Thermal injury from forced-air warmer device precipitated by massive extravasation from peripheral venous cannula.

Extravasation injury (EVI) is an iatrogenic complication of venous cannulation. Usually innocuous but occasionally it engenders sequelae. Its severity is determined by various physicochemical properties of infusate. A 50-year-old patient developed leg EVI from crystalloids infused through a pressurized digital infuser (PDI), likely from cannula tip displacement during positioning for craniotomy. We ignored checking gravity-aided free-fluids flow before switching on PDI. Following surgery, the patient had an edematous leg with bullae and epidermal peelings from severe extravasation and burns, respectively. Doppler revealed patent leg arteries. Therefore, EVI was conservatively managed, with complete recovery. Apparently, increased local tissue pressure from extravasation produced conditions of peripheral circulation sufficiency predisposing the leg to thermal injury from the forced-air warmer. On inspecting PDI postoperatively, its upper-pressure alarm limit was 300 mmHg, which prevented it from sounding alarm during extravasation.

Right cerebellar stroke with a right vertebral artery occlusion following an embolization of the right glomus tympanicum tumor: Case report with literature review.

A 35-year-old female presented with episodes of frequent dizziness, ear fullness, and right ear tinnitus for 12 months. Head imaging revealed a right glomus tympanicum tumor. She underwent pre-operative endovascular embolization of the glomus tympanicum tumor with surgical, cyanoacrylate-based glue. Immediately after the procedure, she developed drowsiness and severe pain in the right temporal region. Further investigations revealed a right cerebellar stroke in the posterior inferior cerebellar artery territory. She was treated with intravenous heparin, followed by one year of oral anticoagulation. With rehabilitation, she significantly recovered from her post embolization stroke. However, the tumor was resected at another institution. Ten years later, follow-up imaging indicated a gradual increase in the size of the glomus jugulare tumor compressing the nearby critical vascular structures. She subsequently received radiation therapy to treat the residual tumor. Currently, she has no neurological deficit, but her mild dizziness, right ear tinnitus, and hearing impairment persist.

How Reliable Is the Intraoperative Computed Tomography Angiography in Assessing Complete Surgical Resection of Cerebral Arteriovenous Malformations?

BACKGROUND: Digital subtraction angiography (DSA) is still considered the gold standard test to evaluate arteriovenous malformation's (AVM) residual after microsurgical resection. OBJECTIVE: To evaluate the safety and reliability of intraoperative computed tomography angiography (iCTA) as an immediate method of evaluating the surgical results of AVM resection. METHODS: We performed a retrospective review for all cases of cerebral AVMs at our institute from January 2015 to April 2020 who underwent surgical resection of cerebral AVM and had iCTA. All included patients underwent a postoperative DSA, and the results were compared with iCTA. RESULTS: Twenty-eight cases were included. All cases showed complete resection (100%) in the iCTA, and the results were consistent with the postoperative DSA results. The sensitivity of iCTA was 100%. The added operative time ranged from 25 to 30 min. There were no complications related to the use of iCTA. CONCLUSION: Intraoperative assessment of AVMs surgical results with an iCTA is safe and reliable. The sensitivity of iCTA following AVM resection merits further investigations.