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Biomedical subjects

B C West

Publications and source records attributed to B C West.

At least 19 recordsLinked to original sources
PubMed2001

Avoiding the futility of resuscitation.

PURPOSE: To identify patients who should not have resuscitation started or continued. DESIGN: Multi-disciplinary prospective study. SUBJECTS: Two hundred forty-one consecutive patients with cardiopulmonary arrests from January 1995 to February 1997 were evaluated, of which 200 were studied. METHODS: Subjects were studied for age, sex, arrest location, CPR duration, recovery from arrest, hospital discharge, 6 weeks' survival, sepsis and co-morbid conditions. RESULTS: Overall 69 (34.5%) recovered from the arrest, 24 (12.0%) left the hospital, and 17 (8.5%) survived 6 weeks. Of inpatients, 13.7% (16/117) were alive at 6 weeks in contrast to 1.2% (1/83) of field/emergency room (ER) arrests. Sepsis did not lessen the immediate recovery rate; however, none of 25 septic patients survived hospitalization. Outcomes were not different between men and women or regular floor and ICU/CCU arrests. Age of survivors was the same as non-survivors. Survivors were resuscitated for 18.7+/-16.5 min and non-survivors 33.1+/-18.4 min (P=0.15). The initial rhythm of asystole or the presence of three or more co-morbid conditions had a negative prognosis. CONCLUSION: CPR survival is problematic, and it is especially poor in field/BR arrests. Emergency squads should terminate CPR for pulseless patients after communicating with the ER physician. Age is not a determinant of recovery or survival. Arrest outside of the hospital, sepsis, three or more co-morbid conditions, previous CPR, asystole or resuscitation for >25 min all decrease the chance of hospital discharge and survival. Instituting or continuing CPR in a great majority of these patients is futile. Families should be so advised.

Adolescent↗
PubMed2001

Disseminated Pseudomonas aeruginosa and necrotizing pneumonia with complete recovery.

Pseudomonas aeruginosa pneumonia and recovery with treatment are rare in healthy individuals. We report the case of a 59-year-old man with P aeruginosa skin infection and sepsis, later giving rise to necrotizing pneumonia by hematogenous spread. He responded to prolonged intensive care and 3 weeks of piperacillin-tazobactam and tobramycin therapy. There was no evidence of immunosuppression other than that caused by alcoholism in this unusual case. The resulting cavity healed completely by fibrosis in 1 year.

Alcoholism↗
PubMed2000

Unilateral internuclear ophthalmoplegia and recovery with thiamine in Wernicke syndrome.

Internuclear ophthalmoplegia is usually caused by multiple sclerosis, tumors, or vascular lesions of the brain stem. We report a patient with Wernicke syndrome who presented with a right-sided internuclear ophthalmoplegia. He recovered completely with intravenous thiamine (vitamin B1). There were no lesions in the magnetic resonance image (MRI) of the brain, suggesting a derangement at the cellular level as the cause.

Humans↗
PubMed2000

Omeprazole inhibits phagocytosis and acidification of phagolysosomes of normal human neutrophils in vitro.

We postulated omeprazole inhibition of the neutrophil proton pump, impairing phagocytosis and phagolysosomal acidification. Neutrophils from healthy human beings were treated with omeprazole prodrug 0.5 mM/l or acid activated omeprazole 0.5 mM/l, then incubated with killed Saccharomyces cerevisiae stained with bromcresol purple. Wet mounts were done at 10, 30 and 60 minutes. Percent neutrophils phagocytosing, percent yeast phagocytosed, and yeast per phagocytosing neutrophil were significantly decreased in acid activated omeprazole compared to controls and omeprazole prodrug. In contrast, percent acidification of intracellular yeast was significantly lower in both omeprazole prodrug and acid activated omeprazole compared to controls. Over time, control neutrophils showed an increase in percent yeast phagocytosed and yeast per phagocytosing neutrophil. When treated with acid activated omeprazole, the percent of neutrophils phagocytosing progressively decreased over time. We observed 1) omeprazole prodrug does not inhibit neutrophil phagocytosis but does inhibit phagolysosomal acidification, whereas 2) acid activated omeprazole inhibits both neutrophil phagocytosis and phagolysosome acidification. We conclude that omeprazole impairs these neutrophil functions in vitro.

Adult↗
PubMed2000

Cocaine inhibits human neutrophil phagocytosis and phagolysosomal acidification in vitro.

