Recovery of parathyroid function after total thyroidectomy: long-term follow-up study

BACKGROUND: To prevent postoperative hypoparathyroidism following total thyroidectomy, the parathyroid glands are preserved in situ and/or resected or devascularized parathyroid glands are autotransplanted. A retrospective investigation was conducted utilizing biochemical and specific endocrine assessments to evaluate the difference in recovery of parathyroid function in the long term. METHODS: A total of 103 patients underwent total thyroidectomy at Second Department of Surgery, School of Medicine, Kagawa University between 1990 and 1998. These patients were divided into a preservation group (n = 17), with only preserved glands in situ; a combination group (n = 72), consisting of patients with one or more parathyroid glands preserved in situ and one or more autotransplanted parathyroid glands; and an autotransplantation group (n = 14), with only transplanted glands. RESULTS: The overall incidence of permanent hypoparathyroidism in the preservation group, the combination group, and the autotransplantation group was 0%, 1.4%, and 21.4%, respectively. The mean levels of intact parathyroid hormone in the preservation group, the combination group, and the autotransplantation group recovered to 102%, 107%, and 50% of the preoperative levels at 5-year follow up. CONCLUSION: The results of the present study suggest that parathyroid glands should be preserved in situ whenever possible, to promote better recovery of postoperative function, and that only autotransplantation produces inadequate recovery of long-term function.     

Hypoparathyroidism following total thyroidectomy: prognostic value of intraoperative parathyroid hormone assay

Transient and definitive hypoparathyroidism represent a frequent complication after thyroid surgery. Recently some authors proposed the use of intraoperative parathyroid hormone assay for the rapid detection of this complication. In this paper the authors describe the data obtained from 42 total thyroidectomies with intraoperative measurements of parathyroid hormone. When parathormone decrement was over 75% during thyroidectomy, the hypocalcemic symptomatology was found in all cases during postoperative observation. The authors emphasize intraoperative PTH dosage for immediate identification of patients at risk for postoperative hypoparathyroidism. In this cases parathyroid autotransplantation is suggested to prevent postoperative hypoparathyroidism.     

Autotransplantation of at least one parathyroid gland during thyroidectomy in benign thyroid disease minimizes the risk of permanent hypoparathyroidism

OBJECTIVE:Permanent hypoparathyroidism is a distressing complication of thyroid surgery. The reported incidence varies between 0.4 and 13.8 % and is directly correlated to the extent of thyroidectomy. The aim of this retrospective study was to analyze whether simultaneous autotransplantation of at least one parathyroid gland during total thyroidectomy for benign thyroid disease could reduce the risk of permanent hypoparathyroidism. METHODS: Since 01/1999 all thyroid operations are prospectively recorded. Beside daily postoperative measurement of serum calcium level, iPTH is routinely determined on the third post op day. Patients with complications are followed closely. Postoperative hypoparathyroidism persisting for more than 6 months is defined permanent. RESULTS: Between 01/1999 and 02/2001 146 total thyroidectomies for benign thyroid disease have been performed (81 pat. with Graves disease, 62 with nodular goiter, 3 with thyroiditis de Quervain/Hashimoto). In 37 pat. (25 %) at least one parathyroid gland was simultaneously autotransplanted into the ipsilateral sternocleidomastoid muscle. Group I (no parathyroid autotransplantation, n = 109) and group II (parathyroid autotransplantation, n = 37) were comparable concerning patient age, thyroid disease and lowest post op calcium level (2.07 versus 2.05 mmol/l). The incidence of postoperative symptomatic hypocalcemia (14.7 % versus 21.6 %) and temporary hypoparathyroidism (15.6 % versus 18.9 %) was higher in group II patients (n. s.). Conversely, permanent hypoparathyroidism occurred exclusively in group I patients (2.75 %), patients with parathyroid autotransplantation (group II) did not develop this complication. CONCLUSIONS: Simultaneous autotransplantation of at least one parathyroid gland during total thyroidectomy for benign thyroid disease seems to minimize the risk of permanent hypoparathyroidism. The potential of routine autotransplantation in this setting has to be evaluated. The incidence of postoperative temporary hypocalcemia may be elevated with this policy.     

