‘Z-effect’ and ‘Reverse Z-effect’ are complications relating to differential migration of screws that arise from fixation of unstable proximal femoral fractures with Proximal Femoral Nail (PFN) having 2 interlocking head screws. The 4 patterns of unstable intertrochanteric fracture hip are: Z-effect: The Z-effect involves the lateral migration of the lag…
Category: PGMEE, MRCS, USMLE, MBBS, MD/MS
Medical knowledge in bullet points with understandable language, simplified images and graspable mnemonics.
PGMEE, MRCS, USMLE, MBBS, MD/MS
Pathophysiology of Acute Compartment syndrome
Definition Mubarak and Hargens (1981) defined compartment syndrome as an elevation of the interstitial pressure in a closed osseofascial compartment that results in microvascular compromise. Pathophysiology Tissue perfusion = Capillary perfusion pressure – Interstitial fluid pressure 3 major theories for microvascular dysfunction and ischemia: Tissue survival: Vicious cycle of compartment…
PGMEE, MRCS, USMLE, MBBS, MD/MS
Dupuytren’s contracture : Mnemonics
Associations of Dupuytren’s Contracture Mnemonic: DEAFEST LIAR Dupuytren’s diathesis Mnemonic: ABCDEF Severity and recurrence risk is increased in: If all 6 diathesis risk factors are present: risk of recurrence is 71% If none of diathesis risk factors are present: risk of recurrence is 23% Involvement of fingers Mnemonic: RaSMIT In…
PGMEE, MRCS, USMLE, MBBS, MD/MS
Congenital Pseudoarthrosis of Tibia (CPT)
Origin of Pathology Periosteum Clinical features Mnemonic: ABCDeF Boyd Classification Mnemonic: B-2C-2D-E I – Bowing II – Constriction (hourlgass) III – Cyst IV – Dense (Sclerotic) V – Dysplastic fibula VI – “Endosseous” (Intraosseous) neurofibroma or schwannoma Paley Classification Type Bone ends Pseudoarthrosis mobility Previous surgical intervention 1 Atrophic Mobile…
PGMEE, MRCS, USMLE, MBBS, MD/MS
Triple deformity of Knee : Mnemonic
Triple deformity of knee consists of 3 components: 1. Flexion deformity at knee 2. Posterolateral subluxation of tibia 3. External rotation of tibia over femoral condyle Mechanism behind triple deformity of knee: Causes of Triple deformity of knee: Mnemonic: TRIPLE 1. Tuberculosis (TB) knee – commonest cause 2. Rheumatoid arthritis…
PGMEE, MRCS, USMLE, MBBS, MD/MS
Meniscus Injury : Mnemonics
Meniscus structure Mnemonic: CD RS McMurray test Mnemonic: The heel of the foot points towards the injured meniscus Meniscus attachments in knee Each meniscus has something attached to it: Tear Patterns Mnemonic: LaHORe FC Tear pattern Description Potential to repair Longitudinal Oriented parallel to edge of meniscusa. Complete tear with…
PGMEE, MRCS, USMLE, MBBS, MD/MS
Charcot Arthropathy : Mnemonics
Causes of Charcot Arthropathy Mnemonic: 10 S 3 Theories of Charcot Arthropathy a. Neuro-traumatic: Damage to sensory feedback → Repeated microtrauma → Release of proinflammatory cytokines → Bone resorption b. Neuro-vascular: Change in vascularity caused by dysregulation of vasomotor and trophic nerve supply c. Neuro-inflammatory: Abnormal persistence of inflammatory response…
PGMEE, MRCS, USMLE, MBBS, MD/MS
Rheumatoid Arthritis – ACR 2021 Guidelines: Summary
Among various methods of measuring disease activity in rheumatoid arthritis, we will be discussing Clinical Disease Activity Index (CDAI). CDAI = TJC(28) + SJC(28) + PGA(10) + EGA(10) Interpretation of CDAI: CDAI Score Range Disease Severity ≤ 2.8 Remission > 2.8 – 10.0 Low > 10.0 – 22.0 Moderate >…