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Related Concept Videos

Hormones and Bone Tissue01:17

Hormones and Bone Tissue

The endocrine system produces and secretes hormones, which interact with the skeletal system. These hormones control bone growth, maintain bone once it is formed, and remodel it.
Hormones That Influence Osteoblasts and/or Maintain the Matrix
Several hormones are necessary for controlling bone growth and maintaining the bone matrix. The pituitary gland secretes growth hormone (GH), which, as its name implies, controls bone growth. This happens in several ways: first, it triggers chondrocyte...
Skeleton and Calcium Homeostasis01:21

Skeleton and Calcium Homeostasis

Calcium is not only the most abundant mineral in bone but also the most abundant mineral in the human body. Calcium ions are needed for bone mineralization, tooth health, heart rate regulation and strength of contraction, blood coagulation, the contraction of smooth and skeletal muscle cells, and the regulation of nerve impulse conduction. The average calcium level in the blood is about 10 mg/dL. When the body cannot maintain this level, a person will experience hypo or hypercalcemia.
The Parathyroid Glands00:59

The Parathyroid Glands

The two pairs of parathyroid glands embedded within the posterior surface of the thyroid gland are restricted by a dense capsule around them. These glands comprise two distinct cell populations—parathyroid oxyphil and parathyroid principal cells- pivotal in calcium homeostasis.
Oxyphil cells, whose functions remain elusive, emerge during late puberty, adding a layer of complexity to the parathyroid gland's intricacies. In contrast, principal parathyroid cells undertake a vital role by producing...
Bone Remodeling01:40

Bone Remodeling

Bone remodeling is a continuous and balanced process of bone resorption by osteoclasts and bone formation by osteoblasts. In adults, it helps maintain bone mass and calcium homeostasis. While mechanical stress can stimulate turnover as part of the normal maintenance and reparative process, several hormones also regulate bone remodeling.
Synthesis and Functions of Calcitonin00:51

Synthesis and Functions of Calcitonin

Calcitonin, a vital polypeptide hormone, regulates calcium levels within body fluids. It is released by the parafollicular cells, also known as C cells, situated in the follicular epithelium of the thyroid gland. Calcitonin responds to fluctuations in blood calcium levels and the influence of gastrointestinal hormones like gastrin and cholecystokinin.
The exact mechanisms by which calcitonin operates in calcium homeostasis remain elusive, but its significance is evident in several vital...
Graves Disease II: Pathophysiology01:24

Graves Disease II: Pathophysiology

Graves’ disease is an autoimmune disorder characterized by the production of thyroid-stimulating immunoglobulins (TSI) that activate TSH receptors, leading to excessive synthesis and release of thyroid hormones (T3 and T4) and resulting in hyperthyroidism.Among all causes of hyperthyroidism, Graves’ disease is the most common and can happen at any age, though it is more frequent in women. It produces a hypermetabolic state with features such as weight loss, tachycardia, tremor, and heat...

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Related Experiment Video

Updated: Jul 1, 2026

Generation of Hypoparathyroid Rats via Carbon-Nanoparticle-Assisted Parathyroidectomy
03:57

Generation of Hypoparathyroid Rats via Carbon-Nanoparticle-Assisted Parathyroidectomy

Published on: July 14, 2023

Improving postthyroidectomy care using a parathyroid hormone and calcium-based algorithm.

Ana Gheorghe-Milea1,2,3, Johannes H W de Wilt4, Han J Bonenkamp4

  • 15th Department of Medical Sciences, Department of Endocrinology, Iuliu Hațieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania.

European Journal of Endocrinology
|June 30, 2026
PubMed
Summary
This summary is machine-generated.

A new protocol for post-thyroidectomy care significantly reduced unscheduled referrals for hypocalcemia. Early parathyroid hormone (PTH) levels effectively predict hypocalcemia and permanent hypoparathyroidism (PhP) risk after thyroidectomy.

Keywords:
PTHhypoparathyroidismthyroidectomyunscheduled referrals

Related Experiment Videos

Last Updated: Jul 1, 2026

Generation of Hypoparathyroid Rats via Carbon-Nanoparticle-Assisted Parathyroidectomy
03:57

Generation of Hypoparathyroid Rats via Carbon-Nanoparticle-Assisted Parathyroidectomy

Published on: July 14, 2023

Area of Science:

  • Endocrinology
  • Surgical Oncology
  • Neurosurgery

Background:

  • Thyroidectomy is essential for thyroid disorders but risks iatrogenic hypoparathyroidism.
  • A standardized protocol using parathyroid hormone (PTH) and calcium levels was implemented in 2019 to manage hypocalcemia risk.
  • This protocol guides calcium and alfacalcidol supplementation post-surgery.

Purpose of the Study:

  • To evaluate the effectiveness of the standardized post-thyroidectomy protocol in reducing unscheduled referrals due to hypocalcemia.
  • To assess the predictive value of early postoperative PTH levels for permanent hypoparathyroidism (PhP).

Main Methods:

  • A retrospective observational cohort study compared 373 adult patients undergoing total/completion thyroidectomy.
  • Patients were divided into a pre-protocol historic cohort (N=219) and a post-protocol cohort (PPC) (N=154).
  • Data collected included unscheduled referrals, PTH levels, and calcium measurements.

Main Results:

  • The post-protocol cohort (PPC) showed significantly fewer unscheduled referrals (11%) compared to the historic cohort (19.2%) (p=0.034).
  • Early postoperative PTH levels significantly predicted unscheduled referrals (p=0.003), hypocalcemia (p<0.001), and PhP (p<0.001).
  • A PTH cutoff of 1.7 pmol/L demonstrated 100% sensitivity for predicting PhP.

Conclusions:

  • Implementation of the standardized protocol can decrease emergency consultations and hospital readmissions after thyroidectomy.
  • Utilizing early postoperative PTH levels aids in stratifying hypocalcemia risk and predicting permanent hypoparathyroidism.
  • This approach can improve healthcare resource utilization and optimize patient follow-up care.