Potential role for intraoperative gamma probe identification of normal parathyroid glands

BACKGROUND: Patients undergoing central neck surgery are at risk for hypoparathyroidism. We hypothesized that gamma probe identification of sestamibi-labeled parathyroid glands might help maximize parathyroid preservation. METHODS: Records of 351 patients who underwent central neck surgery were reviewed. A subgroup of patients underwent sestamibi injection followed by gamma probe-directed parathyroid gland identification. RESULTS: Operation was performed for malignancy in 73% of patients and represented a reoperation in 34%. Persistent hypoparathyroidism was more common in patients who underwent reoperation versus a primary operation (6.8% versus 1.7%; P = 0.02). Thirteen patients underwent gamma probe-directed identification of sestamibi-labeled parathyroid glands; in 6 of these patients, sestamibi-labeled parathyroid glands were salvaged from the resected specimens and autografted. None of these 13 patients developed persistent hypoparathyroidism. CONCLUSIONS: Patients undergoing reoperative central neck surgery are at increased risk for postoperative hypoparathyroidism. Gamma probe-directed salvage of sestamibi-labeled parathyroid glands may help maximize parathyroid preservation, especially in complex or reoperative central neck surgery.     

Hypoparathyroidism after total thyroidectomy

The aim of the study is to describe the last advances (2000-2007) in the management of hypoparathyroidism secondary to total thyroidectomies. This systematic review was conducted according to recently presented guidelines on the argument. A comprehensive literature search was performed in August 2007 consulting PubMed MEDLINE for publications, matching the terms of hypoparathyroidism/ hypocalcaemia AND parathyroid glands, total thyroidectomy, thyroid surgery, postoperative complications, and risk factors. Hypoparathyroidism remains a frequent and challenging complication following total thyroidectomy. A meticulous surgical technique with an excellent anatomical knowledge of the neck compartment are mandatory to restrain its appearance. The application of lens magnification and of parathyroid glands autotransplantation (PTAT) during thyroid surgery contribute to preventing definitive hypoparathyroidism and also to decrease the postoperative incidence of transient hypocalcaemia. Consequently, the reduction of complications rate determines the decrease of the hospitalization length, costs, and patient discomfort due to a fear of clinical manifestations, and facilitates the return to work. The microsurgical approach and the PTAT are effective and easily learnable procedures, also adaptable in less favoured areas without additional cost. We believe that these performances represent a real aid in association with an operative strategy aiming always to the preservation of parathyroid glands in situ.     

Dysfunction of calcium metabolism following resection of the thyroid gland. An analysis of important risk factors

PURPOSE: Dysfunction of the parathyroid glands is a typical complication following thyroid surgery. Risk factors for the development of postoperative symptomatic hypocalcemia were retrospectively analyzed. METHODS: 308 consecutive thyroid resections (women n = 236, men n = 72, mean age 53 years) performed in 1996 and 1997 were evaluated. Main diagnosis was non-toxic nodular goiter (n = 234, 76 %), 28 patients (9 %) had thyroid carcinoma. The most common operation performed was bilateral functional thyroid resection (n = 116, 38 %), the proportion of thyroidectomies was 14 % (n = 44). The patients with postoperative symptomatic hypocalcemia were followed for a median of 32 months. RESULTS: Clinical symptoms of hypocalcemia were observed in 18 patients (6 %) postoperatively. Three patients developed transient (n = 1) or permanent hypothyroidism (n = 2). In univariate analysis, the underlying thyroid disease, the method of operative therapy, removal, identification and autotransplantation of parathyroid glands, in multivariate analysis, thyroidectomy (relative risk 6.9) and removal of parathyroid glands (relative risk 23.9) were proved to be significant risk factors for the development of postoperative symptomatic hypocalcemia (p < 0.05). CONCLUSIONS: Patients with thyroidectomy, operation for thyroid carcinoma and intraoperative removal of parathyroid glands should be closely followed for postoperative hypocalcemia. Exact surgical technique provided, permanent hypoparathyroidism is rare, particularly if several parathyroid glands were identified intraoperatively and autotransplanted, if necessary.     

