A Case-Control Pilot Study on the Biomechanical Effects of Wearing a Sacroiliac Belt in Women
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 10
- 主要终点
- Explore if 95% confidence ellipse area of the center of pressure or kinematic measures can distinguish women with PGP from women without PGP when a SI belt is applied
研究概览
简要总结
Women with pelvic girdle pain PGP) often get relief from using a sacroiliac belt. The study will explore if there are differences and in the changes of lower body movement in stability with the belt on and with the belt off. Women with PGP will be matched with women without to explore if there is a difference between these two groups. This will be looked at in standing and in walking.
详细描述
SacroIliac (SI) joint dysfunction (also called pelvic girdle pain) has been associated with impaired load transfer across the lumbopelvic region. This can result in lower back pain as well as poor biomechanical adaptation during walking. Sacroiliac (SI) belts have typically been prescribed in order to mitigate pain and improve load transfer in individuals with SI joint dysfunction. It has been speculated that SI belts have the ability to instantaneously increase joint stability, and as a result improve load transfer and muscle activation and recruitment. However, this speculation is primarily based on anecdotal evidence; there is little biomechanical research supporting the effects of wearing an SI belt. In order to gain an improved understanding of the biomechanical effects of wearing an SI belt, the investigators propose to conduct a study with the following key objectives:
- Determine if there are differences with respect to neuromuscular, kinematic, or pressure patterns during walking and/or standing between healthy stable individuals and individuals with SI joint dysfunction
- Determine if wearing an SI belt affects neuromuscular, kinematic, or pressure patterns during walking and/or standing in women with sacroiliac instability
Variables measured will include:
- Kinematics will be collected to quantify posture and joint angles
- Kinetics will be collected to quantify ground reaction forces
- Plantar pressure will be collected to quantify force distribution and center or pressure
- Joint moments (Lumbar-pelvic and Hip) will be added as variables. The investigators will use inverse dynamics to calculate various joint moments during walking.
研究设计
- 研究类型
- Interventional
- 分配方式
- Na
- 干预模型
- Single Group
- 主要目的
- Screening
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 50 Years（Adult）
- 性别
- Female
- 接受健康志愿者
- 是
入选标准
- •Individuals with isolated SI joint dysfunction
- •Individuals with shoe size 6, 7, 8 or 9 US
- •and matched controls by age (within 5 years), BMI (within one point) and parity
排除标准
- •Pregnancy in the last year or presently pregnant
- •Significant lumbar dysfunction
- •Significant hip dysfunction
- •Leg length discrepancy of 1 cm or more
- •Women who have previously undergone prolotherapy or SI joint injections
- •Women with previous lower back, hip, knee or ankle surgery
- •Inability to stand for 60 sec unaided or to walk unaided.
结局指标
主要结局
Explore if 95% confidence ellipse area of the center of pressure or kinematic measures can distinguish women with PGP from women without PGP when a SI belt is applied
时间窗: within 2 months of enrollment, measured at one point in time
Pressure insoles will be used to quantify the 95% confidence ellipse area of the CoP determined from each of the 2 feet, during the 30 second standing trials. The sampling will be compounded at a rate of 100 Hz and provided a time-pressure series with a range from 15 to 1200 kPa. The 95% confidence ellipse area of both feet will be summed. The average of the 3 trials will be used. Kinematic data will be collected using eight high speed video cameras at a sample rate of 240 Hz. All test subjects will be equipped with a marker set consisting of 32 light reflecting markers according to Visual3D (C-Motion, Inc., Germantown, USA) marker set guidelines. All measurements will be made on the right side. Walking speed will be monitored using photo electronic cells. Identified and averaged for 10 over-ground walking trials for each participant using custom Matlab software (MathWorks Inc., Natick, MA, USA).
次要结局
- 95% confidence ellipse area of the center of pressure(within 2 months of enrollment, measured at one point in time)
- kinematic changes of lower extremity(within 2 months of enrollment, measured at one point in time)