Genotypes of Clinical and Environmental Isolates of Cryptococcus neoformans and Cryptococcus gattii in Korea

Multilocus sequence typing analysis was applied to determine the genotypes of 147 (137 clinical and 10 environmental) Cryptococcus neoformans and three clinical Cryptococcus gattii isolates from 1993 to 2014 in Korea. Among the 137 clinical isolates of C. neoformans, the most prevalent genotype was ST5 (n = 131), followed by ST31 (n = 5) and ST127 (n = 1). Three C. gattii strains were identified as ST57, ST7, and ST113. All environmental isolates were identified as C. neoformans with two genotypes, ST5 (n = 7) and ST31 (n = 3). Our results show that C. neoformans isolates in Korea are genetically homogeneous, and represent a close genetic relationship between clinical and environmental isolates.

Characteristics of thyroid incidentalomas detected by pre-treatment 18FFDG PET or PET/CT in patients with cervical cancer / 부인종양

OBJECTIVE: Considering the increased use of [18F]FDG PET or PET/CT, the clinical significance of thyroid incidentalomas is the subject of controversy. The aim of this study was to determine the incidence of malignancies associated with thyroid incidentalomas detected by pre-treatment PET or PET/CT in patients with cervical cancer. METHODS: We retrospectively reviewed the medical records of patients with cervical cancer who had thyroid incidentalomas detected by pre-treatment PET or PET/CT and were treated at our institute between January 2001 and December 2009. RESULTS: Of 327 patients who underwent pre-treatment PET or PET/CT, 33 patients had thyroid incidentalomas (10.1%) and 4 patients were diagnosed with thyroid malignancies by percutaneous needle aspiration (PCNA) or surgery. To put it concretely, of 33 patients with thyroid incidentaloma, 16 patients had a diffuse uptake and 17 patients had a focal uptake. Four of 17 patients with focal uptake were diagnosed with thyroid malignancies (23.5%). One patient with a focal uptake had an atypical cell based on PCNA, but did not undergo additional studies. The mean SUVmax of thyroid malignancies did not differ from that of benign thyroid diseases. CONCLUSION: Thyroid incidentalomas are frequently detected by pre-treatment PET or PET/CT in patients with cervical cancer. Focal uptake on PET or PET/CT has a high risk of thyroid cancer.

Discharge criteria should be validated in patients who undergo ambulatory gynecologic surgery / 부인종양

No abstract available.

Guideline adherence to chemotherapy administration safety standards: a survey on nurses in a single institute / 부인종양

OBJECTIVE: Little is known about the guideline adherence of nurses to chemotherapy administration guidelines. We determined the guideline adherence of nurses to the Chemotherapy Administration Safety Standards and the relationship between demographic characteristics and guideline adherence. METHODS: Survey sheets containing two questions on demographic characteristics and 16 questions on the guideline adherence of nurses regarding chemotherapy administration were distributed to all in-patient departments in our hospital in which chemotherapy was performed. All clinical nurses in the department were recommended to respond. RESULTS: Of 202 nurses, 123 responses were collected (61% response rate). The guideline adherence rate was >70% for 15 of 16 questions, but 55% of respondents indicated that there was no competency monitoring for nurses. Nurses with >7 years of clinical nursing experience felt more competent in performing cardiopulmonary resuscitation (CPR) than nurses with <7 years of clinical nursing experience (p=0.032). CONCLUSION: The guideline adherence rate of nurses with respect to chemotherapy administration was high, with the exception of the absence of a competency monitoring for nurses. A significant number of nurses with <7 years of clinical nursing experience felt incompetent in performing CPR.

Analysis of TP53 Gene Mutations in the Korean Patients with Lung Cancer

BACKGROUND: Lung cancer is one of the leading causes of cancer-related deaths throughout the world. The gene tumor protein 53 (TP53) is frequently mutated in cases of lung cancer. This study was performed to investigate the frequencies and types of mutations in the TP53 gene in Korean patients with lung cancer. METHODS: We obtained tissue samples from 80 lung cancer patients and synthesized TP53 cDNA by using RNA isolated from these tissues by performing reverse transcriptase polymerase chain reaction. Hybridization and denaturing high-performance liquid chromatography were performed to identify the TP53 gene mutations, and then, the mutations were validated by direct sequencing. RESULTS: Forty mutations out of the 80 patients (50.0%) were noted in the TP53 gene. The frequencies of TP53 gene mutation for different cancer types, namely, squamous cell carcinoma, adenocarcinoma, and small cell carcinoma were 61.1%, 27.3%, and 26.7%, respectively. The mutation frequencies in the different regions of the gene were 10.0% for exon 4, 35.0% for exon 5, 12.5% for exon 6, 22.5% for exon 7, 17.5% for exon 8, and 2.5% for exon 9. The frequently mutated positions were codon 179 in exon 5, codons 202 and 220 in exon 6, and codons 266 and 273 in exon 8. CONCLUSIONS: Exon 5 was the most frequently mutated region in the TP53 gene. Compared to the patients with the other types of cancers, patients with squamous cell carcinoma showed a higher frequency of TP53 mutation. Codon 179 was the most frequently mutated codon in the TP53 gene.