甲状腺癌根治术致甲状旁腺功能减退的危险因素及预防

目的:探讨甲状腺癌根治术中可能导致甲状旁腺功能减退的危险因素及预防措施。方法:回顾性分析首都医科大学附属北京同仁医院普通外科2014年全年由同一外科医师实施的75例甲状腺癌手术的临床资料。结果:全组术后发生甲状旁腺功能减退20例(26.67%),其中暂时性甲状旁腺功能减退19例(25.33%),永久性甲状旁腺功能减退1例(1.33%)。甲状腺全切术患者甲状旁腺功能减退发生率明显高于甲状腺近全切除术患者(46.88%vs.11.63%,P0.05);行VI区淋巴结清扫患者甲状旁腺功能减退发生率明显高于未行VI区淋巴结清扫患者(45.71%vs.10.00%,P0.05);同时行自体甲状旁腺移植术患者甲状旁腺功能减退发生率高于未行甲状旁腺移植患者,但差异无统计学意义(50.00%vs.22.22%,P0.05)。结论:甲状腺全切和Ⅵ区淋巴结清扫是导致甲状旁腺功能减退的危险因素。术中精细解剖甲状腺后被膜,尤其是尽可能保留下甲状旁腺血运,术后应用预防性药物可能有助于甲状旁腺功能的保护。     

甲状旁腺的术中观察及术后甲状旁腺功能减退的探讨

目的在甲状腺手术中认识甲状旁腺的局部解剖及甲状腺手术切除范围和甲状旁腺功能减退的关系,探讨术后甲状旁腺功能减退的原因及预防治疗措施。方法回顾2582例甲状腺手术患者的临床资料并术后随访。结果其中对721例双侧甲状腺侧叶全切者行术中探察,发现甲状腺病理状态下甲状旁腺的局部解剖位置及数量变异大,探察到的每种情况术后暂时性甲状旁腺功能减退发生率各不相同,其中上下甲状旁腺双侧均不明显组永久性甲状旁腺功能减退发生1例。2453例手术中行甲状腺部分切除、单侧叶次全切除、单侧叶全切除、双侧叶全切除、双侧叶全切及颈淋巴结清扫者（即甲状腺癌根治）暂时性甲状旁腺功能减退发生率依次增高,其中以双侧叶次全切除暂时性甲状旁腺功能减退发生率最高。且又因甲状腺疾病病种各不相同,甲状旁腺功能减退发生率亦各不相同。结论术后甲状旁腺功能减退的发生与手术操作、甲状旁腺的局部解剖及其变异、甲状腺手术切除范围、巨大甲状腺及其内巨大包块对双侧甲状腺后被膜深面组织的压迫,甲状腺疾病病种不同而手术难度各异等皆有关系。     

Selective parathyroid auto‐transplantation during thyroidectomy

Aim: Permanent hypoparathyroidism is a debilitating morbidity following thyroidectomy and parathyroid auto‐transplantation has been shown to be effective in preventing permanent hypoparathyroidism. Controversy exists regarding the benefit of routine versus selective auto‐transplantation. We evaluate the outcome of selective parathyroid auto‐transplantation in our hospital. Methods: A retrospective study was conducted to assess the incidence of postoperative hypocalcaemia. Indication for parathyroid auto‐transplant was doubtful viability of parathyroid gland during thyroidectomy. From 1 July 2000 to 30 June 2005, all patients who underwent total, subtotal and completion thyroidectomy were included. Other outcome measures including recurrent laryngeal nerve injury and operative time were also analyzed. Results: A total of 170 bilateral or completion thyroidectomies were performed within this period. Total, subtotal, and completion total thyroidectomies were performed in 103 (60.6%), 62 (36.5%), and five (2.9%) patients, respectively. Median age was 45 years (range 19–82). One hundred and twenty‐four patients (73%) had benign thyroid disease, and 46 patients (27%) had thyroid carcinoma. Parathyroid auto‐transplant was performed in 35 patients (20.6%). Mean operation time was 204 min (range 95–510 min). There was no difference in the operation time between the patients with parathyroid auto‐transplant and those without auto‐transplant (217 vs 200 min, P = 0.229). Transient hypocalcaemia occurred in 31 patients (18.2%) whereas two patients had permanent hypocalcaemia (1.2%). Permanent recurrent laryngeal nerve injury occurred in one patient (0.6%). Conclusions: The adoption of selective parathyroid auto‐transplant during thyroidectomy achieves an extremely low incidence of permanent hypoparathyroidism without excessive transient hypoparathyroidism.     

