• Korean Journal of Veterinary Research
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• v.42 no.1
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• pp.123-130
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• 2002

To investigate the cardiopulmonary and anesthetic effects of propofol in dogs, experimental dogs were randomly divided into 4 groups (propofol infusion anesthesia, P/INF, propofol intermittent anesthesia, P/INTER, propofol induction anesthesia, P/ISO, thiopental Na induction anesthesia, T/ISO) and monitored analgesic and anesthetic effects, recovery time, body temperature, heart rate, mean arterial pressure, respiratory rate, systolic and diastolic pressure. In all groups, apnea was not observed. In the P/INF group, the respiratory rate(RR) was slightly decreased, but in the P/INTER group, RR was increased and shallowing. In the groups of P/ISO and T/ISO, the respiratory rate was decreased. Heart rate(HR) was increased after induction anesthesia in all groups, but gradually decreased. Mean arterial pressure(MAP) was decreased after injection anesthesia in the groups of P/INF and P/INTER. In the groups of P/ISO and T/ISO, however, MAP was slightly increased. Systolic and diastolic arterial pressure were gradually decreased after induction anesthesia, but not significantly. In the groups of P/INF and P/ISO, recovery time was shorter than the groups of P/INTER and T/ISO. In all groups, body temperature of animals was decreased gradually according to time but no significant changes were observed. Propofol injection doesn't make the complete loss of responses of animals, especially, in the P/INTER group. In the P/INF group, deep pain was present until the end of anesthetic period. During recovery period, any other side effects except incoordination were not monitored. The present study suggested that infusion anesthesia was superior to intermittent anesthesia as injection anesthetic agent, and propofol was better than thiopental Na as induction anesthetic agent.

• Journal of The Korean Dental Society of Anesthesiology
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• v.9 no.1
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• pp.9-16
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• 2009

Background: This study aimed to evaluate the cooperative levels of dental patients requiring general anesthesia during dental treatments. Anesthetic induction methods for patients were also recorded and analyzed using descriptive statistics. Methods: Total 566 patients who visited Seoul National University Dental Hospital Clinic for Persons with Disabilities were reviewed on pre-anesthetic review and anesthesia records. The cooperative levels of patients were graded by 4 levels and induction methods used for the patients during general anesthesia application were analyzed. Results: More than half of patients(55.8%) were willing to receive the anesthetic induction(cooperative level 1), 18.6% were minimally cooperative(level 2), 20.8% needed physical restraint prior to induction(level 3), and 4.8% was poorly cooperative and induction procedure was performed under an unconscious condition after ketamine intramuscular injection(level 4). There was no gender difference in cooperative levels(P=0.11). Patients over 30 years revealed better cooperation levels compared to other age groups(P<0.05). For patients of level 1, 53.5% were anesthetized in a way of intravenous induction, while 77.1% out of patients of level 3 were anesthetically induced through inhalation method. Conclusion: Many dental patients with special needs were not cooperative to receive anesthetic induction. Additional behavioral support may be applied to poorly cooperative patients for the safe and successful clinical outcome.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.50 no.6
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• pp.824-828
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• 2017

We investigated the anesthetic effects of MS-222 (tricaine methanesulfonate), clove oil, 2-phenoxyethanol, $NaHCO_3$, lidocaine-HCl and lidocaine-$HCl/NaHCO_3$ in the glass catfish Kryptopterus vitreolus. Based on the efficacy criteria of complete anesthetic induction from 60 s to 120 s, recovery within 300 s, the lowest effective concentrations at $24^{\circ}C$ were determined to be 60 ppm (induction $82.8{\pm}17.6s$, recovery $80.2{\pm}34.7s$) for MS-222, 40 ppm (induction $70.5{\pm}8.2s$, recovery $83.4{\pm}17.7s$) for clove oil, 250 ppm (induction $64.3{\pm}24.0s$, recovery $62.8{\pm}15.6s$) for 2-phenoxyethanol, 300 ppm (induction $127.3{\pm}13.3s$, recovery $107.5{\pm}4.8s$) for lidocaine-HCl and 200/100 ppm (induction $81.2{\pm}17.2s$, recovery $98.3{\pm}19.7s$) for lidocaine-$HCl/NaHCO_3$. Thus, 200/100 ppm of lidocaine-$HCl/NaHCO_3$ was found to be an effective anesthetic agent.

