Articles: nerve-block.
-
Complications of peribulbar anaesthesia include retrobulbar haemorrhage, globe perforation and brainstem anaesthesia. Therefore, this study took measurements relating the proximity of medial canthus to the optic nerve and also the safe angle between orbit and globe using 200 multiplanar reconstructed computed tomography (CT) images of the orbit. The principal results show that in 1.5% of the sample, the optic nerve is within 20 mm of the medial canthus, with a minimum distance of 15 mm. ⋯ We have shown that there are a minority of patients with unusual orbital anatomy. This places them at a theoretical higher risk of complications. These cases are not currently predicted by measured data.
-
Randomized Controlled Trial
Use of ultrasound guided single shot costotransverse block (intertransverse process) in breast cancer surgery: a prospective, randomized, assessor blinded, controlled clinical trial.
Ultrasound guided costotransverse block (CTB) is a relatively new "peri-paravertebral" block that has been described recently. It has been previously reported that CTB, administered with a single high-volume injection, provides effective analgesia in breast conserving surgery. In this study we evaluated the effect of CTB when used in breast cancer surgery. ⋯ Ultrasound guided CTB improves analgesia quality in breast cancer surgery.
-
Case Reports
Transient C5 Sensory and Motor Blockade After a Unilateral T4 Paravertebral Block: A Case Report.
A thoracic paravertebral block (TPVB) can provide anesthesia for breast cancer surgeries. This case report describes a 58-year-old woman with a prolonged ipsilateral dense C5 dermatomal sensory and motor blockade after receiving a TPVB at T4 with 40 mL of 0.2% ropivacaine for a left total mastectomy, suggesting a high cephalad spread of anesthesia up to C5 paravertebral spaces. The lower extremities and the diaphragm were not involved. It is possible that the large volume of local anesthetic, even at low concentration, combined with her previous neural pathology and surgical laminectomy resulted in unexpected postoperative neurological changes.