The type of metastasis is a prognostic factor in disseminated cervical cancer / 부인종양

OBJECTIVE: The objectives of this study were twofold: to verify whether the type of metastasis (lymphatic vs. hematogenous) is a prognostic factor, and to identify molecular markers associated with survival in patients with disseminated cervical cancer. METHODS: Between April 1997 and May 2008, 30 patients with disseminated cervical cancer who had supraclavicular lymph node (N=13) or hematogenous metastases (N=17) were initially treated at our institute. We reviewed medical records to extract clinicopathologic variables. For 17 patients with available pathological specimens, we evaluated the association of immunohistochemical staining for metalloproteinase (MMP)-2, vascular endothelial growth factor (VEGF)-A, and laminin V gamma (LAMC)-2 with survival and clinicopathologic variables via a log-rank test and Cox regression analysis. RESULTS: Patients who had only lymphatic metastasis (odds ratio [OR], 5.3; 95% confidence interval [CI], 1.4 to 19.5) or completed initial treatment (OR, 3.2; 95% CI, 1.1 to 9.9) showed better survival than patients who did not, but none of the molecular markers were associated with survival. Out of 13 patients with only lymphatic metastasis, three patients who had received volume-directed radiation with concurrent chemotherapy had a long-term survival of over two years. However, patients with hematogenous metastasis showed extremely poor prognosis. CONCLUSION: The type of metastasis and completion of initial treatment were associated with prolonged survival in patients with disseminated cervical cancer, and over 20% of patients with lymphatic metastasis were salvaged with volume-directed radiation with concurrent chemotherapy. None of the molecular markers were associated with survival in patients with disseminated cervical cancer.

Detection of Recurrence by 18F-FDG PET in Patients with Endometrial Cancer Showing No Evidence of Disease

This study assessed the feasibility of F-18-fluorodeoxyglucose positron-emission tomography (18F-FDG PET) in the post-therapy surveillance for patients with endometrial cancer showing no evidence of disease (NED). From April 1997 to June 2007, 127 patients with endometrial cancer showing NED were performed 18F-FDG PET scan. The feasibility of 18F-FDG PET for the early detection of recurrence in patients with endometrial cancer was evaluated retrospectively. Of the 127 patients, 32 patients showed positive lesions on 18F-FDG PET scan. Nineteen (19/127 cases, 15%) of them were confirmed to have a recurrence clinically or histologically. The sensitivity, specificity and positive and negative predictive value of 18F-FDG PET for detecting recurrences in patients with endometrial cancer were 100%, 88%, 59% and 100%, respectively. In conclusion, 18F-FDG PET may be a useful method for the post-therapy surveillance in patients with endometrial cancer.

Current status of gynecological cancer in China / 부인종양

The aim of this review is to examine the current status of gynecological cancer in China focusing on epidemiological data. Epidemiological data on gynecological cancer in China is sparse. Therefore, most of the data were estimated via extrapolation based on a few available datasets. Cervical cancer is relatively rare and the incidence and mortality rate are largely decreasing. However, in young women, the incidence and mortality rates are increasing. The overall and age-specific incidence rates of cervical cancer appear to be varied according to geographical areas. The overall prevalence rate of human papillomavirus (HPV) in China is similar with other eastern Asian countries, but the age-specific HPV prevalence showed sustained high HPV prevalence rates in elderly women. There is not yet an established national program for cervical cancer prevention. The incidence rate of corpus and ovarian cancers in China slightly increased between 2000 and 2005, but is still lower than Japan or Korea. There is no reliable, national-level data on mortality rates of corpus and ovarian cancer in China. Breast cancer is one of the most rapidly increasing cancers in China. The increase was sharper in young women than in elderly women. Both increased risk and change of population size/structure contributed to the increase of breast cancer.

