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Folia Medica Apr 2023There are a number of thyroid gland diseases that require surgical treatment. Therefore, it is important to improve the surgical approaches and treatment tactics in...
INTRODUCTION
There are a number of thyroid gland diseases that require surgical treatment. Therefore, it is important to improve the surgical approaches and treatment tactics in patients that need such surgery.
AIM
To provide an algorithm to prevent parathyroid gland damage during surgery.
MATERIALS AND METHODS
This work was based on treatment results of 226 patients with different thyroid diseases. All patients received extrafascial surgical interventions using modern methodological approaches. For prevention of postoperative hypoparathyroidism, we used the "stress-test", 5-aminolevulenic acid, and a method of double visual-instrumental registration of photosensitizer-induced fluorescence of parathyroid glands.
RESULTS
Transient hypoparathyroidism was registered in four (1.8%) cases after surgery. Permanent hypocalcemia in patients was not recorded. Autotransplantation of parathyroid gland was required only in one case (0.44%). A deficiency or low level of vitamin D was detected in 35% of the cases, and in the majority of those cases, it was due to secondary hyperparathyroidism. The deficiency was corrected with the administration of vitamin D in all cases. In 10.17% (23 patients) of cases, there was no proper visual glow effect after administration of 5-aminolevulinic acid (5-ALA), which required proceeding to the second part of the proposed method (a helium-neon laser and registration of fluorescence using a laser spectrum analyzer).
CONCLUSIONS
The proposed methodological approach allows prevention of persistent hypoparathyroidism and reduces the frequency of transient hypoparathyroidism and other complications in surgical treatment of patients with various thyroid gland diseases.
Topics: Humans; Parathyroid Glands; Thyroidectomy; Hypoparathyroidism; Thyroid Diseases; Vitamin D; Vitamins; Postoperative Complications; Retrospective Studies
PubMed: 37144304
DOI: 10.3897/folmed.65.e75427 -
Frontiers in Endocrinology 2023The accurate detection of parathyroid glands (PGs) during surgery is of great significance in thyroidectomy and parathyroidectomy, which protects the function of normal... (Review)
Review
The accurate detection of parathyroid glands (PGs) during surgery is of great significance in thyroidectomy and parathyroidectomy, which protects the function of normal PGs to prevent postoperative hypoparathyroidism and the thorough removal of parathyroid lesions. Existing conventional imaging techniques have certain limitations in the real-time exploration of PGs. In recent years, a new, real-time, and non-invasive imaging system known as the near-infrared autofluorescence (NIRAF) imaging system has been developed to detect PGs. Several studies have confirmed that this system has a high parathyroid recognition rate and can reduce the occurrence of transient hypoparathyroidism after surgery. The NIRAF imaging system, like a magic mirror, can monitor the PGs during surgery in real time, thus providing great support for surgeries. In addition, the NIRAF imaging system can evaluate the blood supply of PGs by utilizing indocyanine green (ICG) to guide surgical strategies. The NIRAF imaging system and ICG complement each other to protect normal parathyroid function and reduce postoperative complications. This article reviews the effectiveness of the NIRAF imaging system in thyroidectomies and parathyroidectomies and briefly discusses some existing problems and prospects for the future.
Topics: Humans; Parathyroid Glands; Optical Imaging; Parathyroidectomy; Hypoparathyroidism; Indocyanine Green; Monitoring, Intraoperative
PubMed: 37284221
DOI: 10.3389/fendo.2023.1160902 -
Lin Chuang Er Bi Yan Hou Tou Jing Wai... May 2022The main causes of hypoparathyroidism are unintentional parathyroidectomy and/or impaired blood supply. Therefore, accurate identification and preservation of... (Review)
Review
The main causes of hypoparathyroidism are unintentional parathyroidectomy and/or impaired blood supply. Therefore, accurate identification and preservation of parathyroid glands in situ during thyroid or parathyroid surgery has become one of the problems that plague endocrine surgeons. In recent years, near-infrared autofluorescence imaging technology has gradually attracted more and more attention from surgeons because of its simplicity, safety, accuracy, real-time, no-contrast agent, and non-invasiveness. This article reviews the development history, clinical application, and application prospects of the parathyroid gland autofluorescence imaging technology in recent years.
