Papers by john humphrey Fernandez
Agronomia Colombiana, Jun 1, 2007
Evaluación de diferentes concentraciones de algunos reguladores de crecimiento en la multiplicaci... more Evaluación de diferentes concentraciones de algunos reguladores de crecimiento en la multiplicación y enraizamiento in vitro de Limonium var. Misty blue Evaluation of different concentrations of some plant growth regulators on in vitro multiplication and rooting of Limonium var. Misty blue
Agronomia Colombiana, Jan 30, 2013
Micropropagación eficiente de estragón francés (Artemisia dracunculus L.
Ensuring Minority Success in Corporate Management, 1988
The following comments drawn from the responses of 9,000 employees in 13 companies to surveys con... more The following comments drawn from the responses of 9,000 employees in 13 companies to surveys conducted in 1984 and 1985 stand in stark contrast to President Reagan’s avowal that America in the 1980’s, is color- and gender-blind.
Transplantation, 1990
Advertisement. Close Window. Close Window. Thank you for choosing to subscribe to the eTOC for Tr... more Advertisement. Close Window. Close Window. Thank you for choosing to subscribe to the eTOC for Transplantation. Enter your Email address: Wolters Kluwer Health may email you for journal alerts and information, but is committed ...
Kidney International, 1988
Outcome of patients with human immunodeficiency virus on maintenance hemodialysls. Fifty-one adul... more Outcome of patients with human immunodeficiency virus on maintenance hemodialysls. Fifty-one adults with HIV infection, including 20 chronic hemodialysis patients with superimposed HIV infection and 31 patients with HIV-associated nephropathy requiring chronic maintenance hemodialysis were followed to evaluate survival on outpatient dialysis in relation to the clinical stage of the HIV infection. Regardless
Journal of Shoulder and Elbow Surgery, 2003
This report represents a multifactorial investigation of a new technique in which a titanium Endo... more This report represents a multifactorial investigation of a new technique in which a titanium EndoButton was used for repair of distal biceps tendon ruptures. Cadaveric cases were used to demonstrate the anatomic efficacy and safety of the procedure. Biomechanical testing was done to compare the fixation strength of traditional techniques with the EndoButton repair. Finally, clinical results of the repair were evaluated. In 15 fresh-frozen cadavers the mean distance of the button from the posterior interosseous nerve was 9.3 mm. Instron testing showed a mean pullout strength of 253 N for the Mitek G4 Superanchor, 177 N for a conventional bone bridge, and 584 N for the titanium button. The button was 3 times stronger than the bone bridge (P =.0001) and 2 times stronger than the Mitek anchor (P =.0007). Fourteen patients who had their tendons repaired by this technique were evaluated at a mean of 20 months postoperatively. BTE (Baltimore Therapeutic Equipment, Baltimore, MD) testing revealed recovery of 97% of flexion strength and 82% of supination strength. Patients were able to participate in an aggressive rehabilitation program and were able to regain strength and function rapidly, with satisfactory return to preinjury activities and occupations. This technique is safe, simple, and stronger than any currently available anchoring techniques and gives the surgeon a choice in bone preparation. By using a single anterior elbow approach, the development of synostosis associated with two incision techniques can be minimized.
Journal of Shoulder and Elbow Surgery, 2007
Figure 4 Follow-up anteroposterior (A) and lateral (B) radiographs at 6 months after reconstructi... more Figure 4 Follow-up anteroposterior (A) and lateral (B) radiographs at 6 months after reconstruction show no evidence of bone changes or heterotopic ossification.
The Journal of Hand Surgery, 2014
Hand surgeons are frequently challenged by the unique requirements of soft tissue coverage of the... more Hand surgeons are frequently challenged by the unique requirements of soft tissue coverage of the hand. Whereas many smaller soft tissue defects without involvement of deep structures are amenable to healing by secondary intention or skin grafting, larger lesions and those with exposed tendon, bone, or joint often require vascularized coverage that allows rapid healing without wound contraction. The purpose of this review was to present an overview of local and regional flaps commonly used for soft tissue reconstruction within the hand.
The Journal of Hand Surgery, 2013
Radioscapholunate arthrodesis is performed for patients who experience pain and disability from r... more Radioscapholunate arthrodesis is performed for patients who experience pain and disability from radiocarpal arthritis. Initial reports from the 1980s demonstrated high nonunion rates and marginal clinical outcomes. Improvements in surgical technique and clearly defined indications have reduced nonunion rates and improved patient satisfaction. We present a technique using headless compression screws inserted through a dorsal approach, which optimizes hardware placement and incorporates local bone graft harvested from the insertion site to supplement the arthrodesis.
