Ortho Oracle - orthopaedic operative atlas

Acinetobacter anitratus

IMP  Ciproflox AP Pen Ceftaz S/S: symptoms vary depending on site of infection, are similar to infections caused by other opportunistic gram negative bacteria; Rarely, if ever cause infections in healthy individuals; Nosocomial septicemias associated with indwelling IV catheters; Urinary tract infections due to indwelling bladder catheters Source: Soil, water; Skin: Groin, axilla, antecubital fossa; … Read more

A Biomechanical Comparison of Intramedullary Nail and Crossed Lag Screw Fixation for Tibiotalocalcaneal Arthrodesis

Foot Ankle Int. 1997 Oct;18(10):639-643   Berend ME, Glisson RR, Nunley JA ABSTRACT  BACKGROUND: This study compared the mechanical bending and torsional properties of intramedullary nail fixation and lag screw fixation for tibiotalocalcaneal arthrodesis.   METHODS: Seven matched pairs of human cadaver lower extremities were studied, with one hindfoot in each pair stabilized with a … Read more

A Biomechanical Evaluation of Three Forms of Internal Fixation Used in Ankle Arthrodesis

Foot Ankle Int. 1994 Jun;15(6):297-300   Dohm MP, Benjamin JB, Harrison J, Szivek JA ABSTRACT BACKGROUND: A biomechanical study was undertaken to evaluate the relative stability of three types of internal fixation used for ankle arthrodesis.   METHODS: Crossed screw fixation, RAF fibular strut fixation, and T-plate fixation were tested in 30 cadaver ankles using … Read more

A Review of Ankle Arthrodesis: Predisposing Factors to Nonunion

Foot Ankle Int. 1994 Nov;15(11):581-584   Frey C, Halikus NM, Vu-Rose T, Ebramzadeh E   ABSTRACT   BACKGROUND: The purpose of this study was to review 15 years of experience with ankle fusions, specifically addressing the underlying etiology of ankle pathology, incidence of nonunion, and associated predisposing conditions that can lead to nonunion.   METHODS: … Read more

A-a GRADIENT

  P(A-a)O2 = PAO2 – PaO2;  PaO2, PaCO2: Calculated from ABG:   PAO2 = (712 x FIO2) – (PaCO2/0.8);  or  (712-pCO2)-pO2   Normal P(A-a)O2 = 12 mm Hg in the young Adult to 20 mm Hg at age 70 yo;   In pure Ventilatory Failure the P(A-a)O2 will remain 12 to 20 mm Hg; in … Read more

A Band

– Discussion:     – anisotropic band, the A band appears dark;     – it is composed of parallel thick and thin filaments;     – it is composed of interdigitating areas of myosin and actin; – H Zone:     – each A band is bisected by light area, or H zone;   … Read more