Muscle Catabolism and Its Impact on Functional Outcomes in Children Following Cardiac Surgery
试验速览
- 阶段
- 不适用
- 状态
- 招募中
- 入组人数
- 64
- 试验地点
- 1
- 主要终点
- Change in lean body mass
研究概览
简要总结
Background & Significance. Children with congenital heart disease (CHD) have experienced improved postoperative survival shifting the focus away from minimizing mortality to curtailing morbidities. Critical illness following cardiac surgery induces catabolism which may impact functional status. Catabolism, a state in which protein breakdown exceeds protein synthesis, can lead to lean body mass (LBM) breakdown. LBM loss has been associated with poor clinical outcomes. Muscle ultrasound (mUS) has been utilized to measure LBM changes and the functional status score (FSS) was developed to assess functional status changes in children following hospitalization. The ability to identify LBM loss acutely and its association with FSS changes may lead to earlier interventions to preserve LBM and aid in outcome prediction.
Specific Aims & Hypotheses. Specific Aim 1 is to identify the percent change in LBM by mUS during the first postoperative week in children following complex cardiac surgery. Specific Aim 2 is to evaluate the relationship between percent change in LBM during the first postoperative week and the FSS at discharge and 6 and 12-month follow-up in children with CHD following complex cardiac surgery. The investigators hypothesize children with CHD following complex cardiac surgery will experience a decline in LBM and that there is a direct relationship between the change in LBM and postoperative FSS follow-up.
Study Design & Methods. The investigators are conducting a single-center, prospective, observational cohort study. Consecutive children (> 3 months and < 18 years of age) with CHD undergoing biventricular conversion will be enrolled. Patients will undergo a baseline mUS and FSS at the time of the index operation. Interval mUS will be obtained on the third and seventh postoperative day. Discharge mUS and FSS will be obtained and a remote FSS will be requested by the family at 6 and 12-months postoperatively. Demographics, pertinent laboratory, concomitant medications, nutrition and ultrasound variables will be collected.
Outcomes. The primary outcomes will be change in LBM during the first postoperative week and change in FSS at 6 and 12-month follow-up in children following complex cardiac surgery. Change in LBM will be defined as a percent change in cross-sectional area of the quadriceps muscle layer thickness (QMLT). Change in FSS will be significant if the score drops 3 points or more from baseline at postoperative follow-up.
详细描述
The central objective of our single center, pilot study in children with CHD following cardiac surgery is to identify serial changes in QMLT, as an estimate of LBM, during the first postoperative week, and to examine its relationship to functional status, assessed by FSS, after hospital discharge.
Primary Aim 1. To measure the percent change in QMLT by mUS during the first postoperative week in children undergoing complex cardiac surgery. The investigators hypothesize children undergoing complex cardiac surgery will have a mean decline of at least 10% in QMLT during the first postoperative week.
Primary Aim 2. To examine the relationship between percent change in QMLT during the first postoperative week and FSS at 3 and 6-months. The investigators hypothesize there is a direct relationship between percent change in QMLT during the first postoperative week and FSS at 3 and 6-months following surgery.
Secondary Aim 1. To explore the relationship between nitrogen balance, defined as the difference between total nitrogen intake and total urinary nitrogen loss, and mean change in QMLT during the first postoperative week. The investigators hypothesize there is a direct correlation between nitrogen balance and mean change in QMLT during the first postoperative week in children following complex cardiac surgery.
The proposed utilization of mUS to measure alterations in body composition during the acute phase of critical illness may provide early prediction of subsequent functional status decline.
研究设计
- 研究类型
- Observational
- 观察模型
- Cohort
- 时间视角
- Prospective
入排标准
- 年龄范围
- 3 Months 至 18 Years（Child, Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •children > 3 months and < 18 years old,
- •diagnosed with CHD, and
- •undergoing biventricular conversion.
排除标准
- •diagnosis of muscular dystrophy or myopathy,
- •lower extremity injury or infection during the current hospitalization,
- •enrolled in a concurrent nutritional intervention trial, or
- •admitted for palliative care.
结局指标
主要结局
Change in lean body mass
时间窗: 7 days postoperatively
The investigators are measuring the change in lean body mass estimated by quadriceps muscle layer thickness (QMLT)
Change in functional status
时间窗: 6 and 12 months
The investigators will measure functional status at 6 and 12-month follow-up to investigate the association between change in QMLT and functional status
次要结局
- Relationship of nitrogen balance to lean body mass changes(12-24 hours postoperatively)
研究者
Kimberly I. Mills, MD
Staff Physician
Boston Children's Hospital