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PubMed2006

Reduction of image artifacts in mice by bladder flushing with a novel double-lumen urethral catheter.

In electron paramagnetic resonance imaging (EPRI), the accumulation of contrast agent in the bladder can create a very large source of signal, often far greater than that of the organ of interest. Mouse model images have become increasingly important in preclinical testing. To minimize bladder accumulation on mouse images, we developed a novel, minimally invasive, MRI/EPRI-friendly procedure for flushing a female mouse bladder. It is also applicable to other imaging techniques, for example, PET, SPECT, etc., where contrast agent accumulation in the bladder is also undesirable. A double-lumen urethral catheter was developed, using a standard IV catheter with a silicone tube extension, having a polyethylene tube threaded into the IV catheter. Flushing of the bladder provides a substantial reduction in artifacts, as shown in images of tumors in mice.

Administration, Intravesical↗

PubMed1991

Heparin-flush associated thrombocytopenia--induced hemorrhage: a case report.

Thrombocytopenia is a well known complication of heparin. It occurs when heparin is used in full therapeutic dose or in subcutaneous mini-doses for prophylaxis. This has also been reported with minuscule dose of heparin used in heparin-flushes to keep vascular access catheters patient. We are reporting for the first time, a case of severe hemorrhage due to thrombocytopenia associated with heparin flushes.

Aged↗

PubMedDate not supplied

Increased perioperative lung preservation injury with lung procurement by Euro-Collins solution flush.

In 47 donor organ procedures for heart-lung transplantations, lungs were preserved by autoperfusion in 21 cases and by Euro-Collins solution flush in 26 cases. Criteria used to diagnose inadequate allograft function included radiographic interstitial and alveolar infiltrates and an alveolar-arterial oxygen gradient significantly greater than 100 mm Hg at 24 hours after surgery. Oxygen gradients were calculated intraoperatively, on arrival in the intensive care unit, and during the first 24 hours after surgery. With these criteria, 15 patients with perioperative preservation damage were identified. They were compared with 32 patients without evidence of preservation injury. Patients with preservation injury showed persistently elevated alveolar-arterial oxygen gradients that were significantly above noninjury values at all times (p less than 0.03). There was no difference in donor organ ex vivo time between the two groups (227.8 +/- 74.4 vs 169.5 +/- 76.9, p = NS). The incidence of perioperative preservation injury was significantly greater among patients in the Euro-Collins solution group (12/26) than in patients with autoperfusion (3/21) (p = 0.04, Fisher's exact test). Three of the 15 recipients died of primary lung graft failure. In our hands, preservation by use of a modified Euro-Collins solution flush technique has led to unpredictable results in lung transplantation.

Adolescent↗

PubMed1991

Thrombotic side-effects of lower limb venography. The use of heparin-saline flush.

In a prospective study of 256 postoperative patients, bilateral lower limb venography was performed using meglumine iothalamate followed by heparin-saline flushing of the deep veins, and the complications of the procedure were assessed. No patient developed clinical evidence of deep-vein thrombosis after the venogram. In 117 patients fibrinogen uptake was performed 24 hours after the venogram. A new positive area on the uptake scan developed in 3 patients (2.6%). Local swelling or haematoma at the injection site occurred in 15 patients (5.9%), cellulitis in 2 (0.8%) and minor contrast reactions in 6 (2.3%). There were no major reactions and no procedure-related mortality. The reasons for the wide variation in the reported incidence of post-venogram thrombosis are considered and the importance of heparin-saline flushing of the deep veins to prevent this complication is discussed.

Adult↗

PubMed1977

[Elucidation of the mechanism of nicotinic acid flush in the animal experiment (author's transl)].

The reddening of the ears of guinea pigs following the administration of nicotinic acid and its derivatives is regarded as an animal experiment for the human flush-reaction. In agreement with the observations in humans we found that the reddening effects decreased after repeated administration of xantinol nicotinate (Complamin). The results demonstrate that the reddening of the ears of guinea pigs--and presumably flushing in humans as well--is a complex event. The liberation of prostaglandins, histamine and serotonin, and first of all, cholinergic reactions, seem to be involved.

