase and serum phosphorus levels, the lower the postoperative serum calcium levels. Furthermore, the higher the preoperative serum calcium levels and the accompanying clinical symptoms, the higher the postoperative serum calcium levels. Low preoperative serum calcium levels were shown to be a risk factor for postoperative hypocalcemia (OR=0.022), and the optimal preoperative serum calcium threshold was 2.625 mmol/L (sensitivity and specificity were 0.587 and 0.712, respectively). Second, in the mild preoperative hypercalcemia group (2.75-3.00 mmol/L), the older the patient, the higher the preoperative and postoperative serum calcium levels, the higher the postoperative serum calcium; the lower the alkaline phosphatase and calcitonin levels, the higher the postoperative serum calcium levels. On the other hand, the younger the patient was, the more likely hypocalcemia blood was (OR=0.947), with an optimal age threshold of 47.5 years (sensitivity and specificity were 0.543 and 0.754, respectively). Third, in the preoperative moderate to severe hypercalcemia group (>3.0mmol/L), patients undergoing a combined contralateral thyroidectomy and a total thyroidectomy had low postoperative serum calcium levels. Patients with different preoperative serum calcium levels had various factors influencing their postoperative serum calcium levels and postoperative hypocalcemia, which facilitated the assessment of their prognosis.

A comparative study between the outcome of using LigaSure® versus suture ligation in thyroid surgery

Abstract Background: Thyroid surgery is one of the most performed operations; with the high vascularity of the thyroid gland and the importance of hemostasis to the surgical outcome, many surgeons have begun to use energy-based devices to perform thyroid surgical procedures, and numerous studies demonstrated the benefit of these devices. The aim was to compare the use of a vessel sealing device (LigaSure) with suture ligation in perioperative time, hypocalcemia, recurrent laryngeal nerve (RLN) damage, blood loss after surgery, hematoma formation, and period of the patient. Materials and Methods: In this study, 81 patients who underwent total thyroidectomy for different diseases, and divided into two groups corresponding to the hemostasis type: vessel sealing devices (LigaSure) group, and suture ligation group, these groups compared regarding operative time; hypocalcemia, RLN injury, blood loss after surgical procedure, hematoma formation, and period of hospital admissions. Results: The duration of surgery was more significant and shorter in the LigaSure® group 66.57 ± 8.93 min than suture ligation group 86.84 ± 17.5 min with P = 0.0001, with bleeding after surgery, was lesser in LigaSure® patients 52.76 ± 22.8 mL than suture ligation group 95.09 ± 39.91 mL with P = 0.0001; other outcomes (postoperative hematoma formation, injury to recurrent laryngeal nerve, hypocalcemia after surgery, and period of hospital admission), and there was no difference between the two groups mentioned above. Conclusion: The role of the LigaSure instrument in thyroidectomy surgery is to decrease the operative time duration and blood loss after surgery, with no effect on the incidence of recurrent laryngeal nerve damage, postoperative low serum calcium level, and hematoma formation.

Effect of Microdissection of Inferior Thyroid Artery on Post-operative Hypocalcemia in Total Thyroidectomy.

Hypocalcemia is one of the most common complication after bilateral thyroid surgery. Reported rates range from 5 to 35% and 0.5 to 4.4% for transient and permanent hypocalcemia respectively. Various methods have been devised to reduce the post-operative hypocalcemia and range from modification of surgical techniques to use of loops and avoidance of inadverant neck dissections. We conducted a randomised control trial of 50 patients divided into two groups, to evaluate the effect of microdissection and ligation of distal branches of inferior thyroid artery (group B) on incidence of temporary and permanent hypocalcaemia in patients of total thyroidectomy versus its ligation distally close to the thyroid capsule(group A). Postoperative mean total serum calcium levels were lower in group A as compared to group B (9.13mg/dl vs. 9.33mg/dl at 24h; 8.77 vs. 9.10 at 3rd day and 8.58 vs. 8.96mg/dl on 10 th day) with p > 0.05. The value of ionized serum calcium as recorded on 3rd day was 4.39mg/dl for group A and 4.72mg/dl for group B with p value ≤ 0.001 (Table 2). 19 patients in group A required calcium supplementation for 6months with incidence of transient hypocalcemia at 76% while 11 patients in group B had calcium supplementation for 6months with incidence of 40% and difference was significant statistically. Microdissection technique is better for preventing the temporary hypocalcemia and hence decreasing the hospital visits of the patient when compared to the ligation of inferior thyroid artery distally close to the thyroid gland. The incidence of permanent hypocalcemia doesn't varies significantly between both techniques.