• Journal of Sericultural and Entomological Science
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• v.13 no.2
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• pp.123-133
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• 1971

The author is the first man who tried to use an anesthetic on insect specially for silkworm in orde to evaluate the silkworm health and silk yielding ability and the obtained results are as followings. 1. The necessary ether vapor induction for narcosis on silkworms is varied by the glowth of the silkworm which the larger worm is, the longer induction is required. For instance, it was 2∼3 minutes for the worms of third day fifth instar silkworm in case use of ether anesthetic. 2. The longer anesthetic induction for silkworms, the longer recovery needs from anesthesia. In case five minutes ether vapor induction, silkworms recovered narcosis during in 5∼130 minutes which had varied very much by the health variation. 3. The ether induction caused silkworm to vomit digestive juice from a few per cent of the worms, but the chloroform induction showed majority of the worms to vomit the digestive juice out of mouth. So, the ether was found as better anesthetic for silkworms. 4. When ether induction last more than 20∼30 minutes, the recovered silkworms can eat mulberry, but when it gets more than three hours they can not eat mulberry. And when it last more than ten minutes, the silkworm may eat mulberry leaf, but they can not spinn cocoon properly. 5. In case five minutes ether induction for silkworms on third day fifth instar, the stronger variety is, the rallier recovered from narcosis. 6. The recovering duration from narcosis varies regarding with each worm health which shows Poisson′s distribution even in a same variety silkworm. 7. The female worms recover from narcosis earlier than male worms which means the female worm is stronger than male one. 8. The later recovered silkworm from narcosis spinned more rich cocoon silk and ended with smaller pupae weight. Such a tendency showed until at some recovery duration, then the silk yield droped down on the worms recovered in more longer duration. The author (Choe) had named such a relation curve as "Silk Yield Curve against Silkworm Health." 9. The silk yield or cocoon layer ratio had varied from 13 to 27% even in a same worm varity cocoon which showed serious variation and call attention carefulness for the duplication work of a variety silkworm eggs. 10. Not always the rich silk yielding worm is the best worm during the silkworm selection and it should be considered with the silkworm health evaluation. 11. At present situation, only specific breeding expert is allowed to join in the selection service because of need many years experience by use of visual observation, but the ether anesthesia method may help such an evaluation with more accuracy and easy way even for the people in fresh on the field. 12. The effect of the narcosis on the silkworm for the next generation or hybrid worm will be reported in next publication.

• Journal of The Korean Dental Society of Anesthesiology
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• v.11 no.2
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• pp.125-132
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• 2011

Background: Adult patients with intellectual disabilities often strongly resist the anesthetic administration for dental procedures. This study aimed to evaluate the effect of midazolam premedication in improving the cooperation level of patients who are likely to be combative and irritated during general anesthesia (GA) induction. Methods: The patients who had received dental treatment under ambulatory GA for more than two times were included. And we selected 13 patients total that needed physical restraint or ketamine IM prior to induction at the first GA, and were prescribed midazolam tablet (7.5-15 mg) at the following GA. We reviewed pre-anesthetic records and anesthesia records, and evaluated cooperative levels of patients (4 levels scale) during anesthesia induction and recovery time retrospectively. Results: All 13 patients (Male 11, Female 2) had severe mental disabilities. The average age of the patients was 24 ${\pm}$ 7 (13-37) years and their average weight was 58 ${\pm}$ 16 (34-91) kg. At the first GA, 10 patients needed physical restraint prior to induction (level 3). And 3 patients were so poorly cooperative that the induction procedure was performed after intramuscular injection of ketamine (level 4). But after the midazolam intake, 7 patients were willing to receive the anesthetic induction (level 1, 2), and 6 patient needed physical restraint (P < 0.05). There were no statistical differences in the duration of general anesthesia and postoperative recovery. Conclusions: Oral intake of midazolam was effective in improvement of cooperation without any complications.

• Journal of Veterinary Clinics
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• v.34 no.2
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• pp.135-139
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• 2017

This study was performed to evaluate the clinical efficacy of alfaxalone for induction of inhalation anesthesia in small animal practice. Patient data were collected according to anesthetic records (136 dogs and 14 cats) presented to the Veterinary Medical Teaching Hospital of Seoul National University for surgeries and diagnostic imaging from July 2013 to March 2014. Anesthetic results included signalment, American Society of Anesthesiologists (ASA) grade, premedicated drugs, procedures, induction quality, and recovery after anesthesia. One hundred fifty anesthetic events were classified according to the ASA grade. Three patients were ASA grade I, 52 patients grade II, 86 patients grade III, and 9 patients grade IV, respectively. The most common premedication was midazolam and hydromorphone combination (n = 59, 39.3%) follow by acepromazine and hydromorphone combination (n = 22, 14.7%). The majority of anesthesia procedures were diagnostic imaging (n = 33, 22.0%) and ophthalmic surgeries (n = 31, 20.7%), followed by soft tissue surgeries (n = 27, 18.0%), and orthopedic surgeries (n = 20, 13.3%). Intravenous alfaxalone provided smooth induction for inhalation anesthesia in almost cases, but transient apnea and twitching/paddling were observed after induction and during recovery, respectively. In addition, alfaxalone did not show pain response during intravenous administration. Alfaxalone showed smooth induction of inhalation anesthesia in dogs and cats with mild to severe systemic disease (ASA 2-4). Alfaxalone was considered as an acceptable induction agent for patients with higher risk in small animal practice.

