Communication with a noncooperative patient and his/her family / 의료커뮤니케이션

Difficult patients who meet in the clinic may have a negative effect on the patient’s clinical outcomes by leading to difficulties in history taking, relationship building, diagnosis and treatment. Factors that contribute to non-cooperative patients include physician factors, patient factors, environmental factors, and communication factors. In order to communicate with non-cooperative patients, efforts to prepare for interviews and build relationships, self-reflective attitudes, empathic listening, the use of preceptors or reflective teams, and the maintenance of identity as medical professionals should be emphasized. Multi-party conversations, including family members, may be difficult in patient interviews, and physician should check the emotional responses and expectations that families feel about patient care. Within a family, there are many hidden strengths that could become valuable resources for healing the patient. But they will most likely to come out when families are faced with challenges for which their present repertoire of responses seems inadequate. Health care providers can become a significant part of this process that can result in better patient care and rewarding relationships with families.

Anesthesiologist’s role as a communication coordinator of perioperative medicine: stressing the recognition of role in the changing medical atmosphere

Perioperative care process in a hospital is considerably complex, involving multiple subprocesses, healthcare professionals, and systems in support of surgical care. The perioperative process is often the primary source of hospital admissions, driving the dominant part of hospital margins and accounts for a major part of all adverse events occurring in hospitals. The recent trend stresses the importance of adopting patient-centered and quality-proven care in many medical fields. Further, the emphasis on changing from fee-for-service to fee-for-value is increasing. These changes present challenges to anesthesiologists who play a central role in perioperative medicine.Current Concepts: Anesthesiologists are in contact with many surgeons and patients and are positioned to improve clinical outcomes. They need to have up-to-date, evidence-based knowledges on perioperative clinical management and know-how to apply, organize and practice them into efficient pathways for optimal outcomes. To accomplish such purposes, anesthesiologists need to acquire communication skills to reason and convincing related personnel including surgeons and patients.Discussion and Conclusion: The recent changing climate of perioperative medicine calls upon anesthesiologists to acquire knowledges driving quality care and demands the application of communicative skills to accomplish the required tasks.

Anesthesiologist’s role as a communication coordinator of perioperative medicine: stressing the recognition of role in the changing medical atmosphere

Perioperative care process in a hospital is considerably complex, involving multiple subprocesses, healthcare professionals, and systems in support of surgical care. The perioperative process is often the primary source of hospital admissions, driving the dominant part of hospital margins and accounts for a major part of all adverse events occurring in hospitals. The recent trend stresses the importance of adopting patient-centered and quality-proven care in many medical fields. Further, the emphasis on changing from fee-for-service to fee-for-value is increasing. These changes present challenges to anesthesiologists who play a central role in perioperative medicine.Current Concepts: Anesthesiologists are in contact with many surgeons and patients and are positioned to improve clinical outcomes. They need to have up-to-date, evidence-based knowledges on perioperative clinical management and know-how to apply, organize and practice them into efficient pathways for optimal outcomes. To accomplish such purposes, anesthesiologists need to acquire communication skills to reason and convincing related personnel including surgeons and patients.Discussion and Conclusion: The recent changing climate of perioperative medicine calls upon anesthesiologists to acquire knowledges driving quality care and demands the application of communicative skills to accomplish the required tasks.

Performance of the MP570T pulse oximeter in volunteers participating in the controlled desaturation study: a comparison of seven probes

