• 약학회지
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• 제47권2호
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• pp.78-84
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• 2003

Local anesthetics are used to reduce pain, but they are so frequently injected to patients. So, we prepared lidocaine solid lipid microspheres (SLM) as long acting abdominal injection using spray drying method and evaluated drug entrapment, particle size, SEM, zeta potential and in vitro and in vivo drug release pattern, The particle sizes of SLM were 30∼100$\mu$m and it is enough to inject into abdominal tissue. The entrapment efficiency of SLM was over 95％ as spray drying method. Surfactant and PC decreased the burst effect by 20∼30％. In in vivo test, C-6 showed controlled release concentration profile in plasma for 8 days and C-5 sustained longer than we expected.

• Journal of Dental Anesthesia and Pain Medicine
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• 제20권3호
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• pp.173-178
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• 2020

We experienced a case of induction of general anesthesia without using neuromuscular blocking agents (NMBAs) in a 40-year-old woman with a history of anaphylaxis immediately after the administration of anesthetics lidocaine, propofol, and rocuronium to perform endoscopic sinus surgery 2 years before. The skin test showed a positive reaction to rocuronium and cis-atracurium. We induced general anesthesia without using NMBAs after inducing airway anesthesia with lidocaine (transtracheal injection and superior laryngeal nerve block). Deep general anesthesia was maintained with end-tidal 4 vol% sevoflurane. Hypotension was treated with phenylephrine infusion. The operation condition was excellent, and patient recovered without complications after surgery. Airway anesthesia with local anesthetics may be helpful when we cannot use NMBAs for any reason, including hypersensitivity to NMBA and surgery that needs neuromuscular monitoring.

• The Korean Journal of Physiology and Pharmacology
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• 제3권1호
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• pp.69-74
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• 1999

Both direct and indirect environmental stress to brain were increase the expression of transcription factor c-fos in various populations of neurons. In this study, we examined whether the intraperitoneal injections of lidocaine at doses inducing convulsion within 10 min increased the level of c-fos mRNA and protein in forebrain areas. In situ hybridization using $[^{35}S]UTP-labeled$ antisense c-fos, cRNA increased c-fos mRNA levels though hippocampal formation, piriform cortex, septum, caudate-putamen, neostriatum, and amygdala within 2 hr. In parallel with the mRNA expression, c-FOS protein immunoreactivity was also observed in the same forebrain areas. In contrast to the seizure activity and widespread neuronal degeneration following a kainate treatment, injections of lidocaine did not produce neuronal death within 3 days. The present study indicates that lidocaine induces convulsion and c-fos expression without causing neurotoxicity.

• Restorative Dentistry and Endodontics
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• 제40권2호
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• pp.155-160
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• 2015

Objectives: Achieving adequate anesthesia with inferior alveolar nerve blocks (IANB) is of great importance during dental procedures. The aim of the present study was to assess the success rate of two anesthetic agents (bupivacaine and lidocaine) for IANB when treating teeth with irreversible pulpitis. Materials and Methods: Sixty volunteer male and female patients who required root canal treatment of a mandibular molar due to caries participated in the present study. The inclusion criteria included prolonged pain to thermal stimulus but no spontaneous pain. The patients were randomly allocated to receive either 2% lidocaine with 1:80,000 epinephrine or 0.5% bupivacaine with 1:200,000 epinephrine as an IANB injection. The sensitivity of the teeth to a cold test as well as the amount of pain during access cavity preparation and root canal instrumentation were recorded. Results were statistically analyzed with the Chi-Square and Fischer's exact tests. Results: At the final step, fifty-nine patients were included in the study. The success rate for bupivacaine and lidocaine groups were 20.0% and 24.1%, respectively. There was no significant difference between the two groups at any stage of the treatment procedure. Conclusions: There was no difference in success rates of anesthesia when bupivacaine and lidocaine were used for IANB injections to treat mandibular molar teeth with irreversible pulpitis. Neither agent was able to completely anesthetize the teeth effectively. Therefore, practitioners should be prepared to administer supplemental anesthesia to overcome pain during root canal treatment.

• Journal of Dental Anesthesia and Pain Medicine
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• 제21권1호
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• pp.61-69
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• 2021

Background: Inferior alveolar nerve block (IANB) using lidocaine 2% is commonly used for anesthetizing primary mandibular molars; however, this technique has the highest level of patient discomfort compared to other local anesthesia techniques. Therefore, alternative anesthesia techniques are necessary. The aim of this study was to evaluate the efficacy of a single buccal infiltration of 4% articaine with IANB using 2% lidocaine, for the bilateral extraction of primary mandibular molars. Methods: The present study was conducted on 30 patients aged between 6 and 9 years, who required the extraction of bilateral primary mandibular molars. The patients were randomly divided into two groups as follows: In the first session, Group A received IANB with lidocaine 2% and group B received infiltration with articaine 4%. In the second session, another injection method was performed on the opposite side. The Wong-Baker Facial Pain scale (WBFPS), Face Leg Activity Cry, and Consolability (FLACC), and physiologic parameters were used to assess pain perception. Results: The independent t-test showed no statistically significant difference in blood pressure and heart rate before and after extraction (P > 0.05). The mean FLACC index in the lidocaine and articaine groups was 0.89 and 1.36, respectively; there was no statistically significant difference between them (P > 0.05). According to the results of the chi-square test, there was no statistically significant difference between the groups for WBFPS (P > 0.05). Conclusion: The articaine infiltration technique may be an alternative to the IANB for the extraction of primary mandibular molars.

