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Results 251 - 300 of 390
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Brizel D M - - 1997
This laboratory previously demonstrated that hyperbaric oxygen and hyperbaric carbogen improved oxygenation in the R3230Ac tumor, but normobaric 100% O2 and carbogen did not. The current study assessed tumor growth after exposure to radiation plus either hyperbaric oxygen, carbogen or carbogen/nicotinamide and the relationship between pretreatment tumor oxygenation and growth ...
Zuckier L S - - 1997
Radionuclide tracer techniques are intimately associated with some of the early ground-breaking investigations in erectile dysfunction and have evolved along with the field. At the present time, the various investigations can be grouped into four categories: labeled blood-pool; tracer washout; tracer washin and combined blood-pool/tracer and tracer washout examinations. Blood ...
Denchev Z I - - 1997
A modified graphite electrode was produced by adsorption the bis(diisopropyloxythiophosphone)disulphide {(i-PrO-)(2)P(S)S-}(2) under vacuum. Its electrochemical characteristics in flowing stream were described. The modified electrode has been used for simultaneous determination of Cu(II), Ag(I) by flow injection anodic stripping voltammetry.
Maynor M L - - 1997
OBJECTIVES: Loxosceles reclusa (brown recluse) spider bites can produce severe skin lesions that may necessitate extensive surgical repair. This study delineated the effects of hyperbaric oxygen (HBO) therapy on these lesions by performing a prospective controlled animal study. METHODS: After approval by the Institutional Animal Care and Use Committee, 41 ...
Litscher G - - 1997
Continuous monitoring of dynamic changes of transcranial regional cerebral oxygenation (rSO2) was performed in 7 healthy volunteers (mean age 40.9 +/- 12.6 years; range 25-62 years) during normo- and hyperbaric oxygenation (HBO at 2.5 and at 1.95 ATA) using an INVOS 3100 cerebral oximeter. A significant change between HBO and ...
Kaps M - - 1997
BACKGROUND AND PURPOSE: Microembolic signals (MES) are frequently observed by transcranial Doppler ultrasound after prosthetic heart valve implantation. Whether these MES are due to solid or gaseous particles is uncertain. We hypothesized that MES are gaseous and that if they are due to cavitation effects, their occurrence should respond to ...
Rouhana N - - 1997
A vapor-phase bioreactor has been developed utilizing porous metal membranes in a cylindrical design employing radial flow as opposed to traditional axial flow for the vapor stream. The system was evaluated for the biodegradation of p-xylene (p-xylene) from a water-saturated air stream by Pseudomonas putida ATCC 23973 immobilized onto sand. ...
Palmer R W - - 1996
The efficacy of Bacillus thuringiensis var. israelensis (B.t.i.) and temephos in controlling the pest blackfly Simulium chutteri Lewis along the middle Orange River between 1990 and 1995, was assessed. Larvicides were applied by helicopter to rapids and riffles between Hopetown and Onseepkans, a river distance of 807 km. Larvicidal efficacy ...
Visser G H - - 1996
In the present study, experimental exposures to hyperbaric oxygen (HBO2) were performed (30-min exposure to 2.8 bar (280 kPa) pure oxygen). During all phases of the experiment, blood flow velocity in the right middle cerebral artery was monitored with transcranial Doppler (TCD) sonography. Time courses of heart rate, blood pressure, ...
Glass J M - - 1996
OBJECTIVES: To determine whether the measurement of penile blood flow by colour Doppler imaging (CDI) and the subjective impressions generated from CDI correlate with the results of measuring isotope penile blood flow (IPBF), and thus determine if CDI is a useful screening investigation for vasculogenic impotence. PATIENTS AND METHODS: The ...
Sattar A A - - 1996
PURPOSE: Nocturnal penile tumescence monitoring was compared to penile duplex ultrasonography and pharmaco-infusion cavernosometry in 50 cases of erectile dysfunction. MATERIALS AND METHODS: Nocturnal penile tumescence was evaluated in all patients as normal or abnormal according to standard general criteria. The results were compared to penile duplex ultrasonography parameters (peak ...
Guerrero F - - 1996
Carotid blood flow in rats was measured by implanted transit-time ultrasonic flowprobes throughout hyperbaric experiments conducted up to 70 bar (7 MPa) with a helium-oxygen hyperoxic (PO2 = 400 mbar) mixture. Before the hyperbaric experiment, an intracerebroventricular (ICV) injection of phosphate saline-buffered solution (PBS) or adenosine deaminase (ADA, 100 U.ml-1) ...