Background@#The performance of the pulse oximeter was evaluated based on the ISO 80601-2-61:2011 (E) guidelines. This study aimed to determine whether the various finger probes of the MP570T pulse oximeter (MEK-ICS Co., Ltd., Korea) would provide clinically reliable peripheral oxygen saturation (SpO2) readings over a range of 70100% arterial oxygen saturation (SaO2) during non-motion conditions. @*Methods@#Each volunteer (n = 12) was connected to a breathing circuit for the administration of a hypoxic gas mixture. For frequent blood sampling, an arterial cannula was placed in a radial artery. The following seven pulse oximeter probes were simultaneously attached to each volunteer’s fingers: (1) WA-100 reusable finger probe (MEDNIS Co., Ltd., Korea), (2) MDNA disposable finger probe (MEDNIS Co., Ltd.), (3) IS-1011 disposable finger probe (Insung Medical Co., Ltd., Korea), (4) CJ340NA disposable finger probe (CHUN JI IN Medical Co., Ltd., Korea), (5) NellcorTM OxiMax DS-100A reusable finger probe (Medtronic, USA), (6) NellcorTM OxiMax MAX-N disposable finger probe (Medtronic), and (7) OXI-PRO DA disposable finger probe (Bio-Protech Inc., Korea). @*Results@#A total of 275 SpO2-SaO2 pairs were included in the analysis. The accuracy of the root mean square (Arms) of each probe was 2.83%, 3.98%, 3.75%, 6.84%, 3.43%, 5.17%, and 3.84%, respectively. @*Conclusions@#The MP570T pulse oximeter with WA-100 reusable, MDNA disposable, IS-1011 disposable, NellcorTM OxiMax DS-100A reusable, and OXI-PRO DA disposable finger probes meets an acceptable standard of SpO2 accuracy under non-motion conditions.

Quantitative analysis of the effect of fraction ofinspired oxygen on peripheral oxygen saturation inhealthy volunteers

Background@#The international organization for standardization (ISO) 80601-2-61 dictates that the accuracy ofa pulse oximeter should be assessed by a controlled desaturation study. We aimed to characterize the relationshipbetween the fraction of inspired oxygen (FiO2) and peripheral oxygen saturation (SpO2) using a turnover modelby retrospectively analyzing the data obtained from previous controlled desaturation studies. @*Materials and Methods@#Each volunteer was placed in a semi-Fowler’s position and connected to a breathingcircuit to administer the hypoxic gas mixture containing medical air, oxygen, nitrogen, and carbon dioxide.Volunteers were exposed to various levels of induced hypoxia over 70-100% arterial oxygen saturation (SaO2).The study period consisted of two rounds of hypoxia and the volunteers were maintained in room air betweeneach round. FiO2 and SpO2 were recorded continuously during the study period. A population pharmacodynamicanalysis was performed with the NONMEM VII level 4 (ICON Development Solutions, Ellicott City, MD,USA). @*Results@#In total, 2899 SpO2 data points obtained from 20 volunteers were used to determine the pharmacodynamiccharacteristics. The pharmacodynamic parameters were as follows: kout = 0.942 1/min, Imax = 0.802, IC50 =85.3%, γ = 27.3. @*Conclusion@#The changes in SpO2 due to decreases in FiO2 well explained by the turnover model with inhibitoryfunction as a sigmoidal model.

Myoclonus of ipsilateral upper extremity after ultrasound-guided supraclavicular brachial plexus block with mepivacaine / 대한마취과학회지

No abstract available.

Exploring the pros and cons of mechanistic case diagrams for problem-based learning / 한국의학교육

PURPOSE: Mechanistic case diagram (MCD) was recommended for increasing the depth of understanding of disease, but with few articles on its specific methods. We address the experience of making MCD in the fullest depth to identify the pros and cons of using MCDs in such ways. METHODS: During problem-based learning, we gave guidelines of MCD for its mechanistic exploration from subcellular processes to clinical features, being laid out in as much detail as possible. To understand the students' attitudes and depth of study using MCDs, we analyzed the results of a questionnaire in an open format about experiencing MCDs and examined the resulting products. RESULTS: Through the responses to questionnaire, we found several favorable outcomes, major of which was deeper insight and comprehensive understanding of disease facilitated by the process of making well-organized diagram. The main disadvantages of these guidelines were the feeling of too much workload and difficulty of finding mechanisms. Students gave suggestions to overcome these problems: cautious reading of comprehensive texts, additional guidance from staff about depth and focus of mechanisms, and cooperative group work. From the analysis of maps, we recognized there should be allowance of diversities in the appearance of maps and many hypothetical connections, which could be related to an insufficient understanding of mechanisms in nature. CONCLUSION: The more detailed an MCD task is, the better students can become acquainted with deep knowledges. However, this advantage should be balanced by the results that there are many ensuing difficulties for the work and deliberate help plans should be prepared.