甲状腺切除手术中暴露并保护甲状旁腺的必要性

【摘要】 目的 探讨甲状腺切除手术中暴露并保护甲状旁腺的必要性。方法 将164例因结节性甲状腺肿和甲状腺癌接受手术治疗的患者根据已完成手术情况分为甲状旁腺暴露组和非暴露组两组。非暴露组76例患者保留甲状腺后被膜,未寻找甲状旁腺;暴露组88例患者寻找并保护甲状旁腺,尽量保证甲状旁腺的血供及完整性。术后进行动态监测血清钙变化,观察甲状旁腺的功能情况。结果 在术中寻找并保护甲状旁腺的观察组中,术后甲状旁腺功能低下的发生率较未寻找甲状旁腺的对照组患者明显降低,两组比较差异有统计学意义(P<0.05)。结论 在甲状腺切除手术中,寻找并保护甲状旁腺,可以有效的降低术后甲状旁腺功能低下的发生率。     

达芬奇机器人甲状腺手术中甲状旁腺的损伤因素及保护

目的分析达芬奇机器人甲状腺手术中甲状旁腺损伤的相关因素,探讨甲状旁腺保护的方法,避免永久性甲状旁腺功能减退的发生。 方法回顾性分析2014年1月至2016年5月在济南军区总医院甲状腺乳腺外科行达芬奇机器人甲状腺手术的190例患者的临床资料,统计术后患者出现低甲状旁腺激素(PTH)及低血钙的发生率,分析术后发生甲状旁腺功能减退的相关因素,探讨术中如何保护甲状旁腺及其功能。 结果患者术后暂时性低PTH的发生率为20.53%(39/190),暂时性低血钙的发生率为23.68%(45/190),术后随访无永久性甲状旁腺功能减退发生。甲状腺全切术后低PTH、低血钙的发生率高于腺叶 ＋ 峡部切除术者(χ²＝14.789,11.604;P＝0.000,0.001)。行中央区淋巴结清扫的患者术后低PTH、低血钙的发生率高于未清扫者(χ²＝11.200,17.771;P＝0.001,0.000)。甲状旁腺原位保留者术后低PTH、低血钙的发生率低于切除后自体移植者(χ²＝5.536,4.851,6.140,5.453;P＝0.019,0.028,0.013,0.020)。 结论在达芬奇机器人甲状腺手术中,甲状腺全切除、中央区淋巴结清扫、甲状旁腺切除后自体移植是造成患者术后暂时性甲状旁腺功能减退的重要影响因素。在达芬奇机器人手术系统下,准确识别甲状旁腺,精细化手术操作,原位保护甲状旁腺及血供,是预防永久性甲状旁腺功能减退的有效方法。     