The Journal of Hand Surgery, 2010
Arthritis of the thumb carpometacarpal (CMC) joint is a common condition, for which reconstructio... more Arthritis of the thumb carpometacarpal (CMC) joint is a common condition, for which reconstruction using the flexor carpi radialis (FCR) is a standard treatment. We describe the technique and clinical results for thumb CMC arthroplasty using interference screw fixation of the FCR to the first metacarpal through a single incision. Over 12 months, 29 consecutive CMC arthroplasties were performed in 29 patients using FCR transfer tenotomized at the level of the scaphoid with an absorbable biotenodesis screw for fixation. There were 24 women and 5 men, with a mean age of 58 years. Patients were evaluated at a minimum of one year with radiographs, standardized outcome instruments, and measurements of motion and strength. The scaphoid to first metacarpal distance was measured at 2 weeks, 3 months, and greater than 1 year to assess settling. A total of 28 patients were available at a mean of 19 months. No arthroplasties required revision. Postoperative scaphoid to first metacarpal distance was 5.9 mm, which had decreased by a mean of 1.4 mm at final follow-up. There were no side-to-side differences in range of motion or strength in the entire cohort except for lateral key pinch, which was lower on the reconstructed side. The mean postoperative Disabilities of the Arm, Shoulder, and Hand score was 15, and the mean visual analog scale score was 1. Correlations were found between age and lateral key pinch strength for the reconstructed and contralateral sides. There were no significant relationships among Disabilities of the Arm, Shoulder, and Hand score, visual analog scale, radiographic settling, side-to-side strength or range of motion versus gender, Eaton stage, or workers' compensation status. Our series demonstrates excellent clinical outcomes with no revisions at an average of 19 months for this technique. Strength, range of motion, and radiographic settling compare favorably with published results of alternative techniques. Except for lateral key pinch, there was no statistically significant difference in strength compared with the contralateral side. Therapeutic IV.
The Journal of Hand Surgery, 2008
The purpose of this study is to evaluate the coverage patterns of whole and split flexor carpi ul... more The purpose of this study is to evaluate the coverage patterns of whole and split flexor carpi ulnaris (FCU) pedicle muscle flaps for posterior elbow soft-tissue defects. Methods Seventeen fresh-frozen cadaveric upper extremities were used. The whole FCU was raised to the dominant vascular pedicle and transposed proximally over the olecranon. The widths of coverage at 2-cm distances about the posterior elbow were measured. Widths were also measured after making 3 longitudinal cuts in the fascia and after suturing the muscle to adjacent soft tissue under tension. The FCU was also split into its ulnar and humeral heads along the central tendon. The larger ulnar head was transposed and the widths again measured. Mid-forearm circumference, elbow circumference, and ulnar length were assessed for ability to predict flap width. Results The whole muscle under no tension provided an average of 2.7 cm width coverage at the tip of the olecranon process. Cutting the fascia provided approximately 15% additional width and suturing the muscle to the surrounding soft tissue an additional 25%, to approximately 4 cm. The isolated FCU ulnar head provided approximately 75% of the width of the entire muscle. Mid-forearm circumference was the most predictive of flap width, and divisors were generated that improved the accuracy of predicting the width for outlier specimens. The dominant pedicle was a consistent distance relative to the end of the central tendon and the olecranon tip. Conclusions The whole and split FCU pedicle flaps provide predictable coverage for 2-to 4-cm posterior elbow soft-tissue defects. For especially large and small arms, the divisors improve accuracy in predicting flap width. Consistent locations of the olecranon tip and the end of the central tendon in relation to the dominant pedicle make them useful surgical landmarks.
The American Journal of Digestive Diseases, 1970
A study was undertaken to determine if extrahepatic recticuloendothelial uptake of 19SAu during h... more A study was undertaken to determine if extrahepatic recticuloendothelial uptake of 19SAu during hepatic scanning could be used as a measure of the portal venous pressure in patients with chronic diffuse liver disease. Twenty patients were studied by history, physical examination, liver function studies, liver biopsy, esophagoscopy, ~98Au hepatic scan and wedged hepatic vein pressure measurements. Patients were separated into 2 groups: Group A~patients with neither spleen or lumbar vertebral bone marrow uptake of 19SAu; Group B-patients with significant spleen and/or vertebral bone marrow uptake of isotope. Each of the 6 patients in Group A had a hepatic wedge pressure under 18 mmHg, and none had varices on esophagoscopy. All 14 patients in Group B had hepatic wedge pressures of 18 mmHg or more. Only 8 Group B patients had varices on esophagoscopy. These data suggest that the a9SAu hepatic scan is a safe and valuable procedure for estimating the degree of portal venous hypertension in patients with diffuse chronic liver disease, in these 20 patients, if spleen or vertebral bone marrow uptake of isotope was present, the portal venous pressure was 18 mmHg or greater. If spleen and/or bone marrow uptake was lacking, then the portal venous pressure was below 18 mmHg. Hepatic photoscanning with radioactive gold (l°SAu) has been proposed as a useful procedure for evahtating the degree of portal-systemic collateral circulation in patients with diffuse liver disease. Normally, there is no uptake of 19SAu by the reticuloendothelial cells of the spleen or bone marrow. Several reports have suggested the relationship between the presence of advanced cirrhosis and increased uptake of the isotope by the spleen and vertebral bone marrow (1-4). To our knowledge, there has been no correlation between the
Architectural Research Quarterly, 2003
Buildings are constructed, expanded, refurbished, demolished, deconstructed and relocated in resp... more Buildings are constructed, expanded, refurbished, demolished, deconstructed and relocated in response to the essential needs of contemporary societies. Inevitably, these needs evolve with time. Modern design and construction have always operated in a constantly shifting context of requirements and resources. It is well known that unanticipated forces and emerging circumstances have compelled change in architecture through the ages and yet, most buildings are constructed to serve for countless decades (Kronenburg, 2000, Brand, 1994). During that time, buildings are exposed to an enormous range of fluctuating pressures. In this age of furious technological innovation, growing global ecological awareness and changing economic and societal priorities, the pace of change is increasingly frenetic. Out of this state of affairs arise both significant challenges and intriguing opportunities.
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Papers by john humphrey Fernandez