Adrenergic beta-Antagonists↗

PubMed1989

[Pathogenetic mechanisms of the development of "hot flushes" in patients with climacteric disorders of the sympathetic-adrenal type].

Examinations of 19 patients aged 49 to 55, suffering from climacteric disorders of sympathoadrenal nature, have revealed during 42 hot flushes an activation of the sympathoadrenal section of the autonomic nervous system (increased arterial pressure, heart and respiration rates, and skin galvanic reflex), as well as activation of peripheral vasodilatation, elevated skin temperature, and increased concentrations of LH, ACTH, thyrotropic hormone (TTH), cortisol, aldosterone, and testosterone. These data suggest that the trigger mechanism of a hot flush in the patients with the climacteric syndrome represents modified (due to changes in the external or internal conditions) activity of the LH releasing factor-secreting neuron structures and of the central temperature-sensitive neurons. Activation of the sympathoadrenal section of the autonomic nervous system and of the hypothalamo-hypophyseo-adrenocortical system is explained by their important role in the adaptive reactions of the body. Increase of the TTH level results from increased activity of the thyrotropin releasing factor, contributing to the central mechanisms of thermoregulation.

Adrenal Glands↗

PubMed1989

[Ureteral flushing].

Flushing back stones of the lumbar or iliac ureter towards the renal cavities by means of a catheter is now part of everyday practice. The ureteric flush-back technique is often easily performed when the appropriate equipment is used wisely. We used a 23 Ch cystoscope with a 5 degrees lens to work in the axis of the ureter and a 7 Ch catheter with a single orifice is advanced as far as the stone. In 30% of cases, the stone immediately ascends as far as the renal cavities due to ureteric distension. In the case of failure, rapid injections of physiological saline with a syringe are successful in 40% of cases. In 10% of cases, success depends on progressive hydraulic distension of the ureter above the stone following injection of physiological saline.

Cystoscopy↗

PubMed1989

[Flushing of obstructive ureteral calculi].

Management of obstructive upper ureteral calculi by first flushing the lithiasis to renal cavity and secondary extracorporeal lithotripsy is proposed as a routine guide-line, especially when treatment by ESWL is not immediately available. It that purpose a procedure is described allowing to flush calculi in all the cases, even if enclosed by oedema, dilated or flexible ureter.

Humans↗

PubMed1986

[The menopause. Vasomotor flushing: physiopathology and treatment].

Considered for a long time as an unavoidable phenomenon secondary to a sudden reduction in hormones, the vaso-motor flushes of menopause have generated, these past few years, a renewal of interest for two reasons: 1) A better knowledge of the etiological mechanisms and experimental and therapeutic observations lead to believe at the present time that their origin is at a central level (hypothalamus) with upsetting of the balance of the cerebral neuro-transmitters; this upsetting seems to be the common mechanism of occurrence of the sudden flushes and the hormonal disorders observed during this phenomenon. 2) The possibility to use (beside the classical hormonal means) non hormonal products, especially Veralipride, which acts directly at the level of the cerebral neuro-transmitters.

Animals↗

PubMedDate not supplied

Flush perfusion using Euro-Collins solution vs cooling by means of extracorporeal circulation in heart-lung preservation.

Single-flush perfusion using modified Euro-Collins solution and donor cooling by extracorporeal circulation represent two concepts of lung preservation currently in use for on-site heart-lung transplantation. The question of which technique is better for safe clinical application of heart-lung transplantation, including extended periods of ischemia and distant organ procurement, currently remains undetermined. Eighteen mongrel dogs, divided in three groups, underwent left lung, heterotopic heart transplantation, leaving the right lung and heart of the recipient in place. Donor organs were obtained from size-matched dogs. In all groups, myocardial preservation was achieved using 10 ml/kg cold potassium cardioplegia. Following flush perfusion of the lung (Euro-Collins solution, 60 ml/kg), six dogs were immediately transplanted (group I). Using the same preservation, organs were stored for 6 hours at 4 degrees C in group II. In group III, organs were cooled using extracorporeal circulation until reaching a rectal temperature of 16 degrees C, harvested, and thereafter stored as in group II. After transplantation, blood supply of the donor heart was assured by selective drainage of the superior vena cava into the right side of the donor heart. Outflow was obtained by end-to-side anastomosis of donor and recipient aorta. The dogs were kept anesthetized, and both lungs were ventilated selectively with an FiO2 of 0.4 for 20 hours or until death. During the postoperative course, the donor heart pumped about one third of the entire cardiac output in all groups. The lowest pulmonary vascular resistance of the transplanted lung was observed in group III. Oxygenation of the transplanted lung revealed no impairment in group I compared with the pretransplant values. By contrast, groups II and III showed a slight decrease of oxygenation within acceptable limits. We therefore conclude that both methods of cardiopulmonary preservation evaluated may allow for an extended ischemic time of up to 6 hours before heart-lung transplantation. Pulmonary vascular resistance was significantly lower in the group preserved by extracorporeal circulation, possibly reflecting superior preservation of lung function by this method.

