Medical Emergencies · patient case question
Which laboratory value is of the MOST immediate concern for dental treatment?
Patient case: HIV with poorly controlled diabetes
Patient: Male, 47 years old
Chief complaint: “My gums bleed and my mouth is always dry.”
History: HIV, on antiretroviral therapy, CD4 460 cells/mm³, viral load undetectable. Type 2 diabetes mellitus. Asthma, well controlled with an as-needed inhaler.
Findings: Laboratory results today: HbA1c 10%, CD4 460, undetectable viral load, haemoglobin 13.4 g/dL, platelets 210,000. Generalised bleeding on probing with 4–5 mm pockets.
Show answer and explanation
Correct answer: D. The HbA1c of 10%
- A. A platelet count of 210,000 sits comfortably in the normal 150,000 to 450,000 range and poses no bleeding risk.
- B. An undetectable viral load is the treatment GOAL, indicating effective antiretroviral therapy and minimal transmission risk. It is reassuring, not concerning.
- C. A CD4 count of 460 is close to the normal range of 500 to 1500 and well above the threshold of 200 that defines significant immunosuppression. This patient's HIV is doing considerably better than his diabetes.
- D. CORRECT. An HbA1c of 10 percent corresponds to an average blood glucose around 240 mg/dL and represents SEVERELY UNCONTROLLED diabetes. The dental consequences are immediate and concrete: impaired neutrophil function and microvascular disease mean higher infection risk and delayed healing, worse periodontal response, and a real risk of intra-operative hyperglycaemic or hypoglycaemic events. Elective surgery is deferred pending medical optimisation — generally an HbA1c under 7 to 8 percent.
Note: The teaching point of this item is that a well-controlled chronic infection is less dangerous than a badly controlled metabolic disease. Do not be distracted by the HIV label.
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