Evaluation of the Consequences of Targeted or Focused Mini-Incision Parathyroidectomy in Patients With Primary Hyperparathyroidism

Surgical approaches to primary hyperparathyroidism (PHPT) have been associated with a change from invasive to non-invasive methods in the last 20 years. In this cross-sectional descriptive study, 55 patients with primary adenoma-induced HPT underwent surgery. The parathyroid gland in patients with primary hyperparathyroidism caused by parathyroid adenoma was removed by open surgery with an incision of about 2 cm in the neck in a targeted manner in a site localized by ultrasound or Sestamibi scan. The patients' personal information, including age, sex, length of hospital stay, serum calcium and parathyroid hormone (PTH) levels, success rate, and problems and unwanted adverse consequences of surgery (e.g. infection and bleeding) were recorded for each patient and collected information was analyzed in SPSS software. Most patients were women (80%) and individuals in the age range of 41-60 years (47.3%). The hospital stay length ranged from 2 to 5 days with an average of 3.25±0.9 days. Success was considered as a decrease in PTH and calcium levels during the first 24 h after the intervention, and success rates of 100, 98.2, and 69.1%, respectively, were evaluated for a reduction of at least 50% in PTH levels and less than 40 ng/ml of PTH levels. No major complications were reported in the studied patients. Wilcoxon test revealed significant decreases in patients' postoperative serum calcium and PTH levels (P=0.000). Mini-incision Parathyroidectomy with limited incision was associated with significant reductions in serum calcium and PTD without complications.

Comparison of frequency of Hypoparathyroidism in Total Thyroidectomy (TT) versus Near-Total Thyroidectomy (NTT) patients

BACKGROUND &amp; OBJECTIVE: Hypoparathyroidism in total thyroidectomy and near-total thyroidectomy is debatable. This study will determine the procedure of choice. Our objective is to compare the frequency of hypoparathyroidism in total thyroidectomy versus near-total thyroidectomy patients.&#x0D; METHODOLOGY: Prospective observational study was conducted at the Department of Surgery, Allied Hospital, Faisalabad. The study duration was six months. A total of 140 patients having multinodular goiter, 30-70 years of age, were selected. Patients were divided into two groups. In group A; patients underwent total thyroidectomy while in group B; patients were offered near-total thyroidectomy. All the parathyroid glands were preserved. In all patients, serum calcium levels and parathyroid hormone (PTH) levels were checked on 1st &amp; the 2nd day after surgery.&#x0D; RESULTS: Mean age in group A was 48.06±8.21 years &amp; in group B was 48.83 ± 7.0 years. The majority of patients, 88 (62.86%) were between 30 to 50 years of age. Out of these 140 patients, 37 (26.43%) were males &amp; 103 (73.57%) were females, with the ratio of 1:2.8. Mean pre-operative serum Parathyroid hormone was 25.67±9.87 pg/mL. The mean postoperative serum Parathyroid hormone was 16.87±2.43 pg/mL. Mean pre-operative serum calcium levels were 11.32 ± 4.52 mg/dl and mean postoperative serum calcium levels were 9.4 ±0.45mg/dl. In this study, the frequency of Hypoparathyroidism in the total thyroidectomy group (28.57%) was significantly higher than near-total thyroidectomy (8.57%) (p=0.002).&#x0D; CONCLUSION: Hypoparathyroidism is more common after total thyroidectomy as compared to near-total thyroidectomy.

