The Use of Ultrasound for Botulinum Toxin Subscapularis Muscle Injection Guidance in Spastic Hemiplegic Shoulder Pain
The Use of Ultrasound for Botulinum Toxin Subscapularis Muscle Injection Guidance in Spastic Hemiplegic Shoulder Pain
The aim of the study is to describe the efficacy of a new approach to the subscapularis muscle under US guidance for the injection of botulinum toxin in patients that underwent a stroke suffering from hemiplegic shoulder pain.
Pain and spastic shoulder are common findings in hemiplegic patients following a stroke.
The pain interferes with rehabilitation prolonging hospitalization and is related with decreased quality of life.
There is a close relationship between spasticity of the subscapularis muscle and pain The patients show a clinical picture of adduction and internal rotation of the shoulder, elbow and wrist and fingers flexion with a limited external rotation of the shoulder.
The investigators suggest that paralyzing the subscapularis muscle with botulinum toxin may alleviate pain in the hemiplegic shoulder. Best produced when injected in a specific area of the muscle where a higher concentration of motor points exists.
Treatment using injection of botulinum toxin to the subscapularis spastic muscle has been described in the literature and is a common practice in hemiplegic shoulder. The Injection technic in this pathology is described by using anatomical landmarks of the shoulder region without using medical imaging.
On the other hand, injections to the subscapularis muscle has also been described using ultrasound guidance but not for this specific pathology.
There are no evidence-based guidelines describing us guided spastic subscapularis muscle injection. Injecting this muscle while in its spastic state requires a modulated approach Harrison et.al described cadaveric dissections of the subscapularis muscle and proposed a technique to reach the motor point zone of this muscle In our study the investigators follow the injection description published by Dong Wook Rha on cadavers based on Harrison's lateral approach description. The Ultrasound enables a correct identification of the target muscle avoiding possible complication of vessel or pulmonary puncture In our study the investigators will try to prove the efficacy of the lateral approach to the subscapularis muscle using ultrasound and nerve stimulator
Inclusion Criteria:
Post stroke patients
Exclusion Criteria:
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