Practice Test Geeks(CHT) Certified Hyperbaric Technician Practice Test
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CHT Wound Care & Hyperbaric Indications Flashcards

6 cards from real CHT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 6 CHT Wound Care & Hyperbaric Indications flashcards as text

  1. The primary mechanism by which HBOT stimulates angiogenesis in chronic wounds is:

    Answer: Cyclic hyperoxygenation followed by relative hypoxia upregulates VEGF and HIF-1α between sessions

    The contrast between high in-chamber PO2 and relative hypoxia between sessions creates a cycling effect that upregulates VEGF and HIF-1α, driving therapeutic angiogenesis.

  2. During an in-chamber TCOM oxygen challenge test, a periwound value rising above what level predicts a favorable HBOT response?

    Answer: 25 mmHg

    A periwound TCOM rising above 25 mmHg during an in-chamber oxygen challenge confirms the tissue can respond to increased oxygen delivery, predicting a favorable wound healing outcome.

  3. Which condition is NOT an approved UHMS indication for HBOT?

    Answer: Chronic low back pain

    Chronic low back pain is not a UHMS-approved indication for HBOT; approved conditions involve tissue hypoxia, gas bubble disorders, or anaerobic infections.

  4. The Marx protocol for mandibular osteoradionecrosis (ORN) calls for:

    Answer: 20 pre-operative and 20 post-operative HBOT sessions at 2.4 ATA

    The Marx protocol specifies 20 pre-operative and 20 post-operative hyperbaric oxygen sessions at 2.4 ATA for mandibular osteoradionecrosis requiring surgery.

  5. HBOT enhances antibiotic efficacy in infected hypoxic wounds primarily because:

    Answer: Elevated tissue PO2 restores neutrophil oxidative (respiratory burst) bactericidal activity

    Neutrophil oxidative killing requires adequate tissue oxygen; in hypoxic infected wounds, HBOT restores PO2, enabling effective immune-mediated bacterial destruction alongside antibiotics.

  6. The most critical predictor of HBOT success in diabetic foot wounds is:

    Answer: Adequate arterial inflow confirmed by pre-treatment TCOM or ankle-brachial index

    Adequate arterial inflow, confirmed by TCOM or ABI, is the most essential predictor of HBOT benefit — without sufficient perfusion, dissolved oxygen cannot reach wound tissue.