Topics: Humans; Hypoparathyroidism; Optical Imaging; Parathyroid Glands; Parathyroidectomy; Thyroidectomy
PubMed: 35483695
DOI: 10.13201/j.issn.2096-7993.2022.05.016 -
Journal of Biophotonics Jun 2021During thyroid surgeries, it is important for surgeons to accurately identify healthy parathyroid glands and assess their vascularity to preserve their function...
During thyroid surgeries, it is important for surgeons to accurately identify healthy parathyroid glands and assess their vascularity to preserve their function postoperatively, thus preventing hypoparathyroidism and hypocalcemia. Near infrared autofluorescence detection enables parathyroid identification, while laser speckle contrast imaging allows assessment of parathyroid vascularity. Here, we present an imaging system combining the two techniques to perform both functions, simultaneously and label-free. An algorithm to automate the segmentation of a parathyroid gland in the fluorescence image to determine its average speckle contrast is also presented, reducing a barrier to clinical translation. Results from imaging ex vivo tissue samples show that the algorithm is equivalent to manual segmentation. Intraoperative images from representative procedures are presented showing successful implementation of the device to identify and assess vascularity of healthy and diseased parathyroid glands.
Topics: Diagnostic Imaging; Optical Imaging; Parathyroid Glands; Parathyroidectomy; Thyroid Gland; Thyroidectomy
PubMed: 33583122
DOI: 10.1002/jbio.202100008 -
Kidney International Mar 2024The parathyroid gland is one of the main organs that regulate calcium and phosphorus metabolism. It is mainly composed of chief cells and oxyphil cells. Oxyphil cell...
The parathyroid gland is one of the main organs that regulate calcium and phosphorus metabolism. It is mainly composed of chief cells and oxyphil cells. Oxyphil cell counts are low in the parathyroid glands of healthy adults but are dramatically increased in patients with uremia and secondary hyperparathyroidism (SHPT). Increased oxyphil cell counts are related to drug treatment resistance, but the origin of oxyphil cells and the mechanism of proliferation remain unknown. Herein, three types of parathyroid nodules (chief cell nodules, oxyphil cell nodules and mixed nodules, respectively) excised from parathyroid glands of uremic SHPT patients were used for single-cell RNA sequencing (scRNA-seq), other molecular biology studies, and transplantation into nude mice. Through scRNA-seq of parathyroid mixed nodules from three patients with uremic SHPT, we established the first transcriptomic map of the human parathyroid and found a chief-to-oxyphil cell transdifferentiation characterized by gradual mitochondrial enrichment associated with the uremic milieu. Notably, the mitochondrial enrichment and cellular proliferation of chief cell and oxyphil cell nodules decreased significantly after leaving the uremic milieu via transplantation into nude mice. Remarkably, the phenotype of oxyphil cell nodules improved significantly in the nude mice as characterized by decreased mitochondrial content and the proportion of oxyphil cells to chief cells. Thus, our study provides a comprehensive single-cell transcriptome atlas of the human parathyroid and elucidates the origin of parathyroid oxyphil cells and their underlying transdifferentiating mechanism. These findings enhance our understanding of parathyroid disease and may open new treatment perspectives for patients with chronic kidney disease.
