Standardization of Indocyanine Green Lymphography Protocol With Exercise for Lymphedema Assessment
试验速览
- 阶段
- 4 期
- 状态
- 已完成
- 入组人数
- 9
- 试验地点
- 1
- 主要终点
- Time for Initial Disease Pattern to Appear
研究概览
简要总结
Indocyanine Green (ICG) lymphography is a relatively new imaging technique that allows for quick visualization of superficial lymph flow in real-time, without radiation exposure. This imaging is useful for diagnosing and assessing lymphedema. ICG lymphography has a higher sensitivity and specificity than lymphoscintigraphy, the current gold standard imaging device for lymphedema. ICG lymphography precisely and reliably diagnoses, tracks, and stages lymphedema severity, ranging from subclinical or early lymphedema to more advanced cases. The ICG contrast dye used to visualize the lymphatic system takes approximately six hours to plateau. Therefore, patients must wait six hours between their initial and delayed scans.
The purpose of this study is to determine if exercising on a Nu-step device between ICG initial and delayed scans would shorten the period of time a patient had to spend at the hospital on the day of their ICG lymphography.
The general procedures for this involve (after selecting subjects, consenting subjects, educating the subject on the protocol, along with other appropriate measures):
- Taking baseline vitals (HR & SpO2) and limb circumference measurements
- 5-minute period of time to acquaint subject with the exercise equipment (Nu-Step) at any level of exertion
- injection of contrast agent to allow for visualization of the superficial lymphatic system by a qualified nurse
- Initial scan
- A 5-minute period of exercise at "moderate" level of exercise (This correlates to the rating of perceived exertion levels of 12-13; All exercise periods should be at this level and will be monitored by a provider)
- Second scan & vitals
- 5-minute period of exercise
- Third scan & vitals
o Continue 5-minute exercise period followed by scan & vitals until disease pattern emerges
* Exercise for 5 minutes then scan and vitals until images reach steady state for two consecutive scans
- Final vitals (HR & SpO2)
* Repeat scan every 1 hour until the normal 6 hour scan to monitor for further changes in lymphatic pattern.
- Exit survey
详细描述
Following consent, the patients will answer the questions in the screening questionnaire and this data will be collected. Patients that do not screen out of the study (i.e. meet all inclusion criteria and none of the exclusion criteria) will continue with the study. Individuals who meet the exclusion criteria will not continue.
Study participants will be asked to go to the Rehabilitation Therapies clinic on the lower level of the main hospital for a one time visit. The visit will take approximately three to six hours.
During the visit, height and weight will be measured. Circumference measurements of the arms and legs will also be measured with a measuring tape. Bioimpedance analysis of the limb will be performed to assess the fluid content in the limbs.
Pain Ease numbing spray will have been applied to three injection sites on the affected arm or leg. 0.1ml of 0.25% Indocyanine green (ICG) dye will then be injected into the distal arm or leg at three separate sites: two interdigital injections and one injection in the volar wrist or posterior to the medial malleolus.
An immediate scan will be acquired using an ICG lymphography device. The scan will take approximately five minutes to complete. The data from this image will be considered baseline. This image is part of the patient's normal care at our institution and would be done even if the subject was not in this study.
研究设计
- 研究类型
- Interventional
- 分配方式
- Na
- 干预模型
- Single Group
- 主要目的
- Diagnostic
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 85 Years（Adult, Older Adult）
- 性别
- Female
- 接受健康志愿者
- 否
入选标准
- •Female patients
- •Suspected lymphedema or previously diagnosed lymphedema
- •Between the ages of 18-85 years old.
排除标准
- •Allergies to iodine
- •On daily heart medication
- •Have medical conditions affecting the heart, lungs or joint conditions that prevent prolonged physical activity of the arms or legs.
研究组 & 干预措施
Lymphedema
The subjects with lymphedema will be exercising on a Nu-Step exercise machine that will exercise their arms and legs simultaneously for five-minute intervals. Every five minutes their limbs will be imaged with Indocyanine Green Lymphography.
干预措施: Indocyanine Green (Drug)
结局指标
主要结局
Time for Initial Disease Pattern to Appear
时间窗: ICG scan is performed every 5 minutes with the test subjects exercising until the initial disease pattern is seen. We expect initial disease pattern to appear within a minute following administration of ICG.
After subjects exercise, this outcome will be measured by indocyanine green lymphography scans, a non-radioactive scan that visualizes the lymphatic system
次要结局
- Time to Reach Indocyanine Green Lymphography Steady State(ICG scan was performed every 5 minutes until lymphographic plateau was reached. The Lymphographic plateau is defined as having no observable changes in lymphographic patterns. We estimate all patients to reach plateau within 20 minutes.)