Tarhan F - - 1996
Recent studies have shown an important role for nitric oxide (NO) in cavernous smooth muscle relaxation. In this study the intracavernosal effects of the NO donor sodium nitroprusside (SNP) were investigated in 32 patients with erectile dysfunction. Erectile response and penile blood flow were investigated following intracavernosal administration of 360 ...
Bosshardt R J - - 1995
OBJECTIVES: To determine the efficacy and possible beneficial effects of the Catalyst vacuum device (VD) in the treatment of impotence, the ischaemic state of the penis after application of a constriction ring and the origin of the blood in the corpus cavernosum after application of the VD. PATIENTS AND METHODS: ...
Kiely M E - - 1995
Apomorphine HCl (Apo) (0.5 mg sc), but not placebo, induced an erectile response (monitored with a mercury strain gauge) lasting 40 min in an impotent hyperprolactinemic patient. Serial blood sampling modified the 40 min erectile response. Prompt detumescence followed by complete or partial restoration of tumescence occurred each time blood ...
Myers D E - - 1995
Oxygen inhalation was early advocated as a treatment for migraine headache. It has been theorized that the efficacy of raising blood oxygen levels in vascular headache is mediated by vasoconstriction and metabolic effects. Hyperbaric oxygen can provide a much greater level of blood oxygenation than can provide a much greater ...
Verrazzo G - - 1995
For many years, clinical practice has consolidated the use of both hyperbaric oxygen and oxygen-ozone therapy in the treatment of peripheral occlusive arterial disease (POAD). We investigated the influence of these treatments on hemorrheologic parameters that play an important role in the pathogenesis and the clinical course of arteriosclerosis. Two ...
Guerrero F - - 1995
Carotid blood flow was measured in rats by implanted transit-time ultrasonic flowprobes during hyperbaric experiments at up to 70 bar (7 MPa) using an helium-oxygen hyperoxic (partial pressure of O2 = 400 mbar) mixture. Before the hyperbaric experiment, an intracerebroventricular injection of phosphate saline buffered solution (PBS) or aminophylline, an ...
Siraj Q H - - 1994
Arteriogenic impotence is a major cause of organic erectile dysfunction. We evaluated the diagnostic value of quantitative radionuclide phallography with intravenous pharmacological stress in screening impotent patients for penile arterial inadequacy. Using technetium-99m labelled autologous erythrocytes, dynamic scintigraphy of the penile blood pool was performed. Penile haemodynamic changes following intravenous ...
Braisted J C - - 1994
Exposure to hyperbaric O2 (0.6 MPa) until convulsion occurred resulted in increased red blood cell osmotic fragility, increased hematocrit, and acidosis. Correction of the mixed metabolic and respiratory acidosis in arterial blood samples completely restored osmotic fragility and lowered hematocrit by 20%. Rats exposed to intermittent hyperbaric O2 (repeated cycles ...
Uhl E E Institute for Surgical Research, Ludwig-Maximilians University, Munich, - - 1994
The influence of hyperbaric oxygen on reepithelialization and on microvascular perfusion of wounds in normal and ischemic skin tissue was investigated by using a standardized model, in ears of hairless mice. Animals were treated within 2 hours of wound creation and then twice daily with 100% oxygen at 2 atmospheres ...
Lin J S - - 1994
Penile hypercoagulability during erection may predispose to aging vascular changes and, eventually, arteriogenic impotence. The relationship of penile blood thromboxane B2 and 6-keto-prostaglandin F1 alpha in both psychogenically and arteriogenically impotent patients after intracavernosal treatment with papaverine plus phentolamine or prostaglandin E1 was evaluated. No significant change in penile blood ...
Dewan P A - - 1994
Priapism in childhood is most commonly a low-flow state due to sickle cell anemia. A high-flow priapism was seen in a 7-year-old boy following a straddle-injury-induced arteriocavernosal fistula. Penile aspiration, intracorporeal alpha-agonist injection and unilateral arterial embolization failed to resolve the priapism which eventually settled following a cavernosaphenous shunt.
van der Kleij A J - - 1994
Microcirculatory hemodynamics of the skin during hyperbaric oxygenation were assessed by determination of nailfold capillary red blood cell velocity (Vrbc). Under hyperbaric conditions a continuous increase in Vrbc was found. Control values, 0.43 +/- 0.12 mm. sec-1 (mean +/- sem), were significantly (P < 0.05) lower compared with Vrbc at ...
