Dr. Kevin Yip

Dr Kevin Yip
Orthopaedic Surgeon
MBBS(UK), FRCS(EDIN), FAM(SING), FHKCOS(ORTHO)

Featured on Channel NewsAsia

Subtrochanteric Fracture

Basics Description By definition, subtrochanteric hip fractures (or, simply, subtrochanteric fractures) extend into the region between the lesser trochanter and a point 5 cm distally. Classification: Multiple systems exist, but prognostically the most critical factor is fracture stability, which is based on the degrees of comminution of the medial and posteromedial cortex. The Russell […]

Stress Fracture

Basics Description A stress (microscopic) fracture occurs when: Repetitive stresses are applied to a bone faster than it is able to remodel to withstand this challenge. As the stressing force continues, the bone gradually fatigues and eventually breaks. Remodeling occurs in response to the stress but does not happen quickly enough to prevent the […]

Sternoclavicular Joint Disloclation

Basics Description The medial end of the clavicle dislocates from its articulation with the sternum. Dislocations may be anterior or posterior. Posterior dislocations: May cause neurovascular or respiratory compromise. Posterior reductions: Must be reduced. Anterior dislocations often are unstable, even if reduced, but few functional deficits occur with this instability. Epidemiology Rare injury: 1% […]

Sprengel Deformity

Basics Description Sprengel deformity: Congenital elevation of the scapula Small scapula with restricted ROM Often, congenital anomalies coexist. This condition: Is present from birth May be discovered at birth or after the child starts to use the arms Usually is diagnosed within the 1st few years of life Surgery is best performed in patients […]

Sprains

Basics Description Sprains refer to damaged ligaments, and they are the result of overstretching of the tissues. Injuries to the ligamentous structures of movable joints are among the most common complaints seen in primary care medicine, as well as in the subspecialty areas of orthopaedic surgery. Sprains can occur in any movable joint. Classification: […]

Spondylolisthesis

Basics Description Spondylolisthesis is an abnormal AP translation of 2 vertebral bodies relative to each other. This translation is secondary to a defect in the pars interarticularis (spondylolysis) or the posterior ligamentous-bony restraints. Spondylolisthesis is classified by type (Table 1) and by the severity of the slip (Table 2). General Prevention No preventive measures […]

Spinal Stenosis

Basics Description Compression of neural elements secondary to osteoarthritic changes (bone spurs, hypertrophied ligamentum flavum, disc space narrowing) at intervertebral levels and facet joints Characterized by back and/or lower extremity pain, numbness, weakness, and possible bladder/bowel dysfunction. General Prevention No known preventive measures Epidemiology Symptoms develop during the 5th and 6th decades. No gender […]

Spina Bifida

Basics Description Incomplete closure of the laminar arches of the spine Occurs at birth but may not be detected until later An unrelated variety, spina bifida occulta, is a small defect in the 5th lumbar or 1st sacral arches, a benign finding of no clinical consequence. May be a clinically significant problem if it […]

Soft-Tissue Tumors

Basics Description Soft-tissue tumors may occur in any area of the skeleton and in individuals of any age. They may comprise fibrous tissue or tissue originating from muscle, fat, vessels, or nerves. Reactive lesions also cause soft-tissue tumors. Benign tumors far outnumber malignant ones. Differentiating the malignant from the benign can be difficult. Staging: […]

Snapping Hip

Basics Description Snapping of the hip is a sensation that is normally felt on an infrequent basis by many people. If it becomes frequent or painful, patients may seek attention and treatment. The causes may include structures outside or inside the joint. Synonyms: Popping hip; Tendinitis; Coxa saltans General Prevention Perform adequate stretching before […]