Successful use of C-MAC® video laryngoscope following failure of multiple intubation attempts during laryngomicroscopic surgery in an infant: A case report

A 6-month-old boy was scheduled for a laryngeal mass excision and tracheal bougienage for secondary subglottic stenosis. Following successful excision of the laryngeal mass, a tracheal tube was temporarily extubated for tracheal bougination. However, tracheal re-intubation using a direct laryngoscope with the Miller blade failed because of mucosal swelling and bloody secretions. Following multiple intubation attempts, the patient's peripheral oxygen saturation had decreased to 52%. Immediately, a video laryngoscope was requested, and, by using the C-MAC® video laryngoscope, the patient was successfully re-intubated. Because pediatric patients are more vulnerable to desaturation, extreme caution should be used in securing airways even during a short apneic period. Using a video laryngoscope at the first intubation attempt would be useful for successful tracheal intubation.

Successful use of C-MAC® video laryngoscope following failure of multiple intubation attempts during laryngomicroscopic surgery in an infant: A case report

A 6-month-old boy was scheduled for a laryngeal mass excision and tracheal bougienage for secondary subglottic stenosis. Following successful excision of the laryngeal mass, a tracheal tube was temporarily extubated for tracheal bougination. However, tracheal re-intubation using a direct laryngoscope with the Miller blade failed because of mucosal swelling and bloody secretions. Following multiple intubation attempts, the patient's peripheral oxygen saturation had decreased to 52%. Immediately, a video laryngoscope was requested, and, by using the C-MAC® video laryngoscope, the patient was successfully re-intubated. Because pediatric patients are more vulnerable to desaturation, extreme caution should be used in securing airways even during a short apneic period. Using a video laryngoscope at the first intubation attempt would be useful for successful tracheal intubation.

A Case of Successful Use of C-MAC® Video Laryngoscope in ‘Cannot Ventilate’ Situation Due to Unexpected Severe Narrowing of Laryngeal Inlet

Although many factors associated with difficult intubation have been known, predictors of difficult mask ventilation are not well known. We experienced a case of nearly complete airway obstruction following usual anesthetic induction which needed various emergency treatments. The patient had a preoperative diagnosis of contact granuloma of right posterior vocal cord and bilateral vocal cord palsy but later was found out as invasive laryngeal cancer. Upon the surgical field of view, both vocal cords were showing significantly thickened and fixated appearance and was considered as in the critical narrowing state with the potential of complete obstruction. Using C-MAC® video laryngoscope we were able to see the narrowed vocal cord and choose proper size of endo-tracheal tube. Consequently, intubation was successfully done and operation was conducted. From this case, we have lessons that physicians should examine the patient's airway more carefully in case of laryngeal mass and prepare emergency measures.

Auto-PEEP-like condition recognized by a sudden decrease in airway pressure during pressure controlled ventilation and low-flow anesthesia: A case report

During mechanical ventilation in the intensive care unit, auto-positive end-expiratory pressure (auto-PEEP) has been reported to occur in obstructive airway conditions aggravated by inappropriate ventilator settings. In this paper, we report a case of auto-PEEP-like problem during anesthesia, mainly caused by excessive sputum. After being positioned prone for spine surgery, the patient received pressure controlled ventilation at a low fresh gas flow rate. One hour after the start of surgery, sudden decreases in pressure and flow occurred. The typical maneuvers which could be performed by the anesthesiologists in the situations suggesting leakage within the breathing circuit consist of pressing the oxygen flush valve and manual hyperventilation for the initial evaluation. But from our experience in this case, we have learned that such maneuvers could cause unacceptable aggravation in the event of auto-PEEP. Also in this report, we discuss the difficulties in prediction based on the present knowledge of preoperative evaluation and the presumably best management policy regarding this type of auto-PEEP.

