Sergio F. Brena

Learn More
Phantom urinary phenomena are a relatively rare disease entity. Literature search has revealed only one case following cystectomy, seven cases following spinal cord injury and several other cases in hemodialysis patients. This report presents a case of painful phantom bladder following cystectomy for chronic kidney and urinary tract infection. Treatment was(More)
Tree failure may cause significant economic and societal disruptions in urban environments. A better understanding of the relationship between branches and stem as they affect the dynamic response of decurrent trees under wind loading is needed to reduce the risk of tree failure. Finite element (FE) models were used to identify the parameters that primarily(More)
We model varying decay in tree cross-sections by considering bending theory to estimate moment capacity loss (MCL) for the sections. We compare MCL with experiments on selected oak trees. Tree failures can damage property and injure people, sometimes with fatal consequences. Arborists assess the likelihood of failure by examining many factors, including(More)
The current study used multidimensional clustering to delineate empirically subgroups of chronic pain patients and to compare their responses to interdisciplinary pain rehabilitation. A total of 180 chronic pain patients were used as subjects. They were administered the Sickness Impact Profile (SIP), Medical Examination and Diagnostic Information Coding(More)
A consecutive sample of chronic pain patients presenting themselves for evaluation was studied. A set of 25 bi-polar adjectives was developed from medical records of previous pain patients' descriptions of their pain. Using the Semantic Differential (S-D) method, each patient rated the extent to which his/her pain was best described by either of the(More)
Difficulties in assessing and quantifying the biomedical signs and symptoms that may be related to patients' reports of pain are well recognized. Although there appears to be some consensus among physicians as to the potential utility of examination and diagnostic tests frequently used to evaluate chronic pain patients, little attention has been paid to the(More)
One hundred patients were selected who had completed an outpatient rehabilitation program designed to teach competent coping with chronic pain. Data at follow-up periods averaging 21 months posttreatment indicated statistically significant decreases in subjective pain intensity and increases in activities of daily living with substantial reductions in use(More)