Animals↗

PubMed1987

A no-flush, core-cooling technique for successful cardiopulmonary preservation in heart-lung transplantation.

In order to determine whether a no-flush, core-cooling technique could provide extended heart-lung preservation, we placed donor calves on cardiopulmonary bypass and instituted rapid cooling to 15 degrees C during the continuous infusion of isoproterenol. The heart and lungs were harvested after the administration of a cardioplegic solution through the aortic root. In the control group (N = 5), heart and lungs were orthotopically allotransplanted immediately. In the preserved group (N = 5), heart and lungs were similarly excised but were stored in a normal saline bath at 4 degrees C for approximately 4 hours and then transplanted. Both groups received isoproterenol during reperfusion and were studied for 6 hours after implantation. A load independent analysis of myocardial function was done by determining with a sonomicrometer the ratio of the end-systolic pressure to the end-systolic dimension. Pulmonary preservation was evaluated by measurement of extravascular lung water with a double-indicator dilution method, arterial oxygenation on 100% inspired oxygen, and serial lung biopsies. Myocardial and pulmonary function after 4 hours of static preservation was found to be similar to controls. No-flush, core-cooling with cardiopulmonary bypass provides adequate cardiorespiratory function after acute bovine heart-lung allotransplantation. With the use of this technique, successful extended cold ischemic cardiopulmonary preservation for heart-lung transplantation may be achieved.

Animals↗

PubMed1988

Effects of the dopamine antagonist veralipride on hot flushes and luteinizing hormone secretion in postmenopausal women.

The effects on hot flushes of the dopamine antagonist Veralipride versus placebo were investigated in a randomized double-blind study of postmenopausal healthy women (N = 20 in each group). Cutaneous temperature recording and plasma LH pulsatility were studied in eight patients from each group. Veralipride administration (100 mg/day for 30 days) induced a significant (P less than .01) reduction in vasomotor symptoms and was more effective (P less than .05) than placebo. Treatment was followed by the expected increase (P less than .001) in plasma prolactin levels and by a significant decrease (P less than .05) in mean plasma LH. A significant reduction (P less than .01) was observed in objectively recorded hot flushes after Veralipride treatment, whereas there was no significant change in the characteristics of LH pulsatility. Infusion of the opioid antagonist naloxone (N = 5) induced a significant (P less than .01) increase in LH secretion after Veralipride administration. These results suggest that the endogenous opioid system may mediate the endocrine and clinical effects of long-term Veralipride treatment.

Climacteric↗

PubMed1987

Endoscopic flushing electrocoagulation for upper gastrointestinal bleeding--an alternative to surgery.

Twenty-three patients, mean age of 65 years, planned for emergency surgery because of upper gastrointestinal bleeding, were electrocoagulated with an endoscopic Storz monopolar flushing electrode. Nineteen patients were managed successfully. Two out of twelve patients with gastric ulcer and both patients with gastrojejunal ulcer bleeding needed an operation. The overall success rate was 82% and the mortality was 9%. According to this study endoscopic monopolar flushing liquid electrocoagulation is a good alternative to surgery in upper gastrointestinal bleedings except gastrojejunal ulceration.

Adult↗

PubMed1985

Temperature changes suggestive of hot flushes in rhesus monkeys: preliminary observations.