Effectiveness of milrinone for cardiogenic shock due to massive pulmonary aspiration: a case report / 대한마취과학회지

Pulmonary aspiration of gastric contents is one of the most frightening complications during anesthesia. Although pulmonary aspiration of gastric contents in general surgical patients is not common and resulting long-term morbidity and mortality are rare, severe hypoxemia and other sequelae of pulmonary aspiration continue to be reported. We report a case of massive aspiration of gastric contents during induction of general anesthesia, resulting in cardiac arrest due to severe pulmonary hypertension and myocardial infarction. Sustained cardiac arrest and shock that did not respond the conventional resuscitation was successfully treated using milrinone. The patient was discharged without complications in 20 days.

Trigemino-cardiac reflex: occurrence of asystole during trans-sphenoidal adenomectomy: a case report / 대한마취과학회지

The trigemino-cardiac reflex has been reported to occur during various craniofacial surgeries or procedures including manipulation of the trigeminal ganglion, tumor resection in the cerebellopontine angle, various facial reconstructions and trans-sphenoidal adenomectomy. Regarding risk factors during trans-sphenoidal adenomectomy, invasiveness closely related to the size of tumor and the degree of manipulation of cavernous sinus wall have been reported. We report the case of a 40-year-old female patient who had a relatively small-sized (< 10 mm) pituitary adenoma. Repetitive asystoles occurred during microscopic trans-sphenoidal operation of the wall of the cavernous sinus, which strongly suggests the importance of careful manipulation of the cavernous sinus wall. In addition to reporting this rare complication of trans-sphenoidal adenomectomy, we reviewed its clinical management by performing a literature search.

Minimum effective volume of mepivacaine for ultrasound-guided supraclavicular block / 대한마취과학회지

BACKGROUND: The aim of this study was to estimate the minimum effective volume (MEV) of 1.5% mepivacaine for ultrasound-guided supraclavicular block by placing the needle near the lower trunk of brachial plexus and multiple injections. METHODS: Thirty patients undergoing forearm and hand surgery received ultrasound-guided supraclavicular block with 1.5% mepivacaine. The initial volume of local anesthetic injected was 24 ml, and local anesthetic volume for the next patient was determined by the response of the previous patient. The next patient received a 3 ml higher volume in the case of the failure of the previous case. If the previous block was successful, the next volume was 3 ml lower. MEV was estimated by the Dixon and Massey up and down method. MEV in 95, 90, and 50% of patients (MEV95, MEV90, and MEV50) were calculated using probit transformation and logistic regression. RESULTS: MEV95 of 1.5% mepivacaine was 17 ml (95% confidence interval [CI], 13-42 ml), MEV90 was 15 ml (95% CI, 12-34 ml), and MEV50 was 9 ml (95% CI, 4-12 ml). Twelve patients had a failed block. Three patients received general anesthesia. Nine patients could undergo surgery with sedation only. Only one patient showed hemi-diaphragmatic paresis. CONCLUSIONS: MEV95 was 17 ml, MEV90 was 15 ml, and MEV50 was 9 ml. However, needle location near the lower trunk of brachial plexus and multiple injections should be performed.

Comparison of ultrasound-guided supraclavicular block according to the various volumes of local anesthetic / 대한마취과학회지

