Ultrasound-guided nerve block has the characteristics of high success rate, few complications, and high patient satisfaction. It has been widely used in brachial plexus and lumbar plexus nerve blocks. Studies of ultrasound-guided superficial cervical plexus block are mostly unsatisfactory, and may be due to anatomic localization of the puncture site rather than real-time ultrasound guidance. The great auricular nerve is the largest branch of the superficial cervical plexus and may be identified under ultrasound. The aim of this study is to establish the success rate of identification of the great auricular nerve by combining ultrasound imaging with transcutaneous nerve stimulation. In addition, we will study the relationship between the success rate of identification and the related factors of patients. Another purpose of this study is to locate the position where the great auricular nerve emerges the posterior border of the sternocleidomastoid muscle. The relationship between this point and the midpoint of posterior border of the sternocleidomastoid muscle and adjacent structures will also be studied.
Study Type
OBSERVATIONAL
Enrollment
300
Changzheng Hospital
Shanghai, Shanghai Municipality, China
RECRUITINGSuccess rate of identification of the great auricular nerve combining ultrasound imaging with transcutaneous nerve stimulation
Proportion of patients who's great auricular nerve was identified by combining ultrasound imaging with transcutaneous nerve stimulation
Time frame: 1 year
Difference in gender
Patients were divided into two groups according to whether they recognized the great auricular nerve or not, and the differences in gender composition were compared.
Time frame: 1 year
Difference in BMI
Patients were divided into two groups according to whether they recognized the great auricular nerve or not, and the differences in BMI were compared.
Time frame: 1 year
Difference in body fat rate
Patients were divided into two groups according to whether they recognized the great auricular nerve or not, and the differences in body fat rate were compared.
Time frame: 1 year
Difference in neck circumference
Patients were divided into two groups according to whether they recognized the great auricular nerve or not, and the differences in neck circumference were compared.
Time frame: 1 year
Success rate of identification of the great auricular nerve by ultrasound
Proportion of patients who's great auricular nerve was identified by ultrasound
Time frame: 1 year
Distance between GAP and M
the distance between the point where the great auricular nerve emerges the posterior border of the sternocleidomastoid muscle and the midpoint of posterior border of the sternocleidomastoid muscle
Time frame: 1 year
SCM length
length of the posterior border of the sternocleidomastoid muscle
Time frame: 1 year
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