Cocaine, used intravenously, increases the risk of infections, but its effects on neutrophil phagocytosis have not been examined in vitro. Human neutrophils were suspended in cocaine hydrochloride 0, 1, 10, 50, 100 or 200 microg/ml in Hank's balanced salt solution to which was added a phagocytic meal of killed Saccharomyces cerevisiae stained with the pH indicator dye bromcresol purple. Yeast per phagocytosing neutrophil and the percent neutrophils phagocytosing yeast were reduced in neutrophils treated with cocaine 100 and 200 microg/ml (P < 0.05). When examined for percent of yeast phagocytosed after 10 minutes, neutrophils treated with cocaine 1-200 microg/ml demonstrated a decrease (P < 0.05). However, at 60 minutes only neutrophils treated with cocaine 50 and 100 microg/ml still showed a decrease in percent of yeast phagocytosed. Phagolysosomal acidification was impaired in neutrophils treated with 50, 100 and 200 microg/ml cocaine. Thus, cocaine inhibits neutrophil phagocytosis and phagolysosomal acidification in vitro, offering a reason for cocaine users/abusers to have impaired host defense and to be potentially at higher risk for infections.

Cocaine↗
PubMed1999

Angiotropic large cell lymphoma presenting as fever of unknown origin.

BACKGROUND: Fever has never before been described as the chief complaint and major finding in angiotropic large cell lymphoma (ALCL). ALCL is a rare and usually fatal intravascular tumor characterized by a widespread proliferation of malignant mononuclear cells within vessels of small caliber, causing their blockage. The majority present as high-grade, B-cell lymphomas with a predilection for the central nervous system and the skin. CASE REPORT: We report a 61-year-old woman who presented with a fever of unknown origin (FUO) that lasted 9 weeks from onset to death. To our knowledge, this is the first case of ALCL to present solely as a FUO, and the second case of ALCL to be diagnosed by muscle biopsy. CONCLUSION: We suggest that this rare malignancy (ALCL) be considered in the differential diagnosis of FUO.

Diagnosis, Differential↗
PubMed1999

Dyspnea differentiation index: A new method for the rapid separation of cardiac vs pulmonary dyspnea.

STUDY OBJECTIVE: To assess the utility of a new parameter in the differentiation of dyspnea of cardiac origin from dyspnea of pulmonary origin. METHODS: The peak expiratory flow (PEF) rate and the partial pressure of oxygen in arterial blood (PaO(2)) were measured in 71 patients with the chief complaint of dyspnea. The patients were treated in the hospital, and the final diagnosis (cardiac or pulmonary) of the cause of dyspnea was made at discharge. We defined a new measure, the dyspnea differentiation index (DDI), as (PEF x PaO(2))/1,000. We performed a receiver operating characteristic (ROC) curve analysis of the data to define the measure that best distinguished cardiac from pulmonary dyspnea. The curves also allowed us to establish an optimal cut-off point to distinguish between cardiac and pulmonary dyspnea. RESULTS: Patients with pulmonary dyspnea had a significantly lower mean PEF than patients with cardiac dyspnea (144 +/- 66 vs 267 +/- 97 L/min, respectively; p < 0.001). They also had a lower DDI than patients with cardiac dyspnea (8.4 +/- 4.0 vs 18.4 +/- 7.9 L-mm/min, respectively; p < 0.001). These two measures, PEF and DDI, also best distinguished pulmonary from cardiac dyspnea. PEF was able to diagnose the correct cause of dyspnea in 72% of patients, and DDI was correct in 79% of patients. This compares favorably to the performance of the emergency department physicians, who were able to predict the correct diagnosis in only 69% of patients. CONCLUSION: These results demonstrate that the PEF by itself is useful in differentiating between cardiac and pulmonary causes of dyspnea, but that the calculation of DDI is superior in this regard.

Adult↗
PubMed1998

Acalculous cholecystitis and septicemia caused by non-O1 Vibrio cholerae: first reported case and review of biliary infections with Vibrio cholerae.

The first case of septicemic acute acalculous cholecystitis caused by non-O1 Vibrio cholerae is described in a healthy traveler, and biliary tract infections from V. cholerae are reviewed. Immediately after a vacation in Cancun, Mexico, a 55-year-old man developed acute cholecystitis. Blood and bile cultures grew non-O1 V. cholerae. At surgery, the gallbladder was acalculous, inflamed, distended, and nearly ruptured. Pathogenetic factors may have included diarrhea prophylaxis with bismuth subsalicylate, distension of the gallbladder from illness-induced fasting, and bacterial toxins in the gallbladder. The patient received i.v. cephapirin, followed by oral cephradine for a total of 10 days, and he made a quick and complete recovery. V. cholerae should be considered in the differential diagnosis of persons from endemic areas who present with cholecystitis or acute jaundice.

Bacteremia↗
PubMed1998

Kluyvera cryocrescens finger infection: case report and review of eighteen Kluyvera infections in human beings.

