Indications: Skin incision: Begin the incision just posterior to the lateral epicondyle and lateral to the triceps tendon, and continue the incision distally to the lateral tip of the olecranon and then down the subcutaneous border of the ulna to the junction of its proximal and middle thirds or as…
Tag: Orthopedics
Section Editor: Dr. Sulabh Kumar Shrestha, MBBS, PGY1 Orthopedics
PGMEE, MRCS, USMLE, MBBS, MD/MS 
Sciatic Nerve Variations around Piriformis Muscle
Variations involving the relationship between the sciatic nerve and the piriformis muscle are commonly classified based on Beaton and Anson’s classification. Mnemonic: I Prefer Smart Anatomy For Perfect nerve-sparing Type Mnemonic Meaning Description Prevalence I I Inferior Undivided sciatic nerve passes below piriformis 87% II Prefer Piercing Peroneal pierces, tibial…
Surgical Skills 
Direct Lateral Approach to Radial Shaft
Position: Elbow flexed 90 degree and forearm in mid-prone Landmarks: Skin incision: Centered over fracture in a straight imaginary line joining lateral epicondyle of humerus and tip of radial styloid Superficial dissection: Subcutaneous tissue and deep fascia are incised along the line of skin incision Deep dissection: Interval is developed…
PGMEE, MRCS, USMLE, MBBS, MD/MS 
Iliac Cortical Density (ICD)
Synonym: Iliac Cortical Line Iliac cortical densities (ICD) are the overlap of the true pelvis posterior to the acetabulum which is used as a proxy for the slope of the sacral ala. Importance: The entry point should be anterior in S1 and inferior to the iliac cortical density (ICD), which…
PGMEE, MRCS, USMLE, MBBS, MD/MS 
Crowe Classification in Adult Hip Dysplasia
Crowe Classification Class I: <50% subluxation or proximal displacement <10% of pelvic height Class II: 50-75% subluxation or proximal displacement 10-15% of pelvic height Class III: 75-100% subluxation or proximal displacement 15-20% of pelvic height Class IV: >100% subluxation or proximal displacement >10% of pelvic height and deficient true acetabulum…
PGMEE, MRCS, USMLE, MBBS, MD/MS 
Coccyx Types
Postacchini and Massobrio Classification (Nathan Modification) Can be classified into 6 types: Type I (slight curve): Curved slightly forward with apex pointing caudally (>50% incidence) Type II (forward curve): More prominent ventral curvature with coccyx apex pointing anteriorly (8-32% incidence) Type III (sharp angle): Acute anterior angulation of coccyx but…
PGMEE, MRCS, USMLE, MBBS, MD/MS 
Morel Lavallee Lesion
Definition: Post-traumatic closed degloving injury, in which the skin and subcutaneous tissue is detached from the underlying fascia by a shearing force which can disrupt perforating vessels and nerves, creating a potential space that fills with blood, lymph, debris and fat (necrotic and/or viable). Clinical features: The diagnosis can be…
PGMEE, MRCS, USMLE, MBBS, MD/MS 
Corona Mortis
Synonym: Crown of Death Definition: Retropubic vascular anastomoses between the obturator and external iliac systems Location: Behind the superior pubic ramus at varying distance from the symphysis pubis (range 40-96 mm) Morphologies: a. Arterial corona mortis (8-65% incidence): b. Venous corona mortis (40-96% incidence): c. Combined arterial and venous corona…