@article{HerbertHolzer1994, author = {Herbert, M. K. and Holzer, P.}, title = {Nitric oxide mediates the amplification by interleukin-1β of neurogenic vasodilatation in the rat skin}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-59969}, year = {1994}, abstract = {No abstract available.}, subject = {Medizin}, language = {en} } @article{HerbertSchmidt1992, author = {Herbert, M. K. and Schmidt, R. F.}, title = {Activation of normal and inflamed fine articular afferent units by serotonin}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-59952}, year = {1992}, abstract = {In cats anesthetized with alpha-chloralose, extracellular recordings were made from fine afferent units belonging to the medial articular nerve (MAN) of the knee joint. The excitatory and sensitizing effects on articular afferents of serotonin (5-HT) applied intra-arterially close to the joint were examined. The joints were either normal or an experimental arthritis had been induced some hours before the recording session. Bolus injections of 1.35-135 p,g 5-HT excited about 43\% of group 111 (CV: 2.5-20 m/sec) and 73\% of group IV units (CV: < 2.5 mjsec) from normal joints. The latency was usually between 10 and 30 sec, and the duration and size of the responses were dose-dependent. Fast group 111 units (CV: > 16 mjsec) and group li units (CV: > 20 m/sec) were never excited by 5-HT. Repetitiveadministration led to pronounced tachyphylaxis of the 5-HT response. Inflammation induced an enhanced sensitivity of group III articular afferent units to close intra-arterial application of 5-HT. In particular the total duration of each response was considerably prolonged (4-10 min against 1-2 min under normal conditions). At the same time the tachyphylaxis seen under normal conditions was gteatly reduced. In contrast, group IV articular afferent units did not become sensitized to 5-HT in the course of inflammation. In normal joints 5-HT did not sensitize fineafferent units for movement-induced responses. However, after inflammation, a distinct sensitization to such movements by 5-HT application could be observed bothin group 111 and group IV fiber ranges. The sensitization had a short time course not exceeding 7 min. The tonic component of the movement-induced response was more enhanced than the phasic one. The bolus application of 5-HT led to temporary vasoconstriction of the knee joint vessels. This vasoconstriction was especially pronounced in inflamed joints and impeded the access of subsequently applied substances to the terminal regions of the afferent units under observation. lt is concluded that the present results support the notion that 5-HT may participate in the mediation of pain from inflamed tissue such as an arthritic joint by exciting and sensitizing fine afferent units. During inflammation group 111 units are particularly sensitive to 5-HT and, thus, may carry the bulk of the 5-HT-induced nociceptive messages.}, subject = {Medizin}, language = {en} } @article{SchickIsbaryStueberetal.2012, author = {Schick, Martin Alexander and Isbary, Jobst Tobias and Stueber, Tanja and Brugger, Juergen and Stumpner, Jan and Schlegel, Nicolas and Roewer, Norbert and Eichelbroenner, Otto and Wunder, Christian}, title = {Effects of crystalloids and colloids on liver and intestine microcirculation and function in cecal ligation and puncture induced septic rodents}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-78151}, year = {2012}, abstract = {Background: Septic acute liver and intestinal failure is associated with a high mortality. We therefore investigated the influence of volume resuscitation with different crystalloid or colloid solutions on liver and intestine injury and microcirculation in septic rodents. Methods: Sepsis was induced by cecal ligation and puncture (CLP) in 77 male rats. Animals were treated with different crystalloids (NaCl 0.9\% (NaCl), Ringer's acetate (RA)) or colloids (Gelafundin 4\% (Gel), 6\% HES 130/0.4 (HES)). After 24 h animals were re-anesthetized and intestinal (n = 6/group) and liver microcirculation (n = 6/group) were obtained using intravital microscopy, as well as macrohemodynamic parameters were measured. Blood assays and organs were harvested to determine organ function and injury. Results: HES improved liver microcirculation, cardiac index and DO2-I, but significantly increased IL-1β, IL-6 and TNF-α levels and resulted in a mortality rate of 33\%. Gel infused animals revealed significant reduction of liver and intestine microcirculation with severe side effects on coagulation (significantly increased PTT and INR, decreased haemoglobin and platelet count). Furthermore Gel showed severe hypoglycemia, acidosis and significantly increased ALT and IL-6 with a lethality of 29\%. RA exhibited no derangements in liver microcirculation when compared to sham and HES. RA showed no intestinal microcirculation disturbance compared to sham, but significantly improved the number of intestinal capillaries with flow compared to HES. All RA treated animals survided and showed no severe side effects on coagulation, liver, macrohemodynamic or metabolic state. Conclusions: Gelatine 4\% revealed devastated hepatic and intestinal microcirculation and severe side effects in CLP induced septic rats, whereas the balanced crystalloid solution showed stabilization of macro- and microhemodynamics with improved survival. HES improved liver microcirculation, but exhibited significantly increased pro-inflammatory cytokine levels. Crystalloid infusion revealed best results in mortality and microcirculation, when compared with colloid infusion.}, subject = {Medizin}, language = {en} } @article{SchusterJohannsenRoewer2013, author = {Schuster, Frank and Johannsen, Stephan and Roewer, Norbert}, title = {A Minimal-Invasive Metabolic Test Detects Malignant Hyperthermia Susceptibility in a Patient after Sevoflurane-Induced Metabolic Crisis}, series = {Case Reports in Anesthesiology}, journal = {Case Reports in Anesthesiology}, doi = {10.1155/2013/953859}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-97080}, year = {2013}, abstract = {Malignant hyperthermia is a rare but life-threatening complication of general anesthesia in predisposed patients usually triggered by potent inhalation anesthetics and/or the depolarizing muscle relaxant succinylcholine. The authors present a case of delayed sevoflurane-induced malignant hyperthermia in a 21-year-old male patient that was sufficiently treated by discontinuation of trigger agent application and dantrolene infusion. After surviving an MH episode diagnostic procedures are indicated to increase patient safety. In the presented case, the use of a novel minimal-invasive metabolic test with intramuscular injection of halothane and caffeine successfully confirmed MH susceptibility and hence might be an alternative for invasive in vitro contracture testing in selected cases.}, language = {en} }