• Journal of Dental Anesthesia and Pain Medicine
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• v.15 no.3
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• pp.129-134
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• 2015

Background: We hypothesized that ketamine, when administered as the anesthetic induction agent, may prevent cardiovascular depression during high-dose remifentanil administration, unlike propofol. To test our hypothesis, we retrospectively compared the hemodynamic effects of ketamine, during high-dose remifentanil administration, with those of propofol. Methods: Thirty-eight patients who underwent oral surgery at the Nagasaki University Hospital between April 2014 and June 2015 were included in this study. Anesthesia was induced by the following procedure: First, high-dose remifentanil ($0.3-0.5{\mu}g/kg/min$) was administered 2-3 min before anesthesia induction;next, the anesthetic induction agent, either propofol (Group P) or ketamine (Group K), was administered. Mean arterial pressure (MAP) and the heart rate were recorded by the automated anesthesia recording system at four time points: immediately before the administration of high-dose remifentanil (T1);immediately before the administration of propofol or ketamine (T2);2.5 min (T3), and 5 min (T4) after the administration of the anesthetic induction agent. Results: In Group P, the MAP at T3 ($75.7{\pm}15.5mmHg$, P = 0.0015) and T4 ($68.3{\pm}12.5mmHg$, P < 0.001) were significantly lower than those at T1 ($94.0{\pm}12.4mmHg$). However, the MAP values in the K group were very similar (P = 0.133) at all time points. The heart rates in both Groups P (P = 0.254) and K (P = 0.859) remained unchanged over time. Conclusions: We showed that ketamine, when administered as the anesthetic induction agent during high-dose remifentanil administration, prevents cardiovascular depression.

• Journal of The Korean Dental Society of Anesthesiology
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• v.14 no.1
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• pp.57-62
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• 2014

Background: The aim of this study was to analyze outpatient anesthesia for dental treatment in handicapped patients with behavior disorder in order to use data for carrying out better and safe anesthetic management. Methods: The data were drawn from the 100 patients with behavior disorder who visited CNUDH dental clinic for disabled based on anesthesia record to investigate patient's systemic condition, cooperative level, anesthesia method according to patients cooperation, and side effects after recovery time. Results: Mental retardation (58%) is the most reason to choose general anesthesia. The methods of induction according to cooperative level are intravenous propofol injection in 22 cases and inhalation of sevoflurane in 78 cases. Induction time of anesthesia were within 10 seconds in cases of propofol induction and average $48.8{\pm}18.5$ seconds in cases of inhalation induction. The time spent on dental treatment was average $3.2{\pm}1.1$ hours. After the end of treatment, average time to move from unit chair to recovery bed, to recliner, and to discharge from hospital are $10.4{\pm}5.1$, $36.9{\pm}17.1$ and $72.4{\pm}16.0$ minutes, respectively. During recovery, there are nausea with 9%, vomiting with 4%, dizziness with 2%, finger injury with 1%. Conclusions: This study showed our successful anesthetic outcomes without any severe side effects or complications. Through this study, it will be used for safe anesthetic management as useful reference data.

• Journal of the Korea Convergence Society
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• v.11 no.10
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• pp.349-353
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• 2020

Background: The dosage of the anesthetic drugs is generally determined by the total body weight of the patients. However, the drugs can be overdosed when the patient is morbidly obese. We have determined anesthetic induction dose based on lean body mass estimated from bioelectrical impedance analysis (BIA). Case: We report a case of morbidly obese patient (161 cm, 138 kg and body mass index 53.1) who had an elective laparoscopic cholecystectomy. The dose of induction agent was determined by lean body mass estimated by BIA, and the sedation was assessed by the observer's assessment alertness/sedation scale. Conclusions: Dose determination through lean body mass measured by BIA is useful in highly obese patients.

• Journal of Veterinary Clinics
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• v.34 no.4
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• pp.234-240
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• 2017

Use of ketamine and propofol combination (so-called Ketofol) anesthesiain a fixed ratio (1:1 mg/ml) was reported in dogs. The use of ketofol reduced cardiovascular suppression, but respiratory-related side effects was not significantly different from propofol alone. In this study, we evaluated the quality of ketofol anesthesia and changes in cardiopulmonary function according to the ratio of ketamine to propofol. The experimental groups were divided into three groups: propofol alone (P group), 3:7 ketofol group (PK1 group) and 1:1 ketofol group (PK2). For each group, the dose of 0.8 ml/kgwas administered intravenously at a constant rate until the tracheal intubation was possible and anesthesia was maintained with isoflurane for 120 minutes after induction of anesthesia. There was no significant difference in the anesthetic quality among three groups. Also, there was no difference in respiratory rate, tidal volume, end-tidal carbondioxide, and oxygen saturation. In group P, heart rate was not changed significantly during anesthesia, but arterial blood pressure decreased, while heart rate and arterial blood pressure increased significantly in group PK2. In the PK1 group, heart rate and arterial blood pressure during anesthesia remained similar to pre-anesthetic values. In conclusion, ketofol might be used as induction agent, and 3:7 ratioof ketofol showed more safe and effective anesthetic effect in dogs. Additionally, 1:1 ketofol may be used in patients with severe bradycardia orhypotension with close monitoring during anesthesia.