No abstract available.
Thioacetamide*

The purpose of this study was to investigate the characteristics or the potassium channels existing in the rat urinary bladders. Smooth muscle strips of rat detrusor urinae were examined by isometric myography. Relaxation responses of detrusor muscle strips to the three potassium channel openers pinacidil, a cyanoguanidine derivative, BRL 38227, a benzopyran derivative and RP 52891, a tertrahydrothiopyran derivative were examined. The potassium channel openers reduced the basal tone, and the rank order of potency was RP 52891>pincidil>BRL 38227. Procaine, an inhibitor of the voltage-sensitive potassium channel tended to increase the basal tone, but it did not affect the relaxant effects of the calcium-activated potassium channel opener did not antagonize the relaxant effects, but it reduced the Emax of RP 52891 and BRL 38227. Glibenclamide, an inhibitor of the ATP-sensitive potassium channel, antagonized the relaxant effects of pinacidil, RP 52891 and BRL 38227 reducing the Emax of RP 52891 and BRl 38227. Galanin which inhibits secretion of insulin through opening the ATP-sensitive potassium channels in pancreatic β-cells rather increased the basal tone of the isolated detrusor strips. These results suggest that the urinary bladder of the rat has mainly the ATP-sensitive, glibenclamide sensitive potassium channel, which is a different type from that in the pancreatic β-islet cells.
Animals ; Cromakalim ; Galanin ; Glyburide ; Insulin ; KATP Channels ; Muscle, Smooth ; Myography ; Pinacidil ; Potassium Channels* ; Potassium Channels, Calcium-Activated ; Potassium* ; Procaine ; Rats* ; Relaxation ; Urinary Bladder

This study was aimed at investigation of the stimulatory innervations on the rat urinary bladder. Detrusor muscle strips of 15 mm long were suspended in isolated muscle chambers containing 1 ml of PSS maintained at 37℃ and aerated with 95% O²/5% Co². Isometric myography was performed, and the results were as followings: Muscle strips showed “on-contraction” by electric field stimulation (EFS) frequency-dependently. The EFS-induced contraction was not affected by hexamethonium, a ganglion blocker, but abolished by tetrodotoxin, a nerve conduction blocker. Physostigmine, a cholinesterase inhibitor enhanced the EFS-induced contraction which was inhibited by hemicholinium, an inhibitor of choline uptake at the cholinergic nerve ending. Such an EFS-induced contraction was antagonized by atropine only partially, and the atropine-resistant portion was completely abolished by the desensitization of purinergic receptors by prolonged incubating of the strips in the presence of high concentration of ATP. Bethanechol, a cholinergic agonist, elicited concentration-dependent contraction. Adenosine triphosphate (ATP), a purinergic agonist, induced a weak but concentration-dependent contraction of short duration. Bethanechol-induced contraction was not affected by ATP-desensitization, and ATP-induced contraction was not affected by tetrodotoxin. These results suggest that there are at least two main stimulatory components of innervations in the detrusor muscle, cholinergic muscarinic and purinergic; and those receptors are independent each other.
Adenosine Triphosphate ; Animals ; Atropine ; Bethanechol ; Choline ; Cholinergic Agonists ; Cholinesterases ; Ganglion Cysts ; Hemicholinium 3 ; Hexamethonium ; Myography ; Nerve Endings ; Neural Conduction ; Physostigmine ; Rats* ; Receptors, Purinergic ; Tetrodotoxin ; Urinary Bladder*

Purpose: The purpose of this study was to investigate hospital nurses’ delirium screening for postoperative delirium, delirium knowledge, and delirium care using case scenarios at a tertiary hospital in Seoul. Methods: A total of 235 nurses working at surgical units participated in this questionnaire-based study. Five cases scenarios were developed based on diagnosed postoperative delirium cases. Data were collected from April 1 to May 1, 2021. Results: The delirium screening score was 4.20±1.17 out of 5. The delirium knowledge score was 34.35±4.57 out of 47. The delirium care score was 67.61±9.26 out of 92. The correlation between the delirium screening and delirium knowledge was statistically significant (r=.18, p=.005). The correlation between the delirium knowledge and delirium care was statistically significant (r=.25, p<.001). Conclusion The findings showed that the continuing educations of delirium for hospital nurses and the development of a delirium education programs were important to improve delirium screening and care.

