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Biomedical subjects

R A Jack

Publications and source records attributed to R A Jack.

11 recordsLinked to original sources
PubMed1998

Relationship between race start characteristics and risk of catastrophic injury in thoroughbreds: 78 cases (1992).

OBJECTIVE: To investigate relationships of several racehorse characteristics and race conditions with risk of a catastrophic musculoskeletal injury (CMI) resulting in euthanasia in Thoroughbreds during racing in California in 1992. DESIGN: Retrospective longitudinal study. ANIMALS: Thoroughbreds that incurred CMI during racing and all California race entrants in 1992. PROCEDURE: Necropsy records were reviewed, and race start information was obtained. Incidence risk of CMI/1,000 race entrants was estimated. Relationships between CMI during racing and race-meet, entrant age and sex, race type and length, and racing surface type and condition were evaluated by use of logistic regression. RESULTS: Incidence risk of CMI was 1.7/1,000 entrants. A higher risk of CMI was found at 2 fair race-meets, with incidence risks of 4.9 and 5.5/1,000 entrants. Risk of injury in male horses was 1.7 times greater than that in female horses, and influence of age on risk depended on race type. Risk of injury for horses 2 to 5 years old was two times greater for claiming horses than for maiden horses. Race length or racing surface type (dirt vs turf) or condition (fast, muddy, yielding) were not significantly associated with risk of CMI. CLINICAL IMPLICATIONS: Incidence of CMI was similar among 12 of 14 major and fair race-meets and among various race lengths and racing surface types and conditions, whereas incidence of CMI was influenced by entrant age and sex as well as race type. Investigators should consider controlling for age and sex, race-meet, and race type whenever possible in studies of risk of CMI.

Age Factors↗
PubMed1986

Educational opportunities and inpatient psychiatry.

Despite inpatient psychiatry's longstanding role as a mainstay of psychiatric training, very little attention has been directed toward the educational opportunities of inpatient work. Experience rather than research has been our guide. Together with a brief history of inpatient psychiatry, the educational aspects of this setting have been discussed. The results of an informal survey supplement the text. We conclude with several educational concerns currently developing as a natural result of the ever-changing face of our profession. Our aim has been to provide a serious consideration of the issues and we invite our readers to expand upon or disagree with any or all of our contentions. We trust our ultimate goals are the same: to provide our profession with a steady supply of competent teachers, researchers and clinicians. Our patients can only benefit from this endeavor.

Curriculum↗
PubMed1985

Regional cerebral blood flow in a patient with multiple personality.

Cerebral blood flow was measured in a patient with multiple personality during two different personalities, the same patient after recovery, and three control subjects. Personality change was associated with no significant alterations in cerebral blood flow except right temporal hyperperfusion.

Adult↗
PubMed1985

A case of mania secondary to propafenone.

A case of mania secondary to the administration of a new antiarrhythmic, propafenone, is described. This is a previously unrecognized potential complication in the use of this agent. Since propafenone is chemically related to a new antidepressant, bupropion, it may possess some antidepressant activity and thus have the potential to produce affective psychiatric side effects.

Adult↗
PubMed1985

Anxiety disorders: diagnosis and treatment.

Pathologic anxiety, marked by inappropriate apprehension and/or fear, causes patients to seek help. Anxiety is associated with a wide variety of physical illnesses, and these must be initially considered when making a diagnosis. Similarly, anxiety associated with a wide variety of psychiatric syndromes must also be considered. Finally, the possibility of transient situational anxiety is ever present. Once it is determined that a primary anxiety disorder exists, then the presence or absence of phobias, panic attacks, and chronic "free-floating" anxiety will fully characterize the disorder. With an accurate diagnosis in hand, a multifaceted treatment approach can be designed. Effective treatments now exist for phobic and panic disorders, and more effective treatment for chronic generalized anxiety may be forthcoming.

Adrenergic beta-Antagonists↗
PubMed1984

Acute paranoid disorder in a Southeast Asian refugee.

The clinical course of a 23-year-old male Vietnamese refugee who was seen for psychiatric evaluation and treatment after a self-inflicted abdominal stab wound is described. His attempted suicide was precipitated by a rejection of his romantic advances by an American woman and teasing by fellow co-workers that he was a Communist spy. Central to the development of paranoid delusions in this patient was the fact that he had been a member of the Communist forces in Cambodia and feared deportation. Emigration and acculturative stressors were seen as contributing significantly to this patient's paranoid disorder.

Acculturation↗
PubMed1983

Secondary mania as a presentation of progressive dialysis encephalopathy.

A case of acute mania in a 50-year-old woman who had received hemodialysis treatment for 2 1/2 years is described. The patient's presentation with secondary manic and associated psychotic features was the initial symptom of the syndrome of progressive dialysis encephalopathy (PDE). Shortly thereafter, an abnormal EEG tracing was obtained. Several months later she developed dysarthria and muscular twitchings and EEG changes persisted, a symptom complex characteristic of PDE. The appearance of psychiatric symptoms among patients receiving chronic dialysis treatment may herald the onset of PDE.

Affective Disorders, Psychotic↗