Department of Exercise Science, Physical Therapy Program, University of South Carolina, Blatt PE Center, 101G, Columbia, SC 29208 (USA).
Department of Physical Therapy, Creighton University, Omaha, Nebraska.
Phys Ther. 2020 Mar 10;100(3):429-437. doi: 10.1093/ptj/pzz174.
Decreased pectoralis minor muscle length is common after primary breast cancer treatment and can result in an abnormal position of the scapula. This position can contribute to shoulder pain and pathomechanics and can lead to problems such as impingement syndrome, rotator cuff tears, and frozen shoulder. Currently, there are limited reliable methods for measuring pectoralis minor length.
The objective of this study was to examine the reliability and validity of measuring pectoralis minor length in women diagnosed with breast cancer.
This was a cross-sectional reliability and validity study.
Bilateral pectoralis minor length (in centimeters) was assessed using a palpation meter in women (N = 29) diagnosed with breast cancer by 2 licensed physical therapists who were masked to the measures. Bilateral pectoralis minor length was also measured using a motion capture system to assess validity.
Intratester reliability (intraclass correlation coefficient, ICC [3,k] = 0.971; 95% confidence interval [CI] = 0.939-0.986; standard error of measurement [SEM] = 0.16 cm) and intertester reliability (ICC[3,k] = 0.915; 95% CI = 0.81-0.962; SEM = 0.31 cm) were excellent for the palpation meter on the affected side and the unaffected side (intratester reliability: ICC[3,k] = 0.951; 95% CI = 0.897-0.977; SEM = 0.19 cm; intertester reliability: ICC[3,k] = 0.945; 95% CI = 0.877-0.975; SEM = 0.22 cm). Significant correlations were found between the motion capture system and the palpation meter on the affected side (r = 0.87) and the unaffected side (r = 0.81). Bland-Altman plots between the palpation meter and the motion capture system demonstrated that all the measures fell within the limits of agreement.
This study encountered possible errors with the accuracy of the motion capture system tracking because of the proximity of the markers and inherent volumetric restrictions.
The palpation meter is a reliable, valid, easily administered, and cost-effective tool for assessing pectoralis minor length in women with breast cancer.
原发性乳腺癌治疗后，胸小肌长度缩短较为常见，可导致肩胛骨位置异常。这种位置会导致肩部疼痛和病理力学改变，并导致撞击综合征、肩袖撕裂和冻结肩等问题。目前，测量胸小肌长度的可靠方法有限。
本研究旨在探讨测量乳腺癌女性胸小肌长度的可靠性和有效性。
这是一项横断面可靠性和有效性研究。
两名持有执照的物理治疗师对 29 名被诊断患有乳腺癌的女性使用触诊计测量双侧胸小肌长度（以厘米为单位），这些治疗师对测量结果进行了屏蔽。还使用运动捕捉系统测量双侧胸小肌长度以评估有效性。
触诊计在患侧和健侧的内部测试者可靠性（组内相关系数 ICC[3,k]为 0.971；95%置信区间 CI[3,k]为 0.939-0.986；测量误差 SEM 为 0.16cm）和外部测试者可靠性（ICC[3,k]为 0.915；95%CI[3,k]为 0.81-0.962；SEM 为 0.31cm）均为优秀。触诊计在患侧和健侧的内部测试者可靠性（ICC[3,k]为 0.951；95%CI[3,k]为 0.897-0.977；SEM 为 0.19cm；外部测试者可靠性：ICC[3,k]为 0.945；95%CI[3,k]为 0.877-0.975；SEM 为 0.22cm）。运动捕捉系统与触诊计在患侧（r=0.87）和健侧（r=0.81）之间存在显著相关性。触诊计和运动捕捉系统之间的 Bland-Altman 图表明，所有测量值均在一致性界限内。
由于标记物的接近度和固有的体积限制，本研究可能会遇到运动捕捉系统跟踪准确性方面的误差。
触诊计是一种可靠、有效、易于管理且具有成本效益的工具，可用于评估乳腺癌女性的胸小肌长度。