• Journal of Oral Medicine and Pain
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• 제38권2호
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• pp.161-174
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• 2013

이 연구는 저작근 통증 환자에게 Morphine을 주사하였을 때의 조절 효과를 확인하기 위해서 시행되었으며, 경희대학교 치과대학병원 구강내과에 내원한 환자 중 RDC/TMD로 근막통증으로 진단된 환자들이 지원하였다. 실험군은 총 네 군으로 구성되었으며 saline 주사군, lidocaine 주사군, morphine 1.5mg 주사군, morphine 3.0 mg 주사군에 각각 10명씩 배정하였다. 통증부위에 주사 전, 주사 후 1시간, 24시간, 48시간에 각각 주관적인 통증 평가인 시각유추척도검사, 맥길통증설문지검사 그리고 통증부위표시검사와 객관적인 통증 평가인 압력통증역치검사와 압력통증한계검사를 실시하였다. 검사 후 평가된 자료를 통계 처리하여 다음과 같은 결과를 얻었다. 1. 주관적인 통증평가에서 morphine 3 mg 군은 48시간 후 통계학적으로 유의성 있는 효과가 있었다.(VAS: p<0.01, MGQ: p<0.001, PD: p<0.05) 2. 객관적인 통증평가에서 morphine 1.5 mg 군은 1시간 후 통계학적으로 유의성 있는 효과가 있었다.(PPT: p<0.01, PPTol: p<0.05) 3. 맥길통증설문지에서 lidocaine 군, morphine 1.5 mg 군 그리고 morphine 3 mg 군은 모두 처치 후 1시간부터 효과가 있었으나 상대적으로 morphine 3 mg 군에서 통계학적으로 유의성 있게 더 큰 효과가 있었다.(1h: p<0.01, 24h: p<0.01, 48h: p<0.001) 이상의 연구 결과로 저작근에 통증이 있는 환자에게 morphine 주사 시 주관적인 평가에서 48시간 후 통증 조절 효과가 있었고, morphine 3 mg이 더 효과가 있었으며, 향후 시간 연장에 따른 지속적인 추가 연구가 필요 할 것으로 생각된다.

• Journal of Dental Anesthesia and Pain Medicine
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• 제22권4호
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• pp.305-314
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• 2022

Introduction: This clinical trial aimed to evaluate the anesthetic effect of the addition of 2 mg (4 mg/ml) of dexamethasone to 2% lidocaine (plain or with 1:80,000 epinephrine). The solutions were injected for a primary inferior alveolar nerve block (IANB) to provide mandibular anesthesia for the endodontic treatment of mandibular molars with symptomatic irreversible pulpitis. Methods: In a double-blinded setup, 124 patients randomly received either of the following injections: 2% lidocaine with 1:80,000 epinephrine, 2% lidocaine with 1:80,000 epinephrine mixed with 2 mg dexamethasone, or plain 2% lidocaine mixed with 2 mg dexamethasone, which were injected as a primary IANB. Ten minutes after injection, patients with profound lip numbness underwent electric and thermal pulp sensibility tests. Patients who responded positively to the tests were categorized as "failed" anesthesia and received supplemental anesthesia. The remaining patients underwent endodontic treatment using a rubber dam. Anesthetic success was defined as "no pain or faint/weak/mild pain" during endodontic access preparation and instrumentation (HP visual analog scale score < 55 mm). The effect of the anesthetic solutions on the maximum change in heart rate was also evaluated. The Pearson chi-square test at 5% and 1% significance was used to analyze anesthetic success rates. Results: The 2% lidocaine with 1:80,000 epinephrine, 2% lidocaine with 1:80,000 epinephrine mixed with 2 mg dexamethasone, and plain 2% lidocaine mixed with 2 mg dexamethasone groups had anesthetic success rates of 34%, 59%, and 29%, respectively. The addition of dexamethasone resulted in significantly better results (P < 0.001, 𝛘² = 9.07, df = 2). Conclusions: The addition of dexamethasone to 2% lidocaine with epinephrine, administered as an IANB, can improve the anesthetic success rates during the endodontic management of symptomatic mandibular molars with irreversible pulpitis.

