INTRODUCTION Multicompartmental blocks are commonly described in epidurals but not spinals. We describe a case of subarachnoid block performed in an obese patient which resulted in a clinical presentation resembling that of a subdural block. CLINICAL PICTURE A 29-year-old woman, scheduled for saucerisation of thigh carbuncle, was administered 2.1 mL of hyperbaric bupivacaine. The spinal resul...

Stability is achieved in most approximate Riemann solvers through ‘flux upwinding’, where the flux at the interface is arrived at by adding a dissipative term to the average of the left and right flux. Motivated by the existence of a collapsed interface state in the gas-kinetic Bhatnagar–Gross–Krook (BGK) method, an alternative approach to upwinding is attempted here; an interface state is arri...

In this paper we are going to study the gas evolution dynamics of the exact and approximate Riemann solvers, e.g., the Flux Vector Splitting (FVS) and the Flux Difference Splitting (FDS) schemes. Since the FVS scheme and the Kinetic Flux Vector Splitting (KFVS) scheme have the same physical mechanism and similar flux function, based on the analysis of the discretized KFVS scheme the weakness an...

The AUFS-scheme by Sun and Takayama is a flux splitting scheme without breakdown of discrete shock profiles, usually called carbuncle, but still with a fine resolution of entropy waves. Unfortunately, in numerical tests, the viscosity on entropy waves turns out to be too small and the viscosity on shear waves to be too high. In this paper, we provide fixes to overcome these deficiencies.

Venkatesan R, et al. BMJ Case Rep 2017. doi:10.1136/bcr-2017-220628 Description A 65-year-old man presented with fever and painful swelling at the back for last 2 weeks. His prior history was significant for long-standing type 2 diabetes of 20 years duration and systemic hypertension. Clinical examination showed red, swollen, painful carbuncle with gangrenous patch at the centre and multiple pu...