Topics: Adult; Animals; Mice; Humans; Parathyroid Glands; Oxyphil Cells; Mice, Nude; Cell Transdifferentiation; Hyperparathyroidism, Secondary; Sequence Analysis, RNA
PubMed: 38142040
DOI: 10.1016/j.kint.2023.11.027 -
Otolaryngologic Clinics of North America Feb 2024Postoperative hypoparathyroidism may cause significant patient morbidity and even mortality. Emerging technologies centered on autofluorescent properties of parathyroid... (Review)
Review
Postoperative hypoparathyroidism may cause significant patient morbidity and even mortality. Emerging technologies centered on autofluorescent properties of parathyroid glands when exposed to near-infrared light hold promise to improve surgical parathyroid gland identification and preservation. Two systems (probe-based and camera-based) are commercially available currently; however, neither system alone provides indication of vascular viability or postoperative parathyroid gland function. The administration of indocyanine green, when combined with near-infrared fluorescence imaging, enables subjective assessment of parathyroid gland perfusion. Additional technologies to assess parathyroid gland perfusion are being developed. The impact of these nascent technologies on relevant clinical outcomes is an area of active investigation.
Topics: Humans; Parathyroid Glands; Thyroidectomy; Hypoparathyroidism; Indocyanine Green; Optical Imaging
PubMed: 37634981
DOI: 10.1016/j.otc.2023.07.011 -
Frontiers in Endocrinology 2023Parathyroid glands may be compromised during thyroid surgery which can lead to hypoparathyroidism and hypocalcemia. Identifying the parathyroid glands relies on the...
INTRODUCTION
Parathyroid glands may be compromised during thyroid surgery which can lead to hypoparathyroidism and hypocalcemia. Identifying the parathyroid glands relies on the surgeon's experience and the only way to confirm their presence was through tissue biopsy. Near infrared autofluorescence technology offers an opportunity for real-time, non-invasive identification of the parathyroid glands.
METHODS
We used a new research prototype (hANDY-I) developed by Optosurgical, LLC. It offers coaxial excitation light and a dual-Red Green Blue/Near Infrared sensor that guides anatomical landmarks and can aid in identification of parathyroid glands by showing a combined autofluorescence and colored image simultaneously.
RESULTS
We tested the imager during 23 thyroid surgery cases, where initial clinical feasibility data showed that out of 75 parathyroid glands inspected, 71 showed strong autofluorescence signal and were correctly identified (95% accuracy) by the imager.
CONCLUSIONS
The hANDY-I prototype demonstrated promising results in this feasibility study by aiding in real-time visualization of the parathyroid glands. However, further testing by conducting randomized clinical trials with a bigger sample size is required to study the effect on levels of hypoparathyroidism and hypocalcemia.
Topics: Humans; Parathyroid Glands; Feasibility Studies; Thyroidectomy; Hypocalcemia; Optical Imaging; Hypoparathyroidism
PubMed: 37554762
DOI: 10.3389/fendo.2023.1190282 -
Problemy Endokrinologii Aug 2021Hypoparathyroidism is a rare disorder characterized by the absent or inappropriately decreased serum parathyroid hormone in the parathyroid glands, which is accompanied... (Review)
Review
Hypoparathyroidism is a rare disorder characterized by the absent or inappropriately decreased serum parathyroid hormone in the parathyroid glands, which is accompanied by impaired calcium-phosphorus metabolism.The main etiology of hypoparathyroidism remains damage or removal of the parathyroid glands during neck surgery. In view of the incidence of thyroid cancer, primary hyperparathyroidism and other pathologies of the neck organs, which radical treatment can lead to the parathyroid gland impairment, an increased number of patients with hypoparathyroidism is expected. Autoimmune hypoparathyroidism is the second most common form of the disease, usually occurring as part of type 1 autoimmune polyglandular syndrome. Autoimmune hypoparathyroidism usually occurs in childhood and is characterized by a severe course of the disease, especially in the case of concomitant malabsorption syndrome.Chronic hypoparathyroidism of any etiology requires lifelong multicomponent therapy, as well as careful monitoring and an individual approach to choose the optimal treatment strategy. In the absence of adequate follow-up, the risks of long-term complications significantly increase, particularly in the renal, cardiovascular systems; in the soft tissues and in the brain, it could lead to visual disturbances; pathology of the musculoskeletal system with a decreased bone remodeling and a potential risk of fractures, as well as to the neurocognitive disorders and an impaired health-related quality of life.Timely diagnosis, rational medical therapy and management strategy may reduce the risks of short-term and long-term complications, frequency of hospitalizations and disability of patients, as well as improve the prognosis.This review covers the main issues of Russian guidelines for the management of chronic hypoparathyroidism, approved in 2021, including laboratory and instrumental evaluation, treatment approaches and follow-up. This guidelines also include the recommendations for special groups of patients: with acute hypocalcemia, hypoparathyroidism during pregnancy.