BACKGROUND: The ultrasound guidance in regional nerve blocks has recently been introduced and gaining popularity. Ultrasound-guided supraclavicular block has many advantages including the higher success rate, faster onset time, and fewer complications. The aim of this study was to examine the clinical data according to the varied volume of local anesthetics in the ultrasound-guided supraclavicular block. METHODS: One hundred twenty patients were randomized into four groups, according to the local anesthetic volume used: Group 35 (n = 30), Group 30 (n = 30), Group 25 (n = 30), and Group 20 (n = 30). Supraclavicular blocks were performed with 1% mepivacaine 35 ml, 30 ml, 25 ml, and 20 ml, respectively. The success rate, onset time, and complications were checked and evaluated. RESULTS: The success rate (66.7%) was lower in Group 20 than that of Group 35 (96.7%) (P < 0.05). The average onset times of Group 35, Group 30, Group 25, and Group 20 were 14.3 +/- 6.9 min, 13.6 +/- 4.5 min, 16.7 +/- 4.6 min, and 16.5 +/- 3.7 min, respectively. There were no significant differences. Horner's syndrome was higher in Group 35 (P < 0.05). CONCLUSIONS: In conclusion, we achieved 90% success rate with 30 ml of 1% mepivacaine. Therefore, we suggest 30 ml of local anesthetic volume for ultrasound-guided supraclavicular block.

Paresthesia and sensory deficits on the unilateral leg arising from an unrecognized intramedullary tumor after spinal anesthesia / 대한마취과학회지

No abstract available.

A suspected case of malignant hyperthermia that was successfully treated with dantrolene administration via nasogastric tube / 대한마취과학회지

No abstract available.

Experience with Using Multiple Types of Visual Educational Tools during Problem-Based Learning / 한국의학교육

PURPOSE: This study describes the experience of using multiple types of visual educational tools in the setting of problem-based learning (PBL). The author intends to demonstrate their roles in diverse and efficient ways of clinical reasoning and problem solving. METHODS: Visual educational tools were introduced in a lecture that included their various types, possible benefits, and some examples. Each group made one mechanistic case diagram per week, and each student designed one diagnostic schema or therapeutic algorithm per week, based on their learning issues. The students were also told to provide commentary, which was intended to give insights into their truthfulness. Subsequently, the author administered a questionnaire about the usefulness and weakness of visual educational tools and the difficulties with performing the work. Also, the qualities of the products were assessed by the author. RESULTS: There were many complaints about the adequacy of the introduction of visual educational tools, also revealed by the many initial inappropriate types of products. However, the exercise presentation in the first week improved the level of understanding regarding their purposes and the method of design. In general, students agreed on the benefits of their help in providing a deep understanding of the cases and the possibility of solving clinical problems efficiently. The commentary was helpful in evaluating the truthfulness of their efforts. Students gave suggestions for increasing the percentage of their scores, considering the efforts. CONCLUSION: Using multiple types of visual educational tools during PBL can be useful in understanding the diverse routes of clinical reasoning and clinical features.

Severe muscular rigidity following the usual analgesic dose of meperidine in the child at postanesthetic recovery room: A case report

Severe muscular rigidity is a rare but potentially serious side effect from the use of opioid, usually in high dose. However it has also been reported with the use of low to moderate dose of opioids in a few occasions. The age of the patients varied from newborn to old. These diverse and unpredictable natures of clinical manifestations seem to be related to the unknown mechanisms in the subcortical areas which are difficult to study. Now the author reports the case of severe muscular rigidity which occurred in the 5 year old child who received the usual analgesic dose of meperidine, notably in rapid injection. And after reviewing the related literatures,the author puts some emphasis regarding management of this problem.

Students' Response to the Questionnaire about the Usefulness of Concept Maps for Problem-Based Learning and the Forms of Concept Maps / 한국의학교육

PURPOSE: Concept maps have been studied and used in diverse ways in scientific fields. This study aimed to investigate the usefulness and limitations of using concept maps during problem-based learning (PBL) in Year 3 medical students. METHODS: After each PBL module, we gathered concept maps from each pair of students and questionnaires about the usefulness and limitations of concept maps, and analyzed them. RESULTS: There were two types of concept maps, with some modifications. The students felt that concept maps provided overall understanding, analysis, and reorganization of problem cases. But, they also criticized shortage of disciplines related to drawing skills and rationales for each type of map. A strong need for expert maps and feedback for students resulted. CONCLUSION: For optimal use of concept maps, we recommend that the committee implements a plan to teach drawing skills, explains rationales for each type of map, and gives feedback to students.