• 기본간호학회지
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• 제2권1호
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• pp.37-43
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• 1995

This study was conducted to compare the severity of cannulation pain in hemodialysis patients after topical application of EMLA cream and local injection of lidocaine and evaluated side effects and problems accompanied by the former. Twenty patients, who were on hemodialysis from September 1 to October 15, 1994 at the Kangnam St. Mary's Hospital, Catholic University Medical College, were divided into two groups of ten. To conduct a cross over study, two groups were placed on four repeated methods with lidocaine followed by four repeated methods with EMLA cream and vice versa, respectively, while the severity of cannulation pain was being measured according to a Visual Analogue Scale with each methods. The results are follows : 1) The scale of pain was recorded as $4.56{\pm}1.38$ and $2.05{\pm}1.36$ points for methods with lidocaine and EMLA cream, respectively, indicating the less severe pain with EMLA cream. 2) Local side effects such as itching(4 cases, 5.0%)and pallor (5 cases, 6.3%)were observed with methods with EMLA cream but disappeared before the completion of hemodialysis. 3) Problems associated with local lidocaine were pain at the injection of anesthetic (27cases, 16.9%)and fear for needle insertion(6 cases, 3.8%). The most frequent problems with EMLA cream application were an inconvenience in use (11 cases, 6.9%)and tedious long pretreatment time(11 cases, 6.9%), those associated with inconvenience in cream applying procedures. 4) Twelve out of twenty patients(60.0%) responded with yes to a continued use of EMLA cream in spite of problems with cream application and economical difficulties in purchasing. These results indicate that 5% EMLA cream used as a local anesthetic in hemodialysis significantly reduces cannulation pain and lacks side effects, thus serving as a suitable method for the alleviation of cannulation pain and inconvenience in hemodialysis and the relief of psychological stress of nurses.

• Journal of Yeungnam Medical Science
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• 제6권2호
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• pp.57-62
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• 1989

지연성 호흡저하의 위험성이 없으며 중추신경계에 작용하는 혈압강하제인 Clonidine을 경막외강으로 주입한 강우의 진통효과를 알아보고자 미추마취를 시행할 항문질환 환자 40명을 대상으로 I군(1.33% Lidocaine 15ml)과 II군(1.33% Lidocaine 15ml+Clonidine $75{\mu}g$.)으로 나누어 수술후 진통효과를 관찰해 보았던 바 다음과 같은 결론을 얻었다. 1. Lidocaine단독 주입한 I군에서는 평균 마취시간이 2.42시간이었다. 2. Clonidine $75{\mu}g$을 혼합 주입한 II군의 경우에는 평균 진통시간이 7.32시간이었다. 3. Clonidine을 혼합 주입한 미추마취경우에 진정제 정주로 환자가 수면상태로 된 후 심한 혈압강하 및 맥박감소가 있었으나 Clonidine의 효과인지 진정효과에 인한 변화인지는 알 수 없었으며 진정제를 투여하지 않은 경우에는 혈압강하 및 맥박 감소가 초래되지 않았다. 4. 수술후 Clonidine과 관련된 특별한 증상은 관찰되지 않았다. 이상의 결과로 보아 항문질환 수술후 특히 외래환자의 차원에서 술후 진통을 위한 방법으로는 지연성 호흡저하 및 뇨정체등의 부작용이 없는 Clonidine의 천골강내 투여방법이 바람직한 것으로 사료된다.

• Journal of Dental Anesthesia and Pain Medicine
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• 제18권3호
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• pp.143-149
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• 2018

Background: We evaluated the changes in mean arterial pressure (MAP) and heart rate (HR), and the anesthetic and hemostatic effects, after injection of 2% lidocaine containing various concentrations of epinephrine in rats and mice to determine the appropriate concentration of epinephrine in various anesthetic mixtures. Methods: Rats and mice were randomly allocated to experimental groups: 2% lidocaine without epinephrine (L0), 2% lidocaine with epinephrine 1:200,000 (L200), 1:100,000 (L100), and 1:80,000 (L80). Changes in MAP and HR after administration of the anesthetic mixture were evaluated using a physiological recording system in rats. Onset and duration of local anesthesia was evaluated by pricking the hind paw of mice. A spectrophotometric hemoglobin assay was used to quantify the hemostatic effect. Results: MAP increased in response to epinephrine in a dose-dependent manner; it was significantly higher in the L80 group than in the L0 group at 5 min post-administration. The HR was relatively lower in the L0 group than in the L80 group. The time required for onset of action was < 1 min in all evaluation groups. The duration of action and hemostatic effect of the local anesthetic were significantly better in the L200, L100, and L80 groups than in the L0 group. Conclusion: L200 demonstrated relatively stable MAP and HR values with satisfactory efficacy and hemostatic effect. L200 might be a better local anesthetic for dental patients in terms of anesthetic efficacy and safety.