title: [Postoperative analgesia effect of different background volumes of ropivacaine in continuous tibial nerve block in patients with calcaneal surgery].
abstract: OBJECTIVE
  To observe the clinical effect of different background volumes of ropivacaine in continuous tibial nerve block of postoperative analgesia after calcaneal surgery.
  
  
  METHODS
  This study was a prospective, randomized, controlled study. Sixty cases of calcaneal visual analogue scale (ASA) I or II undergoing elective surgery were selected and randomly assigned to two groups, thirty cases in each group. The patients received popliteal fossa posterior tibial nerve block using ultrasound guided. The continuous stimulation catheter was inserted after successful position and the 0.2% ropivacaine was injected. The background volumes of the A and B groups were 5 mL/h and 3.2 mL/h. The VAS score, the sensory block and motor block of tibial nerve and common peroneal nerve, and the satisfaction of the patients at h 12, h 24 and h 48 were recorded after catheter insertion.
  
  
  RESULTS
  The VAS scores at the three time points (h 12, h 24 and h 48) on the two groups of the patients were compared, and the difference was not statistically significant (P > 0.05). The difference of the sensory block and the motor block of the tibial nerve at the three time points (h 12, h 24 and h 48) on the two groups of the patients were also compared, and the difference was not statistically significant (P> 0.05). The difference of the sensory block and the motor block of common peroneal nerve at h 48 hs was statistically significant, group A was higher than the group B (P< 0.05). The difference of the patient satisfaction at the three time points (h 12, h 24 and h 48) on the two groups was not statistically significant (P> 0.05).
  
  
  CONCLUSIONS
  The use of 0.2% ropivacaine with the background volume of 3.2 mL/h in continuous tibial nerve block can provide good analgesia and reduce the incidence of the sensory block and motor block of the common peroneal nerve.
authors.affiliation: Department of Anesthesia, Beijing Jishuitan Hospital, Beijing 100035, China.
authors.forename: J
authors.initials: J
authors.lastname: Yi
authors.affiliation: Department of Anesthesia, Beijing Jishuitan Hospital, Beijing 100035, China.
authors.forename: L
authors.initials: L
authors.lastname: Xu
authors.affiliation: Department of Anesthesia, Beijing Jishuitan Hospital, Beijing 100035, China.
authors.forename: H H
authors.initials: HH
authors.lastname: Lin
mesh_terms: D000577:Amides / Q000627:therapeutic use*; D000698:Analgesia / Q000379:methods*; D000779:Anesthetics, Local / Q000627:therapeutic use*; D002111:Calcaneus / Q000601:surgery*; D002404:Catheterization; D006801:Humans; D009407:Nerve Block; D010147:Pain Measurement; D010149:Postoperative Pain / Q000188:drug therapy*; D017060:Patient Satisfaction; D011446:Prospective Studies; D000077212:Ropivacaine; D013979:Tibial Nerve / Q000187:drug effects
chemical_list: D000577:Amides; D000779:Anesthetics, Local; D000077212:Ropivacaine