This study aimed to investigate the effect of the bevel orientation (facing upwards or downwards towards the skin) of the needle inserted into the arterial limb of the arteriovenous fistula (AVF) on puncture pain and postremoval bleeding time.Methods: This study, using a single-blind crossover design, was conducted on 35 maintenance hemodialysis patients who had been dialyzed for at least 6 months and in whom blood access was via an AVF. AVF cannulation was performed with the needle bevel pointing upward in the first six sessions and the needle bevel pointing downwards (towards the skin) in the subsequent six sessions. Needles were always inserted in the direction of blood flow. At each dialysis session, cannulation pain was measured using a visual analog scale (VAS), and the bleeding time at the end of dialysis after needle removal was recorded. Findings:The VAS score and postremoval bleeding time were lower when the needle bevel pointed downwards towards the skin during insertion (P < 0.05).Discussion: Insertion of the needle with the bevel pointed downward decreased puncture pain during cannulation and bleeding time postdialysis on needle removal.

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The limited data on post-operative analgesia management after laparoscopic cholecystectomy in the paediatric population make it difficult for clinicians to manage pain in this group. Administration of a modified thoracoabdominal nerve block through a perichondrial approach (M-TAPA) has recently been identified as a technique providing effective analgesia on the anterior and lateral thoracoabdominal wall. Unlike thoracoabdominal nerve block through the perichondrial approach block, the local anaesthetic (LA) with M-TAPA block provides effective post-operative analgesia in abdominal surgery by affecting T5-T12 dermatomes, just like when applied to the lower part of the perichondrium. As far as we know, all patients in previous case reports were adults, and we did not come across any study on the effectiveness of M-TAPA in paediatric patients. We present our case who did not need any additional analgesic during the post-operative 24 h after an M-TAPA block was administered before paediatric laparoscopic cholecystectomy.