Early Hypocalcemia after Sub-Total, Near-Total and Total Thyroidectomy: its Diagnosis and Treatment Options

Introduction: Hypocalcemia after thyroid surgery is most important and early complication1. The main aim of this study is to diagnose early hypocalcemia after thyroid surgery and its treatment options Method: 100 patients fulfilling inclusion criteria from December 2018 to February 2021 were included in this study who had undergone thyroid surgery (sub-total, near-total and total). Serum calcium less than 8.1 mg/dl, measured after 24 hours to 48 hours of surgery is taken as hypocalcemia. Following variables are assessed in this study, gender, age, pre-operative serum calcium levels and type of surgery. Hypocalcemia diagnosed by post-operative serum calcium levels, presence of numbness, Chvostek’s sign or Trousseau’s sign noted and analyzed by SPSS v20 was used for statistical analysis. p-value less than 0.05 was considered as statistically significant. Results: Early post-hypocalcemia developed in 71 (71%) patients of them 13(18%) were males and 58 (82%) were females and female gender is significantly more associated with hypocalcemia (p=0.001) Type of surgery (sub-total, near-total and total) is not related to development of early hypocalcemia (p=0.169). Patients who developed early hypocalcemia divided into two groups- A and B respectively. Group A is treated with oral calcium alone and B with oral calcium combined with Vitamin D3. The patients followed up for 6 months. The patients who treated with oral calcium and vitamin D3 combined responded well as compares with oral calcium alone (p=.001). Conclusion: This study suggests that female gender is associated with early hypocalcemia however there is no significant different type of surgery and patients who treated with oral calcium combined with vitamin D3 responded well as compared with oral calcium alone. Keywords: Early Hypocalcemia, thyroid surgery, Goiter

Effect of calcium supplementation on severe hypocalcemia in patients with secondary hyperparathyroidism after total parathyroidectomy.

BACKGROUNDSevere hypocalcemia (SH) is a dreaded complication of total parathyroidectomy (TPTX) without auto-transplantation.AIMTo compare conventional and preventive calcium supplementation (CS) regimens in terms of SH occurrence after TPTX.METHODSThis retrospective study included patients who underwent TPTX between January 2015 and May 2018 at the China-Japan Friendship Hospital. From January 2015 to May 2016, conventional CS was performed in patients who underwent TPTX, with calcium amounts adjusted according to postoperative serum calcium levels. From October 2016 to May 2018, preventive CS was performed according to preoperative alkaline phosphatase (ALP) levels. The patients were defined as low-risk (ALP < 500 U/L) and high-risk (ALP > 500 U/L) for SH. All preoperative blood samples were collected in the fasting state on the day before surgery. Postoperative blood samples were obtained at 6-7 AM from the first postoperative day.RESULTSA total of 271 patients were included. These patients were 47.7 ± 11.1 years old, and 57.6% were male. Their mean body mass index (BMI) was 22.9 ± 3.8 kg/m2. There were no significant differences in sex, age, BMI, preoperative ALP, serum calcium, serum phosphorus, calcium-phosphorus ratio, and intact parathyroid hormone (iPTH) between the two CS groups. Compared with conventional CS, preventive CS led to lower occurrence rates of hypocalcemia within 48 h (46.0% vs 74.5%, P < 0.001) and SH (31.7% vs 64.1%, P < 0.001). Multivariable analysis showed that preoperative iPTH levels [odds ratio (OR) = 1.001, 95% confidence interval (CI): 1.000-1.001, P = 0.009), preoperative ALP amounts (OR = 1.002, 95%CI: 1.001-1.003, P = 0.002), preoperative serum phosphorus levels (OR = 8.729, 95%CI: 1.518-50.216, P = 0.015) and preventive CS (OR = 0.132, 95%CI: 0.067-0.261, P < 0.001) were independently associated with SH. In patients with preoperative ALP ≥ 500 U/L, only preventive CS (OR = 0.147, 95%CI: 0.038-0.562. P = 0.005) was independently associated with SH.CONCLUSIONThis study suggests that preventive CS could reduce the occurrence of SH, indicating its critical value for hypocalcemia after TPTX.

