Comparison of CEUS With Conventional Ultrasound (US) to Dual-tracer 99mTcO4-/99mTc-MIBI Subtraction Scintigraphy With SPECT/CT for Localizing Pathological Parathyroid Glands in Patients With Primary Hyperparathyroidism
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 172
- 试验地点
- 2
- 主要终点
- Sensitivity of surgeon-performed conventional ultrasound
研究概览
简要总结
The purpose of this project is to examine, in a non-inferiority study, whether the combination of conventional ultrasound and contrast-enhanced ultrasound (CEUS) can replace the radiation-based imaging modalities that are currently used to localize pathological parathyroid glands prior to surgical removal in patients with primary hyperparathyroidism.
This will take the form of a prospective paired cohort study where included patients receive a contrast-enhanced ultrasound examination in addition to the standard preoperative imaging regimen (subtraction scintigraphy with SPECT/CT and conventional ultrasound). Patients act as their own controls as all included patients undergo both CEUS and conventional imaging.
详细描述
The human body has four parathyroid glands. These are located in the neck at the backside of the thyroid gland. The four glands produce parathyroid hormone which regulates the amount of calcium in the blood. If one or more of the thyroid glands becomes hyperactive, too much parathyroid hormone is secreted into the blood. This condition is called hyperparathyroidism and results in elevated serum calcium levels. If left untreated, hyperparathyroidism may result in weak bones (osteoporosis), bone fractures, kidney stones and a myriad of unspecific symptoms.
In the vast majority of cases, only one of the four parathyroid glands is responsible for the disease, and the cure is surgical excision of the hyperactive gland. Such a surgery has traditionally involved a dissection of both sides of the neck, allowing the surgeon to visually inspect all four parathyroid glands to determine which gland(s) were hyperactive. Nowadays, if the hyperactive gland can be identified by parathyroid imaging prior to surgery, the surgeon can perform a minimally invasive procedure, focusing on the removal of a single gland. Such a focused procedure minimizes surgical risks and results in a shorter duration of surgery.
The parathyroid imaging regimen currently requires two out-patient visits on two separate days. The patient first visits the Department of Nuclear Medicine where a scan involving two radioactive tracers (a subtraction scintigraphy) and a 3D-examination (a SPECT/CT scan) are performed. The second visit takes place at the department of Head and Neck Surgery, where a head and neck surgeon performs an ultrasound examination of the neck.
The scans at the Department of Nuclear Medicine require the patient to lie completely still for a long time, expose the patient to some degree of radiation, and are relatively expensive. The ultrasound examination is fast and inexpensive, but isn't as sensitive as the scintigraphy (76% versus 70-92%).
Our project attempts to increase the sensitivity of the ultrasound examination by adding on an intravenous contrast agent. The contrast agent stays solely within the blood vessels, where it enhances the ultrasound signal. Contrast-enhanced ultrasound (CEUS) does not expose the patient to radiation, is fast to carry out, and the patient can be informed about the result of the scan immediately.
研究设计
- 研究类型
- Interventional
- 分配方式
- Non Randomized
- 干预模型
- Parallel
- 主要目的
- Diagnostic
- 盲法
- Single (Investigator)
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Patients 18 years and older with primary hyperparathyroidism (defined as an ionized calcium level above the upper reference level and a concomitant parathyroid hormone level in or above the upper third of the reference interval with no other known reason for the hyperparathyroid hypercalcemia) referred to the Department of ORL, Head and Neck Surgery at Odense University Hospital for parathyroidectomy.
排除标准
- •Allergy to the contrast agent SonoVue®.
- •Not legally competent.
- •Does not read or speak Danish.
- •Other causes of hypercalcemia (e.g. familial hypocalciuric hypercalcemia, pharmacologically or neoplastically induced hypercalcemia, secondary or tertiary hypercalcemia, uncontrolled hyperthyroidism, adrenal insufficiency, granulomatous diseases).
- •Persistent or recurrent hyperparathyroidism.
- •Previous surgery to the thyroid or the parathyroid glands.
- •Current malignancy.
- •Breastfeeding.
- •Pregnancy.
- •Contraindications to the use of SonoVue® (right-to-left shunts, severe pulmonary hypertension (pulmonary pressure >90 mmHg), uncontrolled systemic hypertension, adult respiratory distress syndrome, recent acute coronary syndrome, clinically unstable ischaemic cardiac disease within the last seven days, severe heart rhythm disorders, acute heart failure, or chronic heart failure class III or IV according to the New York Heart Association).
结局指标
主要结局
Sensitivity of surgeon-performed conventional ultrasound
时间窗: No residual disease 6 months after surgery
With the histopathological result of the surgically removed specimen(s) as the reference standard, what is the sensitivity, specificity, positive and negative predictive value of the following imaging modalities in localising pathological parathyroid glands to the correct side, quadrant, and Odense Classification? a. Surgeon-performed conventional ultrasound
Sensitivity of contrast-enhanced ultrasound
时间窗: No residual disease 6 months after surgery
With the histopathological result of the surgically removed specimen(s) as the reference standard, what is the sensitivity, specificity, positive and negative predictive value of the following imaging modalities in localising pathological parathyroid glands to the correct side, quadrant, and Odense Classification? b. Surgeon-performed conventional ultrasound combined with contrast-enhanced ultrasound (CEUS).
Sensitivity of radiation based imaging
时间窗: No residual disease 6 months after surgery
With the histopathological result of the surgically removed specimen(s) as the reference standard, what is the sensitivity, specificity, positive and negative predictive value of the following imaging modalities in localising pathological parathyroid glands to the correct side, quadrant, and Odense Classification? c. Dual-tracer 99mTechnetium-pertechnetate/ 99mTechnetium-sestamibi subtraction scintigraphy (99mTcO4-/99mTc-MIBI) with single-photon emission computerised tomographic/CT fusion imaging (SPECT/CT).
次要结局
未报告次要终点
研究者
Sanne Høxbroe Michaelsen
Principal Investigator
Odense University Hospital