Topics: Humans; Hypocalcemia; Hypoparathyroidism; Parathyroid Glands; Parathyroid Hormone; Quality of Life
PubMed: 34533015
DOI: 10.14341/probl12800 -
Molecules (Basel, Switzerland) Jul 2019Injury to parathyroid glands during thyroid and parathyroid surgery is common and postoperative hypoparathyroidism represents a serious complication. Parathyroid glands...
Injury to parathyroid glands during thyroid and parathyroid surgery is common and postoperative hypoparathyroidism represents a serious complication. Parathyroid glands possess a unique autofluorescence in the near-infrared spectrum which could be used for their identification and protection at an early stage of the operation. In the present study parathyroid autofluorescence was visualized intraoperatively using a standard Storz laparoscopic near-infrared/indocyanine green (NIR/ICG) imaging system with minor modifications to the xenon light source (filtered to emit 690 nm to 790 nm light, less than 1% in the red and green above 470 nm and no blue light). During exposure to NIR light parathyroid tissue was expected to show autofluorescence at 820 nm, captured in the blue channel of the camera. Over a period of 5 years, we investigated 205 parathyroid glands from 117 patients. 179 (87.3%) glands were correctly identified by their autofluorescence. Surrounding structures such as thyroid, lymph nodes, muscle, or adipose tissue did not reveal substantial autofluorescence. We conclude that parathyroid glands can be identified by their unique autofluorescence at an early stage of the operation. This may help to preserve these fragile structures and their vascularization and lower the rate of postoperative hypocalcemia.
Topics: Humans; Intraoperative Care; Optical Imaging; Parathyroid Glands; Parathyroidectomy; Spectroscopy, Near-Infrared; Thyroid Gland; Thyroidectomy
PubMed: 31337096
DOI: 10.3390/molecules24142560 -
Clinical Laboratory Mar 2020Primary hyperparathyroidism (pHPT) is a common endocrine disorder, due to an excessive secretion of parathyroid hormone (PTH) from one or more parathyroid gland(s),... (Review)
Review
BACKGROUND
Primary hyperparathyroidism (pHPT) is a common endocrine disorder, due to an excessive secretion of parathyroid hormone (PTH) from one or more parathyroid gland(s), where the only cure remains surgery. The surgical approach has become less invasive over the years, thanks to the advances in the preoperative localization of the enlarged parathyroid gland, as well as to the possibility to measure intra-operative parathyroid hormone (IOPTH). After the targeted removal of a parathyroid gland, IOPTH can confirm biochemically the cure of pHPT, such that it helps the surgeon to judge if the parathyroidectomy has been successful and there is no need of additional dissection. As with all laboratory tests, the quality of IOPTH total testing process is essential to the best utilization of patients' results. However, this can be affected by errors occurring in different phases. This review aims to describe the total testing process of IOPTH.
METHODS
We performed a search in Pubmed and a review of the literature on the current management of pHPT and the total testing process of IOPTH measurement.
RESULTS
Compared to previous studies focusing on single aspects of the IOPTH testing process, here we have analyzed all the steps crucial for the quality of IOPTH from the "pre-pre" to the "post-post" analytical phase.
CONCLUSIONS
Clinicians and laboratory scientists should be aware of all the potential sources of errors in IOPTH measurement in order to improve their daily management of pHPT.
Topics: Humans; Hyperparathyroidism, Primary; Intraoperative Care; Minimally Invasive Surgical Procedures; Operative Time; Parathyroid Glands; Parathyroid Hormone; Parathyroidectomy; Treatment Outcome
PubMed: 32162870
DOI: 10.7754/Clin.Lab.2019.190411