Pre‑operative Screening for Hepatitis B, C, and HIV in Pakistan
Direct Recommendation
In Pakistan—a region with high hepatitis B and C prevalence—all patients scheduled for major surgery (abdominal, orthopedic, gynecological, trauma, burns, vascular, and open‑heart procedures) should receive risk‑based pre‑operative screening for hepatitis B surface antigen, anti‑hepatitis C antibody, and HIV antibody/antigen after obtaining informed consent and counseling, while universal precautions must be applied to every surgical case regardless of screening results. 1, 2
Rationale: Pakistan's High Hepatitis Burden
- Pakistan has intermediate‑to‑high prevalence of hepatitis B (1.6–2.5%) and very high prevalence of hepatitis C (6.2–7.5%), with 19,000 HCV‑related deaths and 545,000 new HCV cases annually. 3, 4, 5
- A 2012 study of pre‑operative cataract patients in Karachi found 2.1% HBsAg‑positive and 11.1% anti‑HCV‑positive, demonstrating substantial undiagnosed infection in surgical populations. 6
- In high‑prevalence regions, all patients admitted for emergency surgery should be regarded as high‑risk and offered pre‑operative screening. 1, 2
Who to Screen: Risk‑Based Approach
Mandatory Screening Contexts
- All patients undergoing major abdominal, orthopedic, gynecological, trauma, burn, fracture, or vascular surgery in Pakistan should be screened. 1, 2
- All patients scheduled for open‑heart surgery should be screened because of substantial blood‑exposure risk to operating‑room staff. 1, 2
- Organ‑transplant donors and individuals donating blood, sperm, or breast milk require mandatory HIV and hepatitis testing per Department of Health regulations. 1, 2
Risk‑Factor History as Primary Screening Tool
- A thorough pre‑operative interview should identify patients with the following risk factors for hepatitis B, C, and HIV:
- Birth in a high‑prevalence region (Pakistan qualifies) 1, 2
- Intravenous drug use 1, 2
- Multiple sexual partners or men who have sex with men 1, 2
- Prior blood transfusion or receipt of unscreened blood products 1, 2
- Household or sexual contact with a known hepatitis or HIV‑positive individual 1, 2
- History of medical injections (a major HCV risk factor in Pakistan, accounting for 38% of HCV exposure) 5
- Traditional barber shaving or tattooing 5
- Hemophilia patients who received untreated blood 1, 2
- Children born to seropositive mothers 1, 2
Laboratory Testing and Consent
HIV Testing
- HIV antibody/antigen testing must be preceded by counseling and requires informed consent from the patient. 1, 2
- HIV testing should be performed only when clinical risk factors are present, not as routine universal screening. 1, 2
Hepatitis B Testing
- Screen for hepatitis B surface antigen (HBsAg) in all high‑risk patients undergoing major surgery. 1, 2
- Pakistan Society for the Study of Liver Diseases guidelines recommend treatment for chronic HBV if ALT is persistently elevated and HBV DNA >2000 IU/mL, or if cirrhosis is present regardless of ALT. 3
Hepatitis C Testing
- Screen for anti‑HCV antibody using the same risk‑based criteria as HIV, given overlapping high‑risk populations. 1
- Be aware that rapid immunochromatographic test (ICT) devices for HBV and HCV available in Pakistan have variable sensitivity (62–80%) and specificity (66–90%); chemiluminescence immunoassay (CLIA) and PCR are more reliable. 7
- Only 22% of HCV cases in Pakistan have been diagnosed and only 2% have received treatment, despite 96% treatment response rates. 4
Management of Positive Results
Hepatitis B
- Patients with HBsAg‑positive results should undergo further evaluation including HBV DNA, ALT, and assessment for cirrhosis. 3
- Initiate antiviral therapy (lamivudine, adefovir, telbivudine, entecavir, or interferon) if HBV DNA >2000 IU/mL with elevated ALT, or if cirrhosis is present regardless of ALT. 3
- Vaccinate all surgical staff against hepatitis B; those with post‑vaccination anti‑HBs >100 IU should receive a booster every 3–5 years. 2
Hepatitis C
- Refer HCV‑positive patients for antiviral treatment; same‑day testing and treatment reduces dropout rates and improves the cascade of care. 4
- Decentralization and task shifting are important tools to improve service delivery and reach communities in Pakistan. 4
HIV
- Early detection of asymptomatic HIV infection allows prompt initiation of antiretroviral therapy and prophylaxis against opportunistic infections, improving peri‑operative outcomes. 2
- Knowing a patient's HIV status does not reduce sharps injuries when universal precautions are consistently applied, so infection control relies on universal precautions, not screening alone. 1, 2
Universal Precautions: The Foundation of Infection Control
Universal precautions must be applied to every surgical case regardless of screening results and are the primary method of preventing occupational transmission. 1, 2
Standard Measures for All Cases
- Vaccinate all surgical staff against hepatitis B. 1, 2
- Cover any cuts or abrasions on staff with waterproof dressings. 1, 2
- Protect eyes, mouth, and nose with goggles or face shields to avoid blood splashes. 2
- Prohibit hand‑to‑hand passing of sharps, finger‑guiding of needles, and resheathing of needles. 1, 2
- Dispose of all sharps immediately into approved puncture‑proof containers. 1, 2
- Perform routine hand‑washing and basic hygiene before and after every case. 1, 2
Additional Precautions for Known or High‑Risk Cases
- Use double gloving for procedures with high blood exposure, though this may reduce tactile sensitivity. 8, 1, 2
- Wear plastic aprons and disposable gloves when handling contaminated instruments, dressings, and linen. 8, 1
- Disinfect the operating‑theatre floor with hypochlorite solution (1000 ppm available chlorine) between high‑risk cases. 1
Key Pitfalls and Caveats
- Do not rely on rapid ICT devices alone for diagnosis in Pakistan; confirm positive results with CLIA or PCR because rapid tests have suboptimal sensitivity and specificity. 7
- Do not perform HIV testing without counseling and informed consent; this is both an ethical and legal requirement. 1, 2
- Do not assume that knowing a patient's serostatus will prevent sharps injuries; universal precautions are the primary protective measure. 1, 2
- Do not neglect to ask about medical injections and traditional barber shaving in the pre‑operative history, as these are major HCV risk factors in Pakistan. 5
- Do not delay antiviral treatment for HCV‑positive patients; same‑day testing and treatment improves outcomes and reduces loss to follow‑up. 4