500 Physiotherapy Mcqs | Most Repeated | DHA | MOH | DOH | OMSB | SCFHS | NHRA other prometric exams

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EXPLANATION OF MCQS

MCQ41: Answer: B. Gate control pain modulation

Explanation: Conventional TENS stimulates A-beta fibers, which inhibit pain transmission at the dorsal horn via the gate control theory.

MCQ42: Answer: C. 50–100 Hz

Explanation: Conventional TENS uses high frequency (50–100 Hz) with low intensity for acute pain relief.

MCQ43: Answer: B. Faradic current

Explanation: Faradic current is used for stimulating innervated muscles for strengthening and re-education.

MCQ44: Answer: B. Denervated muscle stimulation

Explanation: IDC with long pulse duration is required to stimulate denervated muscles.
In this video we’ll walk you through:

MCQ45: Answer: C. Malignancy

Explanation: Ultrasound increases tissue metabolism and blood flow, which may promote tumor growth.

MCQ46: Answer: B. Pulsed mode

Explanation: Pulsed ultrasound minimizes thermal effects and is safer in acute inflammatory conditions.

MCQ47: Answer: C. Deep heating via electromagnetic waves

Explanation: SWD produces deep heating using high-frequency electromagnetic energy.

MCQ48: Answer: C. 11 meters

Explanation: Standard SWD operates at 27.12 MHz frequency, corresponding to approximately 11 meters wavelength.

MCQ49: Answer: A. Deliver medication through skin using DC

Explanation: Iontophoresis uses direct current to push ionic medication through the skin.

MCQ50: Answer: B. Frostbite

Explanation: Excessive or prolonged cold application can cause tissue damage and frostbite.

MCQ51: Answer: B. Pulsed ultrasound

Explanation: In acute conditions, pulsed ultrasound is preferred because it provides non-thermal effects that promote healing without increasing inflammation.

MCQ52: Answer: B. Faradic stimulation

Explanation: Since the muscle is innervated, faradic current is appropriate for muscle re-education and strengthening.

MCQ53: Answer: B. High frequency, low intensity

Explanation: Conventional TENS (50–100 Hz) at low intensity provides pain relief via gate control mechanism without causing visible contraction.

MCQ54: Answer: C. Interrupted DC (long duration pulse)

Explanation: Denervated muscles require long pulse duration stimulation like interrupted DC.

MCQ55: Answer: C. Short Wave Diathermy

Explanation: SWD is contraindicated in patients with metal implants due to risk of excessive heating and burns.

MCQ56: Answer: B. Continuous ultrasound

Explanation: Continuous mode produces thermal effects useful in subacute or chronic conditions.

MCQ57: Answer: B. TENS

Explanation: TENS is effective for neuropathic pain management.

MCQ58: Answer: B. Iontophoresis

Explanation: Iontophoresis uses direct current to deliver ionic medications through the skin.

MCQ59: Answer: B. 1 MHz, continuous mode, 1–1.5 W/cm²

Explanation:
1 MHz penetrates deeper tissues (up to ~5 cm).
Continuous mode produces thermal effects.
1–1.5 W/cm² is appropriate for chronic conditions requiring heating.
3 MHz is for superficial tissues (1–2 cm depth).

MCQ60: Answer: C. Risk of thermal burn due to impaired sensation

Explanation:
In patients with sensory impairment (e.g., diabetic neuropathy), thermal modalities like hot packs and continuous ultrasound increase the risk of burns because the patient may not perceive excessive heat.



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