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  • 1
    Electronic Resource
    Electronic Resource
    350 Main Street , Malden , MA 02148-5018 , USA and 9600 Garsington Road , Oxford OX4 2DQ , UK . : Blackwell Science Inc
    Pacing and clinical electrophysiology 28 (2005), S. 0 
    ISSN: 1540-8159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Magnetic resonance imaging (MRI) is currently contraindicated in cardiac pacemaker (PM) recipients. The objectives of this prospective study were to (1) reassess the risks of performing an MRI scan in patients with PM, (2) compared the pacing functions before and after the exposure to MRI, and (3) monitor the development of possible adverse effects. Thirteen patients implanted with an Affinity™ DR model 5330 PMs (St. Jude Medical) connected to a Tendril™ model 1388 leads (St. Jude Medical) underwent 2.0 T-MRI for a variety of indications. All patients displayed a stable spontaneous rhythm at the time of the MRI scan and were not considered to be PM-dependent. The sensing and pacing functions were analyzed and the impedance of both leads was measured before and after the scan. The MRI scan was performed with all PM programmed in DDD mode. The sensing configuration was bipolar. All patients were monitored utilizing a standard electrocardiographic monitor and direct verbal communication. PM Inhibition, asynchronous pacing, or inappropriately rapid pacing was not observed. No patient reported discomfort, heat, or motion sensation at the PM implant site. There were no significant differences in the sensing, stimulation, AutoCapture® threshold, and lead impedance measurements before and after MRI. The results of this study suggest that performing 2.0 T-MRI scans in patients with Affinity™ DR model 5330 PM connected to a Tendril™ model 1388 lead is safe.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Anatomy and embryology 180 (1989), S. 103-108 
    ISSN: 1432-0568
    Keywords: Ultrastructure ; Gut ; Endocrine cells ; Testudo graeca ; Chelonia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The digestive tract of Testudo graeca (Chelonia) was investigated by means of electron microscopy using both conventional and immunocytochemical techniques. EC-, L-, D-, G-, B-, N- and EC-L-cells were detected. These cells share several common ultrastructural characteristics with the endocrine cells of mammals (i.e. clear cytoplasm, prominent Golgi apparatus, secretory granules etc.). EC and D1 cells have so far not been described in the esophagus of any animal species; in the present study these cells have been observed in the esophagus of T. graeca. Of special interest was the presence of B-cells in the intestine, suggesting that the migration of B-cells from the gut to the pancreas to constitute pancreatic islets is not concluded in T. graeca. The present study demonstrates that the gut endocrine system of T. graeca is a complex structure containing a large variety of endocrine cell types similar in morphology to those found in higher vertebrates.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-2218
    Keywords: Key words: Laparoscopic cholecystectomy—hemostasis—thromboembolic disease
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background: The aim of this work was to study hemostasis in laparoscopic cholecystectomy in order to determine if there are any changes that indicate a greater risk of thrombosis. Methods: The study was carried out in 20 patients who underwent laparoscopic surgery for noncomplicated cholelithiasis. The average age was 59.4 years (range, 34–77). A total of 75% were female. Mean operation time was 70 min (ranges 35–120). Pneumoperitoneum at 14 mmHg was performed on all patients, who were positioned in the 30° reverse Trendelenburg position. Postoperative mobilization was acheived in 24 hs and patients were discharged 48 hs after the operation. The control group was composed of 12 patients, who were evenly distributed by age, sex, and length of surgery. These patients underwent Bassini herniorraphy for inguinal hernia without any complications or relapse. The following hemostatic parameters were studied: prothrombin activity (PA), activated partial thromboplastin time (APTT), fibinogen (Fg), anti-thrombin III (ATIII), plasma fibrinolytic activity (PFA), euglobulin fibrinolytic activity (EFA), and D-dimer (D-D). Samples were obtained at the following times: (a) under basal conditions the day before surgery, (b) preoperatively, (c) at the end of the operation, (d) 24 hs after the operation, and (e) On the 7th day following the operation. Results: No patient showed any clinical manifestations of thromboembolic disease immediately after surgery or during a medium follow-up period of 16 months (range, 15–18 months). All hemostatic parameters values were within normal range in the basal samples of both groups. In both groups, the mean value of PA showed a significant decrease (p 〈 0.05) in the second, third, and fourth basal samples, returning to normal levels by the fifth determination. The mean value of fibrinogen decreased slightly in the second and third samples, increasing significantly with respect to the fourth and fifth determinations in both groups (p 〈 0.05). The mean value of APTT in both groups was slightly enhanced in the second and third determinations in relation to the first and fifth. The global activity of fibrinolysis (PFA and EFA) increased significantly in the third sample with respect to the other determinations in the group who had laparoscopic surgery (p 〈 0.005). Only EFA increased in the control group (p 〈 0.05). D-D decreased in the preoperative second determination followed by a significant enhancement immediate postoperatively (third), and 24 hs (fourth) (p 〈 0.05); it returned to normal basal values on the seventh day. No significant differences were found between the two groups. Conclusions: These results indicate that laparoscopic cholecystectomy leads to no greater activation of plasma coagulation than low-risk surgery. On the contrary, the increase of fibrinolytic activity in plasma would extend a certain degree of hypocoagulability during surgery, maintaining it for 24 hs and thus possibly reducing thromboembolic risk in patients undergoing this type of surgery.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-0878