To determine if changes in skin temperature known to accompany hot flushes in women also occur in monkeys, temperature recordings were made in three adult rhesus monkeys before and after ovariectomy and in one postmenopausal female. Increases occurred especially on the skin of the ear pinna, with greater frequency following ovariectomy. This animal model may be suitable to investigate the mechanism which causes hot flushes in women.

Aging↗

PubMed1979

Flushing syndrome due to mahimahi (scombroid fish) poisoning.

Scombroid fish poisoning, one of the most common adverse reactions to fish, is also probably one of the most common causes of a flushing syndrome. The reaction usually involves fishes of the Scombridae family but, in Hawaii, the reaction is most often due to mahimahi (Coryphaena hippurus). Onset of the reaction is usually abrupt and commonly associated with a prominent flush resembling a sunburn. Headache, tachye to a toxin with histamine-like properties, which is formed because improper refrigeration enables endogenous bacteria to decarboxylate histidine normally present in dark-meat fishes. Symptoms are usually promptly relieved by parenteral antihistamine therapy.

Adult↗

PubMed1980

[A new therapeutic approach to menopausal sudden flushes and psychofunctional disorders (author's transl)].

A group of 78 women with sudden flushes and associated disorders (pruritus vulvae, headache, anxiety, instability, depression, libido disturbances) related to the menopause were treated with one or two capsules of veralipride daily for 20 days. Excellent or good results were obtained in 54 of the 69 patients (78 p. cent) with sudden flushes, and 29 of the 57 cases (51 p. cent) with associated disorders. The difference in scores before and after treatment is very highly significant (p < 0.001). Clinical tolerance was good as only 2 cases of minimal galactorrhea. 2 cases of mastodynia, 3 cases with mild drowsiness, 2 patients with nervous tension or insomnia, 3 with digestive disorders, 1 with vertigo, and 1 with mild visual disturbances were observed. No modifications in the biological parameters studied were noted. Blood prolactin levels increased during treatment but returned to normal levels 4 days after discontinuation of therapy. No significant modifications in FSH, LH, E2, or E3 plasma levels were noted at the end of the study. Veralipride appears, therefore, to be the prototype for non-hormonal therapy of menopausal disorders.

Adult↗

PubMed1982

Attempts to isolate bovine leukemia and bovine syncytial viruses from blood, uterine flush fluid, unfertilized ova and embryos from infected donor cattle.

Blood leucocytes, sediments of uterine flush fluid (UFF), eggs and embryos from 25 BLV-positive donor cows were tested for bovine leukemia (BLV) and bovine syncytial (BSV) viruses by cocultivation with fetal lamb spleen cells and by applying syncytium induction and immunofluorescence tests. BLV was diagnosed in 11/15 (73.3%) leucocyte and 4/25 (16.0%) UFF-sediment specimens as compared to BSV in 14/15 (93.3%) and 21/25 (84.0%) of the similar specimens and neither BLV or BSV were found in 26 eggs and 60 embryos collected from 20 of the 25 cows. Detection of BLV antigens by immunofluorescence was hampered by the competitive replication of both BLV and BSV and competitive growth in indicator cells and uterine cells. As BLV has not been observed in cells of UFF sediments, it was probably isolated from leucocytes present in the lumen of uterus or from blood seeping out from inapparent vessel damage during flushing. Isolation of BLV in UFF sediments gives additional evidence to the concept of a transplacental transmission by a not yet elucidated mechanism. The high rate of BSV recovery from cells of UFF sediments indicated that this virus is more wide-spread than previously shown and that it may play a role in causing disorders of the reproductive tract.

Animals↗

PubMed1983

Flushing treatments of subtropical ewes bred three times each within two years.

389 Ossimi ewes were given 45 days of flushing treatment with different protein levels (100%, 125%, and 150%) and different sources of protein (plant protein, fish meal, and urea) during a period of two years three weeks each before a mating season and with three breedings during that time. At high protein levels and application of plant protein higher live weight increases were achieved during the flushing period. The reproduction performance was not influenced. The conception rate improved with increasing protein treatments. Plant protein treatments gave better results in the conception rate, twinnings and lambings. September proved a better month for mating than did January and May. There was no significant influence of the age and the live weight of the ewes on the daily body weight gain and the reproductive performance of the ewes. Only the rate of twinning increased significantly with increasing live weight.

Animals↗