纳米炭负显影及甲状旁腺自体移植在甲状腺乳头状癌手术中的应用

目的探讨纳米炭混悬注射液负显影联合甲状旁腺自体移植对甲状旁腺保护的临床意义。 方法回顾性分析2014年5月至2017年05月收治的134例甲状腺乳头状癌(TPC)患者临床资料,将67例注射纳米炭混悬注射液行甲状旁腺负显影及自体移植患者作为纳米炭组,67例常规手术患者作为对照组。应用SPSS17.0进行统计学处理,比较两组患者术后甲状旁腺误切率,手术后暂时性及永久性甲状旁腺功能减退的发生率,采用χ²检验,P<0.05差异有统计学意义。 结果纳米炭组甲状旁腺误切率10.44%(7/67)、暂时性甲状旁腺功能减退发生率10.44%(7/67)、永久性甲状旁腺功能减退发生率4.47%(3/67)明显低于对照组31.34%(21/67)、31.34%(21/67)、21.89%(14/67)差异有统计学意义(P<0.05)。 结论TPC根治术中通过纳米炭混悬注射液进行甲状旁腺负显影联合自体移植术,可有效减少甲状旁腺损伤,降低永久性甲状旁腺功能减退的发生率,提高手术安全性。     

Total thyroidectomy. The preferred option for multinodular goiter.

Total thyroidectomy is an operation that has generally been reserved for the management of differentiated thyroid carcinoma. Over the last decade total thyroidectomy has become used increasingly and is now the preferred option in the authors' unit for the management of multinodular goiter affecting the entire gland. Over the period from 1975 to 1985, 853 thyroidectomies have been performed for multinodular goiter; of these, 115 have been total thyroidectomies. During that time, the incidence of total thyroidectomy for multinodular goiter has increased in percentage terms from 9% in 1975 to 50% in 1985. There have been two cases of permanent hypoparathyroidism and one case of permanent recurrent laryngeal nerve injury, and these occurred in patients who had less than total thyroidectomy. Total thyroidectomy is an appropriate operation for the management of diffuse multinodular goiter where the entire gland is involved because it precludes patients from requiring further surgery for recurrent disease, with its high associated risks. It must be emphasized, however, that protection of the recurrent laryngeal nerve and parathyroid glands must still be paramount in dealing with benign thyroid disease.     

甲状腺手术中甲状旁腺误切的危险因素分析

目的探讨甲状腺手术中甲状旁腺误切的危险因素。方法回顾性分析2013年1月至2016年6月期间在四川大学华西医院甲状(旁)腺疾病外科诊疗中心因甲状腺良恶性结节至少行甲状腺全切除的983例患者的临床资料。依据术后病理学检查结果所示的切除标本是否存在整枚或大部分甲状旁腺,将患者分为误切组和非误切组。比较2组患者的临床资料数据,并采用单因素及多因素方法探索甲状旁腺误切的危险因素。结果983例甲状腺疾病患者中,发生甲状旁腺误切50例(误切组),未发生甲状旁腺误切933例(非误切组)。术后暂时性甲状旁腺功能低下发生率:误切组为66.0%(33/50),非误切组为36.2%(338/933),2组比较差异有统计学意义,误切组较高(χ~2=19.903,P<0.05);术后永久性甲状旁腺功能低下发生率:误切组为2.0%(1/50),非误切组为0.4%(4/933),2组比较差异无统计学意义(χ!2=2.315,P=0.128)。单因素分析结果表明,双侧中央区淋巴结清扫(P=0.004)和术中辨认甲状旁腺总数≤2枚(P=0.002)是甲状腺手术中甲状旁腺误切的危险因素;多因素分析结果表明,双侧中央区淋巴结清扫[OR=2.553,95%CI为(1.236,5.277),P=0.011]和术中辨认甲状旁腺总数≤2枚[OR=2.819,95%CI为(1.423,5.581),P=0.003]是甲状腺手术中甲状旁腺误切的独立危险因素。结论甲状腺手术应充分评估患者的获益与风险,合理施行双侧中央区淋巴结清扫。甲状腺手术医师应努力提高对甲状旁腺的辨认能力,从而降低手术中甲状旁腺误切的发生率。     