This study aimed to investigate the mechanism of action of baclofen on the detrusor muscle isolated from rat. Rats (Sprague-Dawley) were sacrificed by decapitation and exsanguination. Horizontal muscle strips of 2 mm x 15mm were prepared for isometric myography in isolated muscle chamber bubbled with 95% / 5%-OZ / CO2 at 371C, and the pH was maintained at 7.4 Detrusor strips. contracted responding to the.. electrical field stimulation (EFS) by 2 Hz, 2U msec, monophasic square wave of 60 VDC. The initial peak of EFS-Induced contraction was tended to be suppresed by a,p-methylene-adenosine 5'-triphosphate (mATP), a partial agonist of purinergic receptor, and baclofen, a GABAB receptor agonist (statistically nonsignificant). The late sustained contraction by EFS was suppressed significantly (p < 0.05) by additions of atropione, a cholinergic muscarinic receptor antagonist and baclofen. The adenosine 5'-triphosphate-induced contraction was completely abolished by mA TP but not by baclofen. In the presence of atropine, the subsequent addition of acetylcholine could not contract the muscle strips: but the addition of acetylcholine in the presence of baclofen evoked a contraction to a remarkable extent.
Acetylcholine ; Adenosine ; Animals ; Atropine ; Baclofen* ; Decapitation ; Exsanguination ; Hydrogen-Ion Concentration ; Myography ; Rats* ; Receptors, Muscarinic

This study was designed to investigate factors related to recovery from cerebrovascular accidents(CVA). Medical charts of 100 CVA patients(40 males and 60 females) who had been treated at Bul-Guang hospital in Teagu from June to December 1994 were reviewed to assess their recovery from CVA. Not only types of CVA, blood pressure and serum cholesterol and triglyceride were factors affecting recovery from CVA, but also smoking and drinking status and food preference seemed to be important factors. The percentages of recovered patients were higher in the order of cerebral thrombosis(83.3%), subarachnoid hemorrhage(57.1%), cerebral embolism(50.0%), and cerebral hemorrhage(26.7%). Recovery rates of patients with serum cholesterol below 200mg/dl, 200-239mg/dl, over 240mg/dl were 81.8%, 66.6%, and 16.6% respectively. Recovery rates of patients with serum triglyceride below 160mg/dl, 160-209mg/dl, and oover 210mg/dl were 84.6%, 72.8%, and 35.7% respectively. Patients with standard weight recovered better than those with overweight or obesity. Recovery rates of underweight, standard weight, overweight and obesity patients were 73.3%, 85.7%, 45.8%, and 31.6% respectively. Smoking and drinking seemed to be important factors which inhibited recovery from CVA. Patients preferring spiced foods were recovered better than those preferring salty or pungent foods.
Blood Pressure ; Cholesterol ; Drinking ; Food Preferences ; Humans ; Male ; Obesity ; Overweight ; Smoke ; Smoking ; Spices ; Stroke* ; Thinness ; Triglycerides

Vocal cord dysfunction is a recently described entity in which paradoxical adduction of the vocal cords produces airflow obstruction at the level of the larynx. Recurrent wheezing results, which may imitate asthma. Inspiratory closure of the cords can also cause stridor, commonly misdiagnosed as an upper airway obstruction of undefined cause. The acute presentation is often dramatic and has led to inappropriate treatment, including intubation, tracheotomy, or high doses of steroids. We present the case of a 9 yr old boy with allergic rhinitis who was referred to us for the evaluation of wheezing and dyspnea which did not respond to asthma management. Pulmonary function tests had abnormal inspiratory phases and laryngoscopy revealed typical adduction of the vocal cord during inspiration. Psychological tests suggested anxiety and tension with repressed aggression. There have been no further episodes, possibly due to counseling and education of relaxed throat breathing as well as avoidance of inhaled medication.
Aggression ; Airway Obstruction ; Anxiety ; Asthma ; Counseling ; Dyspnea ; Education ; Humans ; Intubation ; Laryngoscopy ; Larynx ; Male ; Pharynx ; Psychological Tests ; Respiration ; Respiratory Function Tests ; Respiratory Sounds ; Rhinitis ; Spirometry ; Steroids ; Tracheotomy ; Vocal Cord Dysfunction* ; Vocal Cords*

