Abstract
This paper aimed to explore dexmedetomidine combined local anesthetics in brachial plexus block through ultrasound imaging (UI) under global joint entropy algorithm. Patients who underwent upper limb surgery and brachial plexus block were selected as research objects. Patients in group A were given 0.375% ropivacaine and normal saline, and patients in group B were given 0.375% ropivacaine and 1.0 μg/kg dexmedetomidine. The results of UI were analyzed by global joint entropy-based K-means clustering (GKC) algorithm, and the use effects of the two methods were compared in combination with other postanesthesia manifestations. The results were as follows. The segmentation accuracy (96.21% and 83.52%) of GKC was higher than 82.21% and 70.52% of the local joint entropy-based K-means clustering (LKC) ( P < 0.05 ). The duration of sensory and motor block (352.78 ± 45.89 min and 324.38 ± 41.29 min) in group B was significantly longer than 292.28 ± 35.69 min and 256.58 ± 42.76 min in group A ( P < 0.05 ). Compared with 84.91 ± 8.77 beats/min and 89.58 ± 7.62 beats/min in group A, mean arterial pressure (70.24 ± 9.77 beats/min and 69.89 ± 8.97 beats/min) in group B was lower at T1 and T2 ( P < 0.05 ). The duration of postoperative pain (582.70 ± 51.89 min) in group B was longer than 372.89 ± 49.89 min in group A ( P < 0.05 ). The postoperative pain score (2.98 ± 1.08) in group B was significantly lower than 4.48 ± 2.19 in group A ( P < 0.05 ). Therefore, dexmedetomidine combined local anesthetics could prolong the duration of sensory and motor nerve block. Besides, dexmedetomidine had sedative and analgesic effects, so as to prolong postoperative pain time and reduce pain degree of patients.
Highlights
Brachial plexus block is a commonly applied method of anesthesia in upper limb surgery
Based on a random number table method, they were enrolled into groups A and B (40 cases in each group). e grading of American Association of Anesthesiologists (ASA) included the 3 grades (I, II, and III)
In order to compare the effects of global joint entropy-based K-means clustering (GKC) and LKC, they were adopted in the ultrasonic images of 80 patients with brachial plexus block anesthesia, and the effects of GKC were significantly better than those of LKC (P < 0.05)
Summary
Brachial plexus block is a commonly applied method of anesthesia in upper limb surgery. It is an anesthetic method in which local anesthetics are injected around the brachial plexus nerve trunk to produce nerve conduction block in the area [1]. Brachial plexus block can generally be blocked by the intermuscular groove approach between the anterior and middle scalene muscles. It can be blocked by the supraclavicular or the axillary approaches. When the patient will feel pain that is caused by the generated stretch during the surgery, analgesia should be conducted
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
