Monday, January 11, 2016

Orthopedic Diagnostic Testing

When reviewing medical records, I like to have a handy sheet remind me of the reason for the orthopedic tests that that are not intuitive as they often are named after a person.  Below are some of the common ones that I see in records for musculoskeletal examinations: 

 

Neck:

Adson Test
 
The arm being tested is held in a dependent position while the head is rotated from side to side. The test is positive for thoracic outlet syndrome if there is an obliteration of the radial pulse.
 
Allen's Test
While the patient raises one arm and makes a fist the examiner compresses the radial and ulnar arteries. Once the arm is lowered and the hand opened, the examiner releases one of the arteries then repeated releasing the other artery. If there is no flushing of the hand upon release of one of the arteries, the test is positive indicating a vascular occlusion of the released artery.
Compression Test
 
The examiner places their hands on the top of the patient's head and presses down causing a narrowing of the neural foramen. The test is positive if increased pain is noted and indicates nerve root irritation.
Spurling Test
 
Patient is asked to look up, turn the neck to one side while gentle downward pressure is applied to the head. The test is positive indicating a pinched cervical nerve when the patient reports pain and tingling.

 

Back:

Bragard Sign
The lower extremity is flexed at the hip with the knee stiff until the patient experiences pain then the foot is dorsiflexed. Increased pain is a positive sign indicating nerve involvement.
 
Heel and Toe Walk Test
The patient walks on their heels indicating L4-L5 nerve root irritation if they are unable to perform this activity. If unable to walk on their toes this indicates lumbar nerve root irritation.
 
Lasegue Sign
The patient is able to flex the hip with the knee bent without experiencing pain. The examiner then raises the straightened leg by the heel. The test is positive if there is pain indicating nerve root irritation.
 
Patrick Test
A test to distinguish sciatica from lumbosacral or hip pain. With the patient lying supine, the examiner places the ankle of the affected side over the patella of the opposite leg and pressure is placed on the flexed knee. Patients with sciatica will not experience pain while those with lumbosacral or hip disorders will.
 
 
Straight Leg Raising Test
Patient lifts leg with the knee remaining straight, a positive test will result in pain along the sciatic nerve suggesting nerve root irritation.
 
Waddell Test
Five or more tests for malingering in patients complaining of back pain. The tests include tenderness, simulation (axial loading and rotation), straight leg raising, regional disturbances (weakness or sensory disturbances) and overreaction. The Waddell test is positive if the patient has positive results and complains of pain in three or more of the five tests, suggesting the complaints are non-organic.

 

Shoulders:

Apprehension Test
The patient's arm is extended, held abducted and externally rotated. The patient will be apprehensive in a positive exam, motion will be painful to patients with anterior subluxing or dislocating shoulder.
 
Drop Arm Test
The arm is lifted to a fully abducted position then lowers the arm slowly towards their side. The test is indicative of a rotor cuff tear if the patient cannot actively control lowering the arm past 90 degrees.
 
Impingement Test
The examiner forcefully abducts and internally rotates the shoulder causing the greater tuberosity of the humerus to impinge the undersurface of the acromion. A positive test could indicate an impingement syndrome or rotator cuff tendonitis.

 Hands:

Finkelstein Sign
The thumb is folded into the palm of the hand and fingers are closed around it while the wrist is gently pushed down. The test is positive when there is pain in the thumb side of the wrist. Pain indicates synovitis of the abductor pollicis longus tendon to the wrist also known as DeQuervain's Tenosynovitis.
 
Phalen's Test
The wrist is flexed as far as it will go and held for one minute which compresses the median nerve that runs through the carpal tunnel at the wrist. The test is positive for carpal tunnel syndrome if the patient experiences paresthesia or pain.
 
Tinel's Sign
The test suggests positive findings for carpal tunnel syndrome when the patient reports tingling sensation when the examiner taps the area over the median nerve.

 Hips:

Ely Test
With the patient lying prone, the examiner flexes the leg on the thigh, bringing the heel towards the buttocks. The test is positive if the pelvis is arched away from the table, indicating tightness of the rectus femoris, contracture of the lateral fascia of the thigh, or femoral nerve irritation.
 
Thomas Sign
With the patient supine and flexing the opposite hip, the affected hip will rise from the table. If this occurs, the test is positive indicating hip joint flexion contracture.
 
Trendelenburg Test
The examiner stands behind the patient while they lift one leg then the other. If the pelvis drops downward on the non-weight bearing side the test is positive suggesting muscle weakness of the weight-bearing hip.

 

 

Knees:

 

Apley Test
While prone the patient compresses their knee at 90 degrees, the examiner rotates the tibia in both directions. The test is repeated with the knee joint under distraction (pulling the patient's foot upward). If the patient experiences pain on compression, the test indicates a meniscal injury; pain upon distraction suggests a ligamentous injury.
 
Drawer Sign
With the patient supine and knee flexed 90 degrees, the proximal tibia is pulled anteriorly and then pushed posteriorly. Excessive movement while being pulled suggests a torn anterior cruciate ligament. Excessive movement while being pushed suggests a torn posterior cruciate ligament.
 
Lachman Test
This test is performed with the patient supine and the knee flexed to 20 degrees. The examiner pulls the tibia anteriorly. A torn anterior cruciate ligament is indicated by a "give" reaction.
 
McMurray's Test
The patient is supine. The examiner rotates the foot outward and slowly extends the knee from a fully flexed position. The test is repeated but with the foot rotated inward. The test is positive if a "clicking" is noted while extending the knee. A "click" with the foot rotated outward indicates a tear of the medial meniscus, while a "click" with the foot rotated inward indicates a lateral meniscus tear.
 
Pivot Shift Test
This test is for a torn anterior cruciate ligament. The examiner internally rotates the leg with the knee fully extended. With valgus stress, the knee is gradually flexed. The test is positive if the knee shifts at 30 to 40 degrees.
 
Slocum Test
This test is for rotatory instability of the knee. The patient is supine with the knee flexed 90 degrees, and the foot internally rotated. The examiner sits on the patient's foot and pulls the proximal tibia anteriorly. This test is repeated with the foot externally rotated. Excessive motion of the joint indicates a rotatory instability of the knee.

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