Chapter 41

Point-of-Care Ultrasound for Human Immune-Deficiency Virus (HIV) and Tuberculosis (TB) Co-Infection

The FASH Scan

First published: 14 July 2017

Summary

New tuberculosis (TB) infections are surging in patients infected with the human immune-deficiency virus (HIV). The 2007 World Health Organization (WHO) guidelines for diagnosing TB in HIV-positive patients make point-of-care ultrasound ideally suitable for diagnosing the TB co-infection in smear-negative patients. TB sputum testing is the first step in diagnosing TB co-infection. HIV patients who test negatively on their TB sputum should continue with their diagnostic work-up aided by supplementary investigations. The FASH scan examination includes a key list of ultrasound. Imaging investigations (including the FASH scan) increase the likelihood of detecting the presence of extrapulmonary tuberculosis (EPTB) in patients who may be otherwise difficult to diagnose due to the low sputum TB testing yield. The FASH scan components have varying value in predicting the presence of EPTB. The FASH scan has the dual benefit of detecting EPTB and grossly predicting the severity of the patient's immune status suppression.

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