We report a case of soft tissue infection with Kluyvera cryocrescens and a critical review of Kluyvera infections. A 31-year-old diabetic man used a new chemical for stripping the floor with his bare hands. Two days later he developed a blister on a finger which progressed to tenosynovitis in spite of intravenous nafcillin therapy. After 11 days culture and sensitivity results dictated treatment with intravenous ticarcillin/clavulanic acid. The wound was debrided twice, and later a skin flap was done. Wound cultures became sterile after 7 days of treatment with ticarcillin/clavulanic acid, and he recovered. This case represents the fourth clinical infection with K. cryocrescens and the eighteenth of Kluyvera to be reported. Four others were K. ascorbata, and the remaining ten Kluyvera infections in humans were not identified beyond genus. Our case and review of the 17 previous cases emphasize that while Kluyvera rarely cause disease, these opportunistic Gram-negative bacilli may be virulent in a variety of sites under as yet poorly defined host conditions. Sites of infection varied, but the brain and meninges were not among them. Two patients had diabetes mellitus, none had AIDS, and four died. Once shown clinically to be the cause of an infection, Kluyvera deserve aggressive treatment which acknowledges their ampicillin resistance.

Adult↗
PubMed1998

Esophageal papillomatosis from human papilloma virus proven by polymerase chain reaction.

Human papilloma viruses (HPVs) are known to infect the genitourinary tract, the skin, the anal canal, and the upper respiratory tract. Esophageal papillomas and especially HPV-induced squamous papillomas of the esophagus are rare. The authors report a case of extensive HPV-induced esophageal polyposis, which was probably sexually transmitted. The 53-year-old female patient presented with chronic diarrhea and had occult blood in the stool. She underwent esophagogastroduodenoscopy, at which time multiple esophageal polyps were observed and biopsy specimens obtained. Histologic evaluation was consistent with benign papillomas. Polymerase chain reaction and DNA hybridization of the biopsied tissue specimens confirmed the diagnosis of HPV infection. Because of our observation and because of HPV's relationship to cervical and esophageal cancer, further evaluation of HPV as the cause of esophageal papillomatosis and as a risk factor for esophageal cancer is warranted.

Esophageal Diseases↗
PubMed1997

Extensive mesenteric inflammatory veno-occlusive disease of unknown etiology after primary cytomegalovirus infection: first case.

We report a young man who, shortly after a primary cytomegalovirus infection, presented with signs of intestinal ischemia requiring surgical intervention. The resected specimen of small bowel showed striking features of extensive phlebitis and venulitis affecting virtually all of the veins of the small intestine and mesentery. Although he had had a recent primary cytomegalovirus viremia, we could not identify any evidence of cytomegalovirus in the small bowel. He was not infected with HIV. The entity we describe is different from the recently reported mesenteric inflammatory veno-occlusive disease. The clinicopathologic entity represented by our patient's disease was heretofore unrecognized.

Adult↗
PubMed1995

Case report: subacute combined degeneration of the spinal cord from folate deficiency.

Subacute combined degeneration of the spinal cord is a rare neurologic complication of folate deficiency. Progressive gait disturbance, weakness, confusion, and depression developed in a 39-year-old man. He had taken phenobarbital for more than 2 years. He was bedbound, with new loss of position and vibration senses in the lower extremities. His hemoglobin was 2.9/dl, mean corpuscular volume 122 fl, vitamin B12 428 pg/ml, and folate 1 ng/ml. Peripheral blood and bone marrow showed megaloblastic anemia. Serum methylmalonic acid and homocysteine levels were consistent with folate deficiency, not B12 deficiency. Treatment with folate and packed erythrocytes resulted at 4 months in overall improvement, including walking. Position sense was restored, and vibration sense had become nearly normal. The authors found no cause for folate deficiency except phenobarbital.

Adult↗
PubMed1995

Mucormycosis caused by Rhizopus microsporus var. microsporus: cellulitis in the leg of a diabetic patient cured by amputation.

Mucormycosis accompanied the development of bacterial infection in the leg of a diabetic African-American man. Local injury, diabetic ketoacidosis, renal insufficiency, and antimicrobial therapy were factors that contributed to the pathogenesis of the mucormycosis. The cellulitis was caused in part by Rhizopus microsporus var. microsporus and was cured by amputation. We report this unusual case of mucormycosis to emphasize the value of fungal identification, to illustrate a dramatic and successful clinical result, and to draw attention to an apparent role for bacterial infection and its treatment in the pathogenesis of mucormycosis. It is the third case report of mucormycosis in a human in which R. microsporus var. microsporus was definitively identified as the etiologic agent.

Adult↗
PubMed1993

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Attitude of Health Personnel↗