Which position should be avoided after total hip arthroplasty using an anterior approach?

Correct Answer: A

Rationale: The correct answer is A: Bridging. After total hip arthroplasty using an anterior approach, bridging should be avoided to prevent excessive stress on the hip joint. Bridging involves lifting the pelvis off the ground while lying on the back, which can strain the hip joint and potentially lead to dislocation. Adduction crossing midline can also stress the hip joint. Sitting on a regular toilet seat and crossing legs are acceptable postures as long as proper precautions are taken to avoid excessive hip flexion or internal rotation.

Correct Answer: A

Rationale: The correct answer is A: Intercostobrachial nerve. During a mastectomy, the intercostobrachial nerve is often damaged, leading to postmastectomy pain syndrome. This nerve runs along the chest and upper arm, making it susceptible to injury during the surgery. The suprascapular nerve (B) innervates the shoulder joint, the musculocutaneous nerve (C) innervates the muscles of the anterior arm, and the axillary nerve (D) innervates the deltoid and teres minor muscles, none of which are directly affected during a mastectomy. Thus, these choices are incorrect.

Correct Answer: D

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Correct Answer: A

Rationale: The correct answer is A: Marked wrist and finger drop. In Saturday night palsy, there is compression of the radial nerve, leading to weakness of the wrist and finger extensors. This results in the characteristic presentation of wrist and finger drop. Choice B is incorrect as atrophy of the APB is seen in carpal tunnel syndrome. Choice C is incorrect as weak elbow extension is not a typical finding in Saturday night palsy. Choice D is incorrect as painless weakness and atrophy of hand intrinsic muscles are more indicative of ulnar nerve compression.

Correct Answer: D

Rationale: The correct answer is D because diplopia with one eye covered suggests a problem with the affected eye itself, such as an irregularity in the cornea or lens causing refractive errors. Weakness of CN III (A) would cause eye movement issues, not diplopia with one eye covered. Weakness of CN IV (B) would result in vertical diplopia, not diplopia with one eye covered. A lesion of the brainstem (C) can lead to various oculomotor issues but wouldn't specifically cause diplopia with one eye covered.