The combined Pecs I and II block is a simple, easy-to-learn technique that produces good analgesia for radical breast surgery.

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Objective The aim of this randomized controlled trial was to evaluate U/S guided serratus anterior plane catheter block (SAPB) versus patient‐controlled analgesia (PCA) on the emergence of post‐thoracotomy pain syndrome (PTPS) after thoracotomies for thoracic tumours. Methods This trial included 89 patients with chest malignancies, scheduled for thoracotomy were randomly allocated into two groups: Group A "PCA–group N=44" receiving patient‐controlled analgesia and group B "SAPB group N=45" where analgesia was provided by SAPB. The primary outcome measure was the assessment for the possible emergence of PTPS at 12 weeks. The secondary outcome measures were pain relief measured using visual analog scale (VAS) score, Quality of life was assessed using Flanagan Quality of Life Scale (QOLS) and Activity level was assessed using Barthel Activity of daily living (ADL) score. Results At week 8, PTPS incidence was significantly (p = .037) higher in the PCA group (45%) than in the SAPB group (24%) with a relative risk of 1.38 and 95% CI (1.01–1.9) while the incidence of PTPS at week 12 was significantly (p = .035) higher in the PCA group (43%) than in the SAPB group (22%) with a relative risk of 2.38 and 95% CI (1.23–4.57). The need for pain therapy in PTPS patients was significantly lower in the SAPB group (17.7%) than the PCA group (38.6%) (p = .028) at week 12. Pain intensity: VAS‐R and VAS‐D (pain scores at rest and with activity, respectively) was comparable (p > .05) between both groups at 6, 12, 18 and 24 hr, however VAS was significantly higher in the PCA group at week 8 (p = .046) and week 12 (p = .032) . Both groups were comparable regarding ADL and QOL scores (p > .05). Conclusion Serratus anterior plane block is assumed to be a good alternative for post‐thoracotomy analgesia following thoracotomies. The current work hypothesized that SAPB for a week postoperatively, may reduce the emergence of PTPS and may reduce the demand for pain therapy in those patients. Significance statement The current work hypothesized that SAPB for a week postoperatively, is a good loco‐regional alternative for post‐thoracotomy analgesia following thoracotomies for chest malignancies, it may reduce the emergence of PTPS and the demand for pain therapy in these patients.

PNI is more effective than SNB for ISP.

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