Moriel E Z - - 1993
Cavernosal smooth muscle relaxation, one of the primary events in penile erection, is initiated by the synthesis and release of nitric oxide (NO) from the neurons of the cavernosa. The present study was undertaken to determine whether or not serum levels of NO metabolites rise during an erection. Since NO ...
Gutierrez P - - 1993
A consecutive series of 52 men presenting with erectile dysfunction were assessed with (i) standardized sexual history, (ii) nocturnal penile tumescence and rigidity monitoring (NPTR), (iii) Rigiscan assessment of response to intracavernosal papaverine or prostaglandin injection (ICI), and (iv) duplex ultrasonography. Subjects were categorized into 'organic', 'psychogenic' or 'uncertain' on ...
Torbati D - - 1993
Newborn mammals, compared to adults, are extremely resistant to the CNS effects of hyperbaric oxygenation (HBO) induced by excessive generation of reactive oxygen species. This tolerance to HBO may be related to either physiological responses or the chemical characteristics of the immature brain, including a low cerebral blood flow and ...
Katlowitz N M - - 1993
Twenty-five patients underwent audiovisual sexual stimulation (AVSS) after pharmacologically-induced erection. Grade of erection and cavernosal blood flow were assessed after intracorporeal (IC) injection of TRI-MIX or prostaglandin E1, and then after AVSS, using pulsed Doppler ultrasonography (PDUS). After IC injection, 5 patients had a Grade II erection, 8 had Grade ...
Duffy L K - - 1993
Significant differences in levels of blood haptoglobin occurred between river otters (Lutra canadensis) inhabiting oiled (mean = 361 mg/100 ml, SD = 38, n = 6) and nonoiled (mean = 306 mg/100 ml, SD = 87, n = 8) areas of Prince William Sound, Alaska (USA) following the Exxon Valdez ...
OlszaƄski R - - 1994
A case of heavy carbon monoxide poisoning is reported, with disorders in the central nervous system and circulatory disturbances (brain oedema), disfunction of the cardiac muscle and of platelet haemostasis). The level of carboxyhaemoglobin was over 45%. The patient was given hyperbaric treatment at 0.15 MPa (2.5 ATA). On the ...
Narkowicz C K - - 1993
It has been postulated that exposure to high concentrations of oxygen results in increased oxygen radical production which may account for the toxic effects of excessive exposure to oxygen. Examination of blood from persons undergoing hyperbaric oxygen (HBO) exposure, by low temperature electron spin resonance (ESR) spectroscopy, demonstrated a marked ...
Golias J C - - 1992
This papers explores the effects of traffic stream flows on accident potential at urban priority-controlled (i.e. unsignalized), four-arm junctions. Forty-three urban priority junctions were carefully selected so that other than flow parameters expected to influence accident potential have similar values at the junctions considered. Using traffic accident data for five-year ...
Siraj Q H - - 1992
The change in the cavernous hematocrit following induction of pharmacological erection by an intracavernous injection of papaverine hydrochloride was documented in normal controls and patients with impotence. Blood samples taken from the penile cavernosa showed a significantly lower hematocrit compared to the systemic venous blood in all normal subjects. The ...
Weaver L K - - 1992
This study demonstrates the ability of an automated blood gas analyzer (Radiometer ABL 330) operated at atmospheric pressure to measure the arterial oxygen tension (PaO2) of ten healthy volunteers exposed to hyperbaric oxygen (HBO2) up to 3.0 atmospheres absolute. Arterial blood samples were aspirated from subjects compressed in a single-person ...
Dutka A J - - 1992
BACKGROUND AND PURPOSE: Victims of air embolism often recover rapidly on hyperbaric treatment then deteriorate again, even if hyperbaric treatment is continued. In previous animal experiments, lidocaine has been shown to improve recovery of somatosensory evoked response amplitude after air embolism. However, animals in these experiments rarely deteriorated. We have ...
Siraj Q H - - 1992
Radionuclide phallography was performed using 99Tcm-labelled red blood cells in conjunction with pharmacologically induced penile erections. The radioactivity content of aliquots of systemic venous blood taken from the antecubital vein was compared with aliquots of blood withdrawn from the penile cavernosa 20 min after an intracavernosal injection of 10 micrograms ...