Pre and Postoperative Serum Parathyroid Hormone, Calcium and Magnesium Levels in Thyroidectomy Patients in Tertiary Care Hospital of Southern India: A Prospective Observational Study

Introduction: Thyroidectomy has been established as the preferred operation for various thyroid disorders in various forms, ranging from hemithyroidectomy, subtotal to total thyroidectomy. Postoperative hypocalcaemia is one of the most common complications that is observed in patients who undergo total thyroidectomy. To minimise the postoperative complications and to minimise hospital stay and early discharge, it is important to predict patients at risk of developing hypocalcaemia. Measurements of Parathyroid Hormone (PTH) in the immediate postoperative period along with serum calcium are useful and reliable methods. Aim: To determine the risk of post total thyroidectomy by measuring PTH level after total thyroidectomy and compare serum calcium and magnesium levels pre and two hours post total thyroidectomy. Materials and Methods: A prospective observational study was conducted on 34 patients, who underwent total thyroidectomy, from October 2018- May 2020. Preoperative calcium, magnesium and PTH were compared with postoperative calcium, magnesium and PTH. All data were analysed using Statistical Package for the Social Sciences (SPSS) for Windows, Version 22.0. Paired t-test was used to compare and find an association. results: Present study included six males (17.6%) and 28 females (82.4%), there was statistically significant difference between postoperative calcium levels in total thyroidectomy without central neck dissection (mean of 8.36) and postoperative calcium levels in total thyroidectomy with neck dissection (mean of 7.67). There was a significant statistical association between postoperative calcium and postoperative PTH levels (p&lt;0.001). Present study observed significant positive correlation coefficient (r=0.698) and a high level of significance (p&lt;0.001) for postoperative calcium and postoperative PTH. Present study showed no definitive correlation between postoperative serum magnesium and calcium levels. conclusion: For predicting the risk of hypocalcaemia after thyroidectomy it is more reliable to measure the serum PTH level before and after operation and compare the reduction level of percentage of PTH drop for predicting the risk of hypocalcaemia.

Hypocalcemia in patients undergoing bilateral thyroid surgery: A clinical study

Background: Hypocalcemia after thyroid surgery is a common complication that can cause severe short- and long-term morbidity. The goal of this study was to see how often post-thyroidectomy hypocalcaemia (defined as a corrected calcium of less than 2.1 mmol/l) was and what factors could predict it in a tertiary surgical center.Aims: The aim of present study was to assess the incidence of post thyroidectomy hypocalcemia and factors which might play a role in its occurrence.Materials and Methods: The present prospective study was conducted in department of general surgery in 40 patients who had their thyroids removed bilaterally were studied. The research was conducted from March 2017 to February 2019. Serum calcium estimation was used to determine the incidence of hypocalcemia in the immediate post-operative period, 4 hours, and 24 hours following surgery, and on the 5th post-operative day. Pre-operative and post-operative serum calcium levels, clinical manifestations, and disease type all patients were examined.Results: Mean age of the patients was 48.2±14.90 years with a range of 21-70 years. Maximum number of patients had colloid goitre on FNAC i.e., 18 (45%) followed by atypical cells s/o malignancy in 9 (22.5%) patients. In 32 (80%) patients, total thyroidectomy was performed and in 8 (20 %) patients subtotal thyroidectomy was performed. Mean serum calcium preoperatively was 9.0±0.2 and when it was compared with serum calcium level in immediate postoperative, 4 hours after surgery, 24 hours after surgery and 5 days after surgery, it showed a significant difference (p

Predictive markers for severe hypocalcemia in dialysis patients with secondary hyperparathyroidism after near-total parathyroidectomy.

Secondary hyperparathyroidism (SHPT) is common in dialysis patients with end-stage renal disease (ESRD). Parathyroidectomy (PTX) is an effective treatment for SHPT. Postoperative severe hypocalcemia (SH) is a common and severe complication after PTX. This study aimed to investigate the potential predictive markers of SH in dialysis ESRD patients with SHPT after near-total PTX (near-tPTX) without autotransplantation (AT). A retrospective analysis involving 131 dialysis patients with SHPT who were treated with near-tPTX without AT between January and August 2018 was performed. Demographic characteristics (age, gender, type of dialysis modality, etc.) and perioperative laboratory parameters [serum calcium, phosphorus, alkaline phosphatase (ALP), intact parathyroid hormone (iPTH), and bone metabolism markers] were collected and analyzed. Postoperative serum calcium level <1.875 mmol/L (7.5 mg/dL) was defined as postoperative SH. Among the 131 patients, 73 (55.7%) had postoperative hypocalcemia and 43 (32.8%) had postoperative SH. Univariate analysis showed that values of preoperative serum iPTH, calcium, ALP, bone-specific alkaline phosphatase (BAP), and osteocalcin (OC) were significantly different between the SH and non-SH groups. In the multivariate logistic regression model, preoperative serum ALP was an independent risk predictor of postoperative SH. The receiver operating characteristic (ROC) curve for preoperative serum ALP was 277 U/L. The sensitivity of preoperative serum ALP was 73.8% and the specificity was 63.2%. The incidence rates of postoperative hypocalcemia and SH in dialysis patients with SHPT after near-tPTX without AT were 55.7% and 32.8%, respectively. Preoperative serum ALP was an independent predictor for the occurrence of postoperative SH, and dialysis patients with SHPT were susceptible to postoperative SH when preoperative serum ALP level was >277 U/L. Hence, we recommend that preoperative serum ALP be utilized to complement clinical protocols for postoperative SH management of dialysis ESRD patients with SHPT after near-tPTX without AT.