内镜甲状腺手术对甲状旁腺的辨别与保护研究

目的探讨在内镜甲状腺手术中辨别和保护甲状旁腺的方法。方法回顾性分析2006年10月至2010年7月160例行颈前小切口内镜辅助甲状腺手术患者的临床资料,其中甲状腺瘤58例,结节性甲状腺肿82例,原发性甲状腺功能亢进16例,甲状腺乳头状癌4例。行一侧甲状腺次全切除术90例,双侧甲状腺次全切除术46例,甲状腺全切术20例,甲状腺全切术＋中央组淋巴结清扫4例,术中均对甲状旁腺进行精确辨认及有效保护。结果 160例均成功完成手术,术后暂时性甲状旁腺功能减退4例（2.5%）,未出现永久性甲状旁腺功能减退。结论内镜辅助甲状腺手术在术中可通过内镜放大作用对甲状旁腺进行精确辨认,并在内镜视野下完成对甲状旁腺血供的精细解剖和分离,有效的保护了甲状旁腺及其血供,明显降低了术后甲状旁腺功能减退并发症的发生率。     

Limited versus radical parathyroidectomy in familial isolated primary hyperparathyroidism

BACKGROUND: Familial isolated primary hyperparathyroidism (FIHPT) is characterized by earlier onset, higher incidence of multiglandular disease, and higher recurrence rate when compared with sporadic primary hyperparathyroidism. Excision of 3.5 or 4 glands with autotransplantation has been recommended; however, these approaches lead to permanent hypoparathyroidism in 13% to 41% of patients. It is reported that many patients with FIHPT return to normocalcemia after single-gland excision. The use of preoperative localization and intraoperative parathyroid hormone assay permits limited resection of only hypersecreting glands. We report the outcome of this operative approach. METHODS: Fifteen consecutive patients with FIHPT underwent limited parathyroidectomy with resection guided by intact parathyroid hormone secretion in 2 university centers. Patients were followed up postoperatively for serum calcium and intact parathyroid hormone levels. RESULTS: With an operative success of 93%, 14 patients had only single-gland excision and 80% had unilateral neck exploration. All initial patients had their hypercalcemia corrected. In 4 reoperations, permanent hypoparathyroidism occurred in 2 patients. One recurrence was observed in 40 (8-122) months of follow-up. CONCLUSION: Limited parathyroidectomy allows successful single-gland excision in many patients with FIHPT, thus decreasing the risk of hypoparathyroidism. In these patients, a low incidence of hypoparathyroidism may be preferable to the possibility of late recurrence.     

Parathyroid autotransplantation with total thyroidectomy for thyroid carcinoma: long-term follow-up of grafted parathyroid function.

BACKGROUND: Permanent hypoparathyroidism is a major complication of thyroidectomy. Autotransplantation of parathyroid glands has been attempted to prevent this complication. However, no direct data have been available to assess grafted parathyroid function after long-term follow-up in terms of the serum intact parathyroid hormone (PTH) concentration. METHODS: Eighty-four consecutive patients with differentiated thyroid carcinoma who underwent total thyroidectomy and bilateral modified neck dissection from 1992 to 1996 were enrolled. They concomitantly underwent total parathyroidectomy and autotransplantation of all parathyroid glands to the pectoralis major muscle. The serum intact PTH concentration was periodically measured as an index of grafted parathyroid function. RESULTS: The mean follow-up was 34 months. In all autotransplanted patients serum intact PTH concentrations fell below detectable limits immediately after surgery. They were restored to the normal range within 1 month postoperatively and were maintained during observation in 80 (95%) of 84 patients. Seventy-eight of 80 patients with normal intact PTH values were normocalcemic without any treatment and the remainder were normocalcemic with 1 microgram of 1 alpha-vitamin D3. Four hypoparathyroid patients were normocalcemic with 2 micrograms of 1 alpha-vitamin D3. The postoperative average serum intact PTH concentration of patients having more than 2 autotransplanted parathyroid glands was almost equal to that of patients with preservation of the parathyroid glands in situ. The incidence of permanent hypoparathyroidism was inversely correlated with the number of autotransplanted parathyroid glands. CONCLUSIONS: The recovery patterns of the intact PTH concentration indicate that the glands were grafted successfully and functioned for a long period. This feasible method of parathyroid autotransplantation bears comparison with the previous reports in terms of the incidence of permanent postoperative hypoparathyroidism, and it can be performed simply and is reproducible.     