Meuleman E J - - 1992
Alternations of penile blood flow are believed to be the most frequent organic cause of erectile dysfunction. Penile duplex ultrasonography following intracavernous injection of a vasoactive agent is an accepted method for diagnosis of penile vascular dysfunction. To determine the diagnostic efficacy of commonly used vasoactive drugs we studied the ...
Kim S C - - 1992
The levels of catecholamines in penile blood during a papaverine test were measured to investigate whether the secretion of endogenous catecholamines is involved in response to intracorporeal papaverine injection. The level of norepinephrine was higher in patients with psychogenic impotence than in the normal controls and patients with vasculogenic impotence ...
Zuckier L S - - 1992
Nuclear medicine techniques may be used to test fallopian tube patency and penile vascular inflow and outflow. Radionuclide hysterosalpingography (HSP) is a readily performed method of evaluating fallopian tube patency, and is believed to be more physiologic and functionally informative than the accepted radiologic method of contrast HSP. The test ...
Grech P - - 1992
The investigation of vascular impotence requires a simple, reliable and non-invasive method of estimating penile arterial supply. A method for measuring flow to the dependent portion of the penis has been developed using technetium-labelled red blood cells (99mTc-RBC). Its use, in conjunction with the intracavernous injection of papaverine, was investigated ...
Dutka A J - - 1992
Dexamethasone is often recommended as an adjunct to recompression in the treatment of serious central nervous system decompression accidents. We studied the effects of prophylactic and therapeutic administration of dexamethasone combined with hyperbaric treatment in anesthetized dogs that were subjected to carotid air embolism and a brief episode of arterial ...
Viljoen I M IM Department of Urology, University of the Orange Free State, - - 1992
Marked changes in penile skin blood flow following intracavernosal injection of papaverine were observed in 14 subjects. Increased flow was more pronounced in those patients who failed to achieve erection or had poor erection than in those who responded with adequate erection. This observation may explain in part why papaverine ...
Muhvich K H - - 1992
The purpose of the study reported here was to characterize the effects of acute exposure to 100% oxygen at a pressure of 202.6 kPa on hemodynamics and organ blood flow in antibiotic-controlled bacterial sepsis. An abscess containing known numbers and strains of live Escherichia coli and Bacteroides fragilis was established ...
Meuleman E J - - 1992
Duplex ultrasonography is important in the diagnosis of vasculogenic erectile dysfunction. We measured the ultrasonographic parameters of cavernous blood flow in different phases of penile erection. We examined 44 volunteers with normal erectile potency. Doppler spectra of the cavernous artery were obtained in a time-dependent manner after intracavernous administration of ...
LaRouere M J - - 1992
Pentoxifylline, a phosphodiesterase inhibitor and hemorrheologic agent has been found to increase oxygen delivery to ischemic tissue. Intravenous pentoxifylline was administered to normal guinea pigs in order to assess the effect of pentoxifylline on cochlear blood flow and to elucidate its mechanism of action. Intravenous pentoxifylline was found to acutely ...
Watanabe H - - 1992
We measured penile blood flow during physiological erection using the Xenon-133 clearance method in order to diagnose the exact cause of impotence. In 16 patients, in whom complete erection was obtained after visual sexual stimulation, the mean penile blood flow during erection was apparently higher than that in the flaccid ...
De Bruin D - - 1991
The evaluation of arterial blood supply and venous drainage of the penis is essential in assessing the impotent male. The vaso-active drugs prostaglandin E1 and papaverine, as intracavernous injections, cause penile erections in humans by influencing the arterial blood supply and venous drainage. These drugs were used in the normal ...
Cavallini G - - 1991
A new type of topically applied drug (minoxidil) to facilitate erection is presented. Minoxidil acts directly on arterial smooth muscles via relaxation. This drug (1 ml. of a 2% solution) was studied under strict laboratory conditions in a double-blind controlled trial on 33 patients (4 with neurogenic plus arterial, 10 ...
Kromann-Andersen B - - 1991
Venous impotence can be evaluated by cavernosometry, although this is a controversial issue. We have evaluated various techniques for cavernosometry: with and without intracavernous papaverine, with different dosages and modalities, with different modes of induction flow and at various intracavernous pressures. A standardised technique was tested and retested in 32 ...
Hilson A J - - 1991
Impotence may be of physiological origin with causes including vascular or neurological pathology. Alternatively, it may be of psychogenic origin. Clinicians can distinguish between psychological and organic impotence by observing nocturnal penile tumescence. Non-radionuclide investigations for organic impotence include penile plethysmography or pulse Doppler analysis for arterial supply, cavernosometry for ...
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