PURPOSE: The purpose of this study was to investigate the welfare status of nurses and the status of fixed night shifts and flexible work arrangements in both general hospitals and advanced general hospitals in Korea. METHODS: A total of 167 hospitals participated in this study, done from April to October 2018. RESULTS: There were 103 hospitals utilizing the fixed night shift system, 22 in the two-shift system, 3 in the fixed holiday shift, 79 in the fixed shift system, and 39 in the short-time working system. The average welfare benefits for nurses increased to 33.02 million won on average. However, welfare services for the nurses were poor: 41.8% of the respondents had a nurses' lounge, 81.7% were given dormitory space at their place of employment, 41.8% had access to welfare facilities, and 56.4% were provided with welfare support countermeasures. CONCLUSION: The results show an increasing trend of hospitals to utilize fixed night shift and flexible work arrangements. An institutional strategy at the national policy level should be established to implement flexible work arrangements including the fixed night shift system, which has a poor level of welfare.
Employment ; Holidays ; Hospitals, General ; Korea ; Surveys and Questionnaires

PURPOSE: iNOS expression in vascular smooth muscle cells (VSMC) causes the development of septic shock, and multiple organ dysfunction syndrome (MODS). For the inhibition of iNOS expression, glucocorticoids are known to inhibit iNOS expression but immunosuppression decreases its clinical availability. Recently, aspirin was reported to inhibit iNOS expression, but the mechanism and effectiveness are still unclear. In this investigation, on aspirin, several non steroidal antiinflammatory drugs (NSAIDs) were applied to clarify the inhibitory mechanism of iNOS expression and NO production in lipopolysaccharide (LPS) treated VSMCs. METHOD: VSMCs were primarily cultured from rat aorta and confirmed by immunocytochemistry of anti-smooth muscle myosin antibody. LPS, an inducer of iNOS, and NSAIDs, such as aspirin, indomethacin, ketoprofen sodium salicylate and acetaminophen were used. The concentrations of nitrite in culture media following the addition of LPS with a 1-hour pretreatment of NSAIDs were measured by spectrophotometry with griess reaction. Western blot and RT-PCR for iNOS protein and iNOS mRNA, respectively, were performed. RESULT: Acetaminophen had no effect on the inhibition of nitrite production. NSAIDs, especially ketoprofen and sodium salicylate, showed a significant inhibitory effect on nitrite production. In their mechanism, all the NSAIDs in present study inhibited iNOS mRNA and protein expression. CONCLUSION: These results suggest that the inhibitory mechanism on iNOS expression of NSAIDs is due to the inhibition of iNOS mRNA expression and subsequent inhibition of iNOS protein expression.
Acetaminophen* ; Animals ; Anti-Inflammatory Agents, Non-Steroidal* ; Aorta ; Aspirin ; Blotting, Western ; Culture Media ; Glucocorticoids ; Immunohistochemistry ; Immunosuppression ; Indomethacin ; Ketoprofen ; Multiple Organ Failure ; Muscle, Smooth, Vascular* ; Myosins ; Rats ; RNA, Messenger ; Shock, Septic ; Sodium Salicylate ; Spectrophotometry

To increase retinal blood flow, we attempted to increase blood flow of ophthalmic artery which in the major vascular supply to the eyeball. The authors evaluated changes in blood flow of ophthalmic artery and retinal capillary after compression of superficial temporal artery. In 5 normal healthy subjects, the superficial temporal artery was compressed for 10seconds and the blood flow was measured with color doppler imaging and Heidelberg Retinal Flowmeter(HRF). After compression, the mean volume of ophthalmic artery was increased by 59.3% and the mean change of diastolic velocity was significantly increased by 29.6%. Systolic velocity did not changing significantly. For evaluation of retinal microcirculation, we measured volume, flow, velocity in retina and optic nerve head. The relative ratio in changes of volume, flow, velocity were 87.9%, 91.5%, 92.6%, in retina respectively and 110.1%, 140.7%, 139.5%, respectively in optic nerve head. These significant changes were not statistically(P>0.05). In 5 diabetic patients with damaged autoregulatory mechanism, the relative ratio in changes of volume, flow, velocity were 114.25%, 118.30%, 117.6%, respectively. These changes were not statistically significant(P>0.05). Our results indicate that the increase of blood flow in ophthalmic artery by compressing superficial temporal artery did not increase retinal blood flow.
Capillaries ; Humans ; Microcirculation* ; Ophthalmic Artery ; Optic Disk ; Retina ; Retinaldehyde ; Temporal Arteries*