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Education ?

Medical School Score
University of Louisville (1983)

Awards & Distinctions ?

Top 10 Doctor - State (2014)
Emergency Physician
Top 10 Doctor - Metro Area (2014)
Phoenix Metro Area
Emergency Physician

Publications & Research

Dr. Ash has contributed to 7 publications.
Title Non-protein Energy Source in Parenterally Fed Weanling Rats Influences Growth, Body Composition, and Skeletal Muscle Protein Turnover.
Date August 2008
Journal Clinical Nutrition (edinburgh, Scotland)

Comparison was made between three total parenteral nutrition (TPN) regimens given to young, weanling rats for 5 days. The three isoenergetic and isonitrogenous regimens contained different ratios of glucose to lipid as non-protein energy sources, being composed of 100% glucose; 67% glucose/33% fat; and 50% glucose/50% fat respectively. Amino acid content was identical for each regimen. Body weight gain, carcass water and energy content, and in vitro skeletal muscle protein synthesis and degradation rates, were measured. All rats gained weight, but those receiving TPN with 100% of non-protein energy as glucose gained the most wet (live) and dry weight. Energetic efficiency was also significantly higher in this group. However, carcass analysis showed that much of the weight gain in this group was probably due to fat deposition. Although the two TPN groups receiving fat emulsion in addition to glucose gained less weight and had lower energetic efficiencies, weight gain was achieved with a comparatively smaller increase in fat deposition compared to the glucose-only group. In vitro rates of protein synthesis in skeletal muscle were significantly higher in the group receiving 100% glucose, but protein degradation rates in this group were grossly elevated. Protein synthesis rates in the groups receiving lipid were less, but degradation rates were also lower. The results suggest that optimal net protein balance in skeletal muscle was achieved in the group receiving 67% glucose: 33% lipid as the non-protein energy source.

Title Resident's Ridge: Assessing the Cortical Thickness of the Lateral Wall and Roof of the Intercondylar Notch.
Date December 2003
Journal Arthroscopy : the Journal of Arthroscopic & Related Surgery : Official Publication of the Arthroscopy Association of North America and the International Arthroscopy Association

The purpose of this study was to better delineate the anatomy of "resident's ridge," a term coined by William Clancy Jr., M.D., to describe the raised bony landmark commonly visualized just anterior to the femoral attachment of the anterior cruciate ligament (ACL). This landmark can mislead the novice surgeon into misplacing the femoral tunnel of ACL reconstructions.

Title Current Uses of Radiofrequency in Arthroscopic Knee Surgery.
Date October 1999
Journal The American Journal of Knee Surgery

Radiofrequency energy is a promising new technology in arthroscopy. Further basic science work is needed to define the mechanical characteristics of tissues in vivo at different times postoperatively. Long-term clinical follow-up studies are needed to determine the useful applications of this technology in the future.

Title Failure of a Biodegradable Meniscal Arrow. A Case Report.
Date April 1999
Journal The American Journal of Sports Medicine
Title Revision Total Hip Arthroplasty with Cement After Cup Arthroplasty. Long-term Follow-up.
Date February 1996
Journal The Journal of Bone and Joint Surgery. American Volume

Ninety-six cup arthroplasties (eighty-three patients) were converted to total hip arthroplasties with cement between July 1970 and August 1982. Fifty-eight hips (fifty patients) were followed for at least ten years, or to failure after a shorter interval, and eight other hips (eight patients) had a subsequent operation because of a deep infection. Of the fifty-eight hips that were followed for at least ten years or to failure, nine (16 per cent) were revised because of aseptic loosening of the acetabular component, one (2 per cent) was revised because of a traumatic fracture of the femur, and none were revised because of loosening of the femoral component. Kaplan-Meier survivorship analysis with revision for any reason (including infection) as the end point showed a rate of survival of 92 +/- 6 per cent (average and 95 per cent confidence interval) at ten years and of 74 +/- 12 per cent at twenty years. When the hips in which an infection had occurred were excluded, and with revision because of aseptic loosening of the acetabular component as the end point, the rate of survival was 84 +/- 10 per cent at twenty years; no acetabular component was revised because of aseptic loosening in the first ten years. When the hips in which an infection had occurred were excluded, and with radiographic evidence of definite or probable loosening of the acetabular component, or aseptic loosening of the acetabular component necessitating revision, as the end point, the rate of survival was 91 +/- 6 per cent at ten years and 53 +/- 22 per cent at twenty years. The present study demonstrates the durability of total hip replacement with cement after the failure of a cup arthroplasty and further substantiates the excellent long-term clinical and radiographic results that can be obtained with insertion of a femoral component with cement.

Title Quantitative Measurement of Blood Flow Using Cylindrically Localized Fourier Velocity Encoding.
Date January 1992
Journal Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine / Society of Magnetic Resonance in Medicine

A procedure for the quantitative measurement of blood velocity was developed and evaluated in the portal vein, aorta, and vena cava of healthy volunteers. This procedure utilizes Fourier velocity encoding and can be performed with or without cardiac gating. The accuracy of velocity measurements is determined by the accuracy of the gradient subsystem. Flow measurements derived from the velocity measurement are further limited in their accuracy by the luminal cross-section measurement. Spatial localization is accomplished with an excitation pulse having a cylindrical rather than slab geometry. Data are acquired in the presence of a readout gradient to provide resolution along the cylindrical axis.

Title Effect of Parenteral Nutrition on Protein Turnover in Endotoxaemic Rats.
Date July 1989
Journal Clinical Science (london, England : 1979)

1. Intravenous infusion of endotoxin into rats over 18 h caused a reduction in food intake to 20% of normal levels, weight loss, hypoalbuminaemia and a fall in rates of protein synthesis in vivo in heart and skeletal muscle. 2. Measurements of protein turnover in vitro in skeletal muscle of endotoxaemic animals, showed a 50% fall in protein synthesis rates and a 200% increase in rates of protein degradation. 3. Total parenteral nutrition was only partially able to reverse endotoxin-induced weight loss. Total parenteral nutrition did not reverse endotoxin-induced catabolism in cardiac or skeletal muscle, but was able to reverse the catabolism of protein in skeletal muscle produced by starvation. 4. Endotoxin treatment elevated rates of protein synthesis in vivo in liver. The combination of parenteral nutrition and endotoxaemia further increased the rate of protein synthesis in the liver. Parenteral nutrition did not influence endotoxin-induced hypoalbuminaemia.

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