Introduction: Spinal anesthesia (SA) is one of the most frequently applied anesthesia procedures today. However, SA failure rate varies between 1 and 17%. The age of the patient, the position at which the procedure is performed, or the characteristics of the technical operation can affect success. In this study, we aimed to compare the most frequent SA failures according to the types of surgery and causes of failure. The results of SA procedures performed in a Hospital were comparing to those published in the current literature.

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Meralgia paresthetica characterised by pain, tingling and numbness in lateral aspect of thigh. A 48 year-old male with 2 years history of left lateral thigh paresthesias and burning pain consistent with meralgia paresthetica was referred to our clinic after failing trials of physical therapy, nonsteroidal anti-inflammatories and neuropathic medications. We performed lateral femoral cutaneous nerve block with corticosteroid, after that patient had good relief for 2 months; however, block provided only temporary relief and patient again started feeling same pain. As this pain was limiting the patient's ability to perform his functions as truck driver, we planned to perform a pulsed radiofrequency treatment of the lateral femoral cutaneous nerve left side under ultrasound guidance. After locating the lateral femoral cutaneous nerve with ultrasound and reproducing the patient's dysesthesia with stimulation, pulsed radiofrequency treatment was performed at 42°C for 120 seconds. The needle was then rotated 180° and an additional cycle of pulsed radiofrequency treatment was performed followed by injection of 0.125 % bupivacaine with 20 mg triamcinolone. At 2 and 4 month follow-up visits, the patient reported excellent pain relief with activity and improved ability to perform his duties. We have also described various aetiologies for meralgia paresthetica and multiple modalities available for the treatment of meralgia paresthetica.

The Tetralogy Fallot was one of the commonest Right to Left shunting disease in the children. TOF is most common in association with brain abscess (13-70%). This case is of a 3 year old child who had tetralogy of Fallot (uncorrected) and was to be taken for drainage of Fronto-Parietal sub dural abscess via Burr hole. The abscess was drained and patient was shifted with inotropes and ventilator support. In next 24 hours patient improved and supports were gradually withdrawn.