Arthroscopic shoulder surgery is an increasingly mature minimally invasive diagnosis and treatment technology in treating rotator cuff injury. However, the accumulation of perfusion fluid in the joint cavity during the operation may result in limb swelling, postoperative pain, airway edema, stenosis or obstruction caused by upper airway compression, and even extend decannulation time pneumothorax and electrolyte disturbance. Therefore, selecting appropriate perfusion pressure and flow rate, controlling the total amount and retention of a perfusion fluid, ensuring intraoperative safety, optimizing the pain experience of patients, and promoting the functional rehabilitation of shoulder joint have become concerns for this type of surgery. Low perfusion pressure is considered to help reduce the accumulation of perfusion fluid. However, it is still unknown whether the perfusion flow rate will affect the operation process and interfere with the rehabilitation effect of patients under the premise of controlling the perfusion pressure.

To explore the application effect of perfusion flow on shoulder surgical operations, limb swelling, pain, and rehabilitation of patients undergoing shoulder arthroscopy.

From June 2020 to September 2020, 92 patients who underwent shoulder arthroscopic rotator cuff repair in our hospital were randomly divided into three groups. The irrigation flow was 0.6 L/min, 0.8 L/min, and 1.0 L/min, respectively. The demographic data, operation time, total amount and retention of irrigation fluid, and the changes of neck circumference, chest circumference, arm circumference, and deltoid circumference before and after operation were recorded. The preoperative, 3-month postoperative, 6-month postoperative VAS scores, and ASES scores were tested as well.

There was no significant difference in operation time, total amount and retention of irrigation fluid, limb swelling degree, or pain relief degree of patients with different perfusion flows (P>0.05) . There was no significant difference in the effect of diverse perfusion flow rates on the postoperative rehabilitation of shoulder function at 3^rd month (Z=4.439, P>0.05) . The difference was statistically significant at the 6^th month (Z=6.176, P<0.05) . The postoperative rehabilitation effect of 0.6L/min perfusion flow rate was better than that of 1.0 L/min perfusion flow rate at the 6^th month.

Lower perfusion flow rate (0.6 L/min) during shoulder arthroscopy ensures the operation is unaffected. It suggests that the long-term functional rehabilitation effect of patients is more remarkable, which deserves attention.