Arthroscopic procedures overview — MCQs

A 21-year-old man comes to the physician for a follow-up examination. Four days ago, he injured his right knee while playing soccer. Increased laxity of the right knee joint is noted when the knee is flexed to 30° and an abducting force is applied to the lower leg. The examination finding in this patient is most likely caused by damage to which of the following structures?

A surgeon is interested in studying how different surgical techniques impact the healing of tendon injuries. In particular, he will compare 3 different types of suture repairs biomechanically in order to determine the maximum load before failure of the tendon 2 weeks after repair. He collects data on maximum load for 90 different repaired tendons from an animal model. Thirty tendons were repaired using each of the different suture techniques. Which of the following statistical measures is most appropriate for analyzing the results of this study?

A 20-year-old man comes to the clinic complaining of shoulder pain for the past week. He is a pitcher for the baseball team at his university and reports that the pain started shortly after a game. The pain is described as achy and dull, intermittent, 7/10, and is concentrated around the right shoulder area. He denies any significant medical history, trauma, fever, recent illness, or sensory changes but endorses some difficulty lifting his right arm. A physical examination demonstrates mild tenderness of the right shoulder. When the patient is instructed to resist arm depression when holding his arms parallel to the floor with the thumbs pointing down, he reports significant pain of the right shoulder. Strength is 4/5 on the right and 5/5 on the left with abduction of the upper extremities. What nerve innervates the injured muscle in this patient?

A 63-year-old man presents to his family physician with limited movement in his left shoulder that has progressed gradually over the past 6 years. He previously had pain when moving his shoulder, but the pain subsided a year ago and now he experiences the inability to fully flex, abduct, and rotate his left arm. He had an injury to his left shoulder 10 years ago when he fell onto his arms and ‘stretched ligaments’. He did not seek medical care and managed the pain with NSAIDs and rest. He has diabetes mellitus that is well controlled with Metformin. His blood pressure is 130/80 mm Hg, the heart rate is 81/min, the respiratory rate is 15/min, and the temperature is 36.6°C (97.9°F). Physical examination reveals limitations of both active and passive abduction and external rotation in the left arm. The range of motion in the right glenohumeral joint is normal. The muscles of the left shoulder look less bulky than those of the right shoulder. There is no change in shoulder muscle power bilaterally. The reflexes and sensation on the upper extremities are normal. Which of the following is the next best step for this patient?

A 33-year-old man presents to his primary care physician for left-sided knee pain. The patient has a history of osteoarthritis but states that he has been unable to control his pain with escalating doses of ibuprofen and naproxen. His past medical history includes diabetes mellitus and hypertension. His temperature is 102.0°F (38.9°C), blood pressure is 167/108 mmHg, pulse is 100/min, respirations are 14/min, and oxygen saturation is 98% on room air. Physical exam reveals a warm and tender joint that is very tender to the touch and with passive range of motion. The patient declines a gait examination secondary to pain. Which of the following is the best next step in management?

Five days after undergoing right knee arthroplasty for osteoarthritis, a 68-year-old man has severe pain in his right knee preventing him from participating in physical therapy. On the third postoperative day when the dressing was changed, the surgical wound appeared to be intact, slightly swollen, and had a clear secretion. He has a history of diabetes, hyperlipidemia, and hypertension. Current medications include metformin, enalapril, and simvastatin. His temperature is 37.3°C (99.1°F), pulse is 94/min, and blood pressure is 130/88 mm Hg. His right knee is swollen, erythematous, and tender to palpation. There is pain on movement of the joint. The medial parapatellar skin incision appears superficially opened in its proximal and distal part with yellow-green discharge. There is blackening of the skin on both sides of the incision. Which of the following is the next best step in the management of this patient?

A 25-year-old man comes to the emergency department with right knee pain. He was playing soccer when an opposing player tackled him from the side and they both fell down. He immediately heard a popping sound and felt severe pain in his right knee that prevented him from standing or walking. On physical examination, his right knee is swollen and there is local tenderness, mostly at the medial aspect. External rotation of the right knee elicits a significant sharp pain with a locking sensation. Which of the following structures is most likely injured?

A 6-year-old boy presents to his primary care physician with hip pain that started this morning. The patient claims the pain is severe and is stopping him from skateboarding. The patient recently recovered from an upper respiratory infection that he caught from his siblings but has otherwise been healthy. The patient has a past medical history of obesity. His temperature is 98.1°F (36.7°C), blood pressure is 100/55 mmHg, pulse is 90/min, respirations are 22/min, and oxygen saturation is 98% on room air. On physical exam, you note an obese boy in no acute distress. Cardiopulmonary exam is within normal limits. Inspection of the hip reveals no abnormalities or swelling. The hip exhibits a normal range of motion and physical exam only elicits minor pain. The patient's gait appears normal and pain is elicited when the patient jumps or runs. Which of the following is the best next step in management for this patient's most likely diagnosis?

A 45-year-old male presents to his primary care provider with an abnormal gait. He was hospitalized one week prior for acute cholecystitis and underwent a laparoscopic cholecystectomy. He received post-operative antibiotics via intramuscular injection. He recovered well and he was discharged on post-operative day #3. However, since he started walking after the operation, he noticed a limp that has not improved. On exam, his left hip drops every time he raises his left foot to take a step. In which of the following locations did this patient likely receive the intramuscular injection?

A 25-year-old male wrestler presents to his primary care physician for knee pain. He was in a wrestling match yesterday when he was abruptly taken down. Since then, he has had pain in his left knee. The patient states that at times it feels as if his knee locks as he moves it. The patient has a past medical history of anabolic steroid abuse; however, he claims to no longer be using them. His current medications include NSAIDs as needed for minor injuries from participating in sports. On physical exam, you note medial joint tenderness of the patient’s left knee, as well as some erythema and bruising. The patient has an antalgic gait as you observe him walking. Passive range of motion reveals a subtle clicking of the joint. There is absent anterior displacement of the tibia relative to the femur on an anterior drawer test. The rest of the physical exam, including examination of the contralateral knee is within normal limits. Which of the following structures is most likely damaged in this patient?