Preventing calcium and vitamin D deficiencies following weight loss and metabolic surgery

IntroductionUncertain nutritional outcomes following common metabolic surgical techniques are concerning given the long-term potential for postoperative metabolic bone disease. This study aims to investigate the variations in serum calcium, vitamin D, and parathyroid hormone (PTH) levels following Roux-en-Y Gastric bypass (RYBP) and Sleeve Gastrectomy (SG).MethodsA retrospective analysis of 370 patients who underwent metabolic surgery at a single-centre group practice in Melbourne, Australia, over 2 years.ResultsPatients underwent SG (n = 281) or RYGP (n = 89), with 75% and 87% of the cohort being female, respectively. Postoperative mean serum calcium levels and median serum vitamin D levels improved significantly by 24 months within both cohorts. Serum PTH levels within the RYBP group were significantly higher than the SG group across all time points. PTH levels significantly fell from 5.7 (IQR 4.2–7.4) to 5.00 (4.1–6.5) pmol/L by 24 months following SG. However, PTH levels following RYBP remained stable at 24 months, from 6.1 (IQR 4.7–8.7) to 6.4 (4.9–8.1) pmol/L. Furthermore, we failed to notice a significant improvement in PTH levels following RYBP among those with higher PTH levels preoperatively.ConclusionHigher PTH levels following RYBP, compared to SG, may imply we are undertreating patients who are inherently subjected to a greater degree of malabsorption and underlying nutritional deficiencies. This finding calls for a tailored supplementation protocol, particularly for those with high preoperative PTH levels undergoing RYBP, to prevent deficiencies.

In Situ Preservation of Parathyroid Gland With Vasculature for Papillary Thyroid Carcinoma Is Associated With Higher PTH Levels After Total Thyroidectomy.

To evaluate the impact of parathyroid gland vasculature preservation in-situ technique (PGVPIST) on postoperative parathyroid hormone (PTH) and calcium plasma levels in thyroid patients undergoing total thyroidectomy for papillary thyroid carcinoma (PTC). Retrospective cohort study. Patients with PTC who underwent total thyroidectomy by either the conventional technique (group 1, January 2019 to January 2020) or PGVPIST (group 2, January 2020 to January 2021) were compared. Postoperative blood calcium levels and PTH levels were assessed in these groups. Totally 149 patients with consecutive PTC underwent total thyroidectomy, including 60 patients in group 1 and 89 patients in group 2. Postoperative serum calcium levels in group 1 were insignificantly lower than in group 2 at day 1 (2.18 ± 0.02 vs 2.15 ± 0.01 mmol/L) and day 30 (2.27 ± 0.02 vs 2.38 ± 0.11) after surgery. But postoperative serum PTH levels in group 1 were significantly lower than that in group 2 at day 1 (23.68 ± 2.54 vs 31.46 ± 2.11 pg/mL) and day 30 (45.63 ± 3.21 vs 55.65 ± 2.89 pg/mL) after surgery. Parathyroid gland vasculature preservation in-situ technique for PTC is associated with higher PTH level after total thyroidectomy. The parathyroid gland vasculature mostly strongly adheres with adjacent thyroid parenchyma. Therefore, deferred processing of tiny thyroid parenchyma of parathyroid gland vessels is essential to prevent devascularization.