分化型甲状腺癌术后131I治疗对甲状旁腺辐射损伤作用

目的:探讨分化型甲状腺癌术后~(131)I治疗对甲状旁腺的直接辐射损伤作用及其对甲状旁腺功能的影响,以及~(131)I的治疗时机。方法:回顾性分析2013年1月―2015年2月在甲状腺外科第一次行~(131)I清甲治疗的281例甲状腺乳头状癌患者的临床资料。依据~(131)I治疗前甲状旁腺激素水平分为甲状旁腺功能正常者238例和甲状旁腺功能轻度低下者43例。检测并分析患者术后第1、6天与~(131)I治疗前、~(131)I治疗后1周、3个月的血清钙水平和血清甲状旁腺激素水平。结果:所有患者~(131)I治疗前均无低钙血症的临床表现。术后甲状旁腺功能正常患者不同时间点的血清钙水平整体差异有统计学意义(F=6.912,P0.05),术后第1天血清钙水平最低(P0.05),其余4次时间点间血清钙水平差异无统计学意义(P0.05);不同时间点甲状旁腺激素水平整体差异有统计学意义(F=16.808,P0.05),术后第1天水平最低,~(131)I治疗前升高,~(131)I治疗后1周再次下降,~(131)I治疗后3个月再次升高。术后甲状旁腺功能轻度低下患者~(131)I治疗后于平均术后第7.5天出现不同程度的低钙血症;不同时间点的血清钙水平整体差异有统计学意义(F=37.710,P0.05),术后第1天和~(131)I治疗1周后血清钙水平最低;不同时间甲状旁腺激素水平整体差异有统计学意义(F=29.082,P0.05),术后第1天水平最低,~(131)I治疗前升高,~(131)I治疗后1周再次下降,且接近术后第1天水平(P0.05),~(131)I治疗后3个月再次升高,且均值达到正常值范围。结论:~(131)I清甲治疗对甲状旁腺存在直接辐射损伤,可引起甲状旁腺功能减退,加重甲状旁腺功能低下。分化型甲状腺癌术后若合并甲状旁腺功能低下,建议等到甲状旁腺激素完全恢复正常后再行~(131)I清甲治疗。     

Parathyroid autotransplantation during thyroidectomy. Results of long-term follow-up.

SUMMARY BACKGROUND DATA: Permanent hypoparathyroidism is a recognized complication of thyroidectomy. Operative strategies to prevent this complication include preservation of parathyroid glands in situ and autotransplantation of parathyroid glands resected or devascularized during thyroidectomy. METHODS: An analysis of 194 patients having thyroidectomy and simultaneous parathyroid autotransplantation at Barnes Hospital from 1990 to 1994 was performed. Data were collected regarding patient demographics, indication for thyroidectomy, operative procedure, pathologic diagnoses, and postoperative course, including biochemical assessment of parathyroid autograft function. RESULTS: Of 194 patients having either total, subtotal, or completion thyroidectomy, 104 (54%) experienced a [Ca(+2)]nadir less than or equal to 8.0 mg/dL and had symptoms and signs of hypocalcemia. Parathyroid autotransplantation was successful in 103 (99%) of these 104 cases and resulted in a 1.0% incidence of hypoparathyroidism in this series. CONCLUSIONS: Although preservation of parathyroid glands in situ is desirable, routine parathyroid autotransplantation during thyroidectomy virtually eliminates postoperative hypoparathyroidism. Normal parathyroid glands resected or devascularized during thyroidectomy for well-differentiated thyroid carcinoma or benign disease should be transplanted in the sternocleidomastoid muscle. Patients with Multiple Endocrine Neoplasia type 2A should have parathyroid glands resected at the time of thyroidectomy for medullary thyroid carcinoma and transplanted in the nondominant forearm. Postoperative management in most patients after thyroidectomy and parathyroid autotransplantation involves temporary calcium and vitamin D replacement and close biochemical evaluation. This precautionary measure of parathyroid autotransplantation markedly reduces the incidence of permanent postoperative hypoparathyroidism.