    Keywords: Pulmonary neuroendocrine cells ; Serotonin ; Neuroepithelial bodies ; Argyrophil cells ; Reptiles (Lacerta lepida, Mauremys caspica, Pseudemys scripta elegans, Testudo graeca)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The distribution of serotonin-immunoreactive cells in the lung of 4 species of reptiles was investigated. Serotonin-containing cells were found forming groups in the interconnecting septa in all 4 species studied, and also as solitary cells in Testudo graeca and Mauremys caspica. Serotonin-containing cells were also localized in the intramural ganglia of Pseudemys scripta elegans and Testudo graeca. The present study confirms that serotonin is widely distributed in the lung of vertebrates.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1573-6865
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The glycoconjugates of the extrapulmonary airways of 11 tetrapode vertebrates have been characterized by means of both conventional and lectin histochemistry. Abundant sialosulphomucins were detected in the secretory cells and periciliary layer of turtles, snakes, birds and mammals while only sialomucins were observed in amphibians. Neutral and traces of acidic mucins were detected in the secretory cells of lizards. The secretory cells of the amphibian airways were reactive to Con-A, DBA and WGA. No α-l-fucose residues reactive with UEA-I or LTA were detected in amphibians. The goblet cells of the turtles were stained by DBA, SBA and WGA. Secretory cells of snakes and lizards reacted with Con-A and WGA. The mucous goblet cells of the birds were reactive to Con-A, LTA and WGA. In the chicken, they also showed affinity for PNA and SBA. The ciliated cells ofthe avian species studied were stained by Con-A and WGA. Mammalian goblet cells were reactive to Con-A, UEA-I and WGA. In the rat, affinity for DBA and SBA was also observed. The present results reveal the existence of marked differences in the sugar residues of the glycoconjugates of the extrapulmonary airways of tetrapode vertebrates. Only sialic acid residues appear to be constant constituents of the glycoconjugates of the airways of all species studied.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1573-6865
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A histochemical study was carried out on the glycoconjugates of the nasal mucosa of rat and guinea pig using conventional techniques and peroxidase-labelled lectins. Both the respiratory mucosa and neuroepithelium were studied. Sulphate and sialic acid groups were found in the mucous layer of the neuroepithelia, Bowman's glands and goblet cells. In contrast, the nasal glands did not possess these groups, and only a few showed neutral mucins. Carbohydrate residues were more numerous in the acini of the Jacobson glands. Thus, the nasal glands in the rat and guinea pig are probably of a serous type because of the scarcity of carbohydrate residues.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal of Morphology 212 (1992), S. 191-200 
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Study of the esophageal microscopic morphology of adult Rana perezi by light and electron microscopy discloses some large folds throughout the esophagus that are in themselves ringed. Glandular ostia open in the furrows of the luminal surface. The esophageal wall is made up of a connective adventitia rich in melanocytes, a muscular tunica, a connective and glandular subepithelial layer, and a pseudostratified ciliated epithelium. This epithelium basically consists of ciliated, goblet, basal, microvillous-apex, and migratory cells. Two types of goblet cells are distinguished with regard to the granular ultrastructure. The microvillous-apex cell has not been found in other amphibians. It shows a very differentiated morphology with a high number of mitochondria. The basal cells give the epithelium a pseudostratified morphology, and they have a proliferative function. Glands are branched and drain through an excretory duct that has a monolayered mucosecreting epithelium. The glandular units are formed by two principal types of cells: mucosecretory and serous. © 1992 Wiley-Liss, Inc.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal of Morphology 204 (1990), S. 235-245 
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The digestive tract of the tortoise Testudo graeca (Testudines) was investigated by means of light and electron microscopy. The esophagus of T. graeca was lined by two types of epithelium: non-keratinized stratified squamous in the upper portion and stratified columnar in the lower. The lamina propria of the esophagus contained tubular or tubuloacinar glands. The mucosa of the stomach showed similar characteristics to those of other reptiles. The small intestine exhibited longitudinal folds lined by absorptive and goblet cells. The large intestine was lined by columnar mucous cells. Within the lamina propria of the large intestine, masses of 10-15 epithelial cells connecting with the surface epithelium by means of slender cytoplasmic processes were observed. A battery of six lectins (Con-A, PNA, WGA, DBA, SBA, and LTA) was used to identify the epithelial mucins. WGA and DBA reacted with all types of mucous cells throughout the alimentary canal. PNA was only unreactive in the intestine, LTA in the esophagus, and SBA in the large intestine. These results indicate a similar lectin-binding pattern throughout the gut of T. graeca.
    Additional Material: 19 Ill.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Molecular Reproduction and Development 36 (1993), S. 84-88 
    ISSN: 1040-452X
    Keywords: Capacitation ; Triple stain technique ; Lectin ; Oocyte ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: Ejaculated spermatozoa from four different boars were used to evaluate the acrosome reaction during in vitro fertilization with homologous ovulated oocytes. The acrosome reaction was assessed according to a peroxidase-labeling peanut agglutinin method and a triple-stain technique. An increase in the proportion of living sperm with reacted acrosomes was observed after preincubation and 2 hr of coincubation (P 〈 0.05). The percentage of true acrosome-reacted sperm remained reasonably constant throughout coincubation. In vitro penetration rates of oocytes varied among boars, but no relationship was found between fertilization rates of oocytes and maximum percentages of acrosome reacted living sperm. © 1993 Wiley-Liss, Inc.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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