Clinicopathologic characteristics and prognostic factors of primary peritoneal carcinoma / 대한산부인과학회지

OBJECTIVE: The objective of this study was to examine the clinicopathologic characteristics and prognostic factors of primary peritoneal carcinoma (PPC). METHODS: Clinicopathologic variables were obtained by examining the medical records of patients with PPC who were diagnosed and treated at our institute, between January 1996 and December 2005. To find prognostic factors, the association of clinicopathologic variables with survival was evaluated by univariate and multivariate analysis. RESULTS: All patients had advanced-stage tumors. Residual tumor was smaller than 1 cm in 12 patients and was equal or larger than 1 cm in nine patients. The response rate to adjuvant chemotherapy was 47.6%. The median progression-free survival was eight months (range 1~95) and the median overall survival was 14 months (range 1~99). In univariate analysis, stage, the response to adjuvant chemotherapy, and neoadjuvant chemotherapy were associated with survival. However, in multivariate analysis, no variables were associated with survival. CONCLUSION: In spite of aggressive treatments, patients with PPC had poor prognosis. No prognostic factors were identified in this study.

Major clinical research advances in gynecologic cancer 2008 / 부인종양

In this review, we summarized 14 major clinical advances in gynecology which occurred in 2008. For cervical cancer, clinical impact of HPV vaccine, prognostic value of imaging during radiotherapy, and oncologic/obstetric outcomes of fertility-sparing surgery were chosen. For uterine cancer, optimal method of adjuvant radiotherapy in intermediate-risk patients, extent of lymph node dissection, outcome of robot-assisted staging surgery, new standard chemotherapy regimen for leiomyosarcoma were selected. For ovarian cancer, recent changes in adjuvant therapy, feasibility of neoadjuvant chemotherapy, prediction of optimal secondary cytoreduction, studies on new biomarkers, advances in screening and treatment of women with BRCA mutations were included. For other cancers, the safety of sentinel lymph node dissection in vulvar cancer and chemotherapy regimens for low-risk gestational trophoblastic tumors were reviewed.

Major clinical research advances in gynecologic cancer 2008 / 부인종양

In this review, we summarized 14 major clinical advances in gynecology which occurred in 2008. For cervical cancer, clinical impact of HPV vaccine, prognostic value of imaging during radiotherapy, and oncologic/obstetric outcomes of fertility-sparing surgery were chosen. For uterine cancer, optimal method of adjuvant radiotherapy in intermediate-risk patients, extent of lymph node dissection, outcome of robot-assisted staging surgery, new standard chemotherapy regimen for leiomyosarcoma were selected. For ovarian cancer, recent changes in adjuvant therapy, feasibility of neoadjuvant chemotherapy, prediction of optimal secondary cytoreduction, studies on new biomarkers, advances in screening and treatment of women with BRCA mutations were included. For other cancers, the safety of sentinel lymph node dissection in vulvar cancer and chemotherapy regimens for low-risk gestational trophoblastic tumors were reviewed.

Outcome of cervical cancer in extremely elderly patients receiving radiation therapy / 부인종양

OBJECTIVE: The aim of this study was to evaluate the tolerance and outcome of elderly cervical cancer patients who were treated with radiation therapy retrospectively. METHODS: Fourteen patients over 80 years with pathologically proven stage I-IV cervical cancer who were treated with definitive RT between 1993 and 2003 were analyzed. We investigated response rates, recurrence rates, complications, progression free intervals, and current status of subjects. RESULTS: The age of the 14 patients ranged from 80 to 88 (median age: 81). The distribution of clinical stage by FIGO classification were > or =stage IIB (78.6%). The most common histologic type was squamous cell carcinoma. Nine patients (64.3%) underwent definitive radiation therapy. Among the 9 patients who had undergone radiotherapy, 7 patients (77.8%) showed complete response. One patient underwent surgical intervention followed by chemotherapy due to progression of disease despite radiotherapy. Two patients experienced radiation cystitis and 1 patient suffered from radiation colitis, however, other patients did not manifestate significant complications. One patient who underwent palliative chemotherapy due to persistent disease experienced mild marrow suppression and neurologic symptoms temporarily. CONCLUSION: The elderly patients over 80 years with good performance status may tolerate definitive pelvic radiation administered according to conventional fractionation schedules to control cervical cancer. Definitive radiation therapy with or without concurrent chemotherapy should not be excluded as a treatment option even for patients older than 80 years.

The Systemic Effects of Hypothermic and Normothermic Cardiopulmonary Bypass in Cardiac Surgery / 대한흉부외과학회지

BACKGROUND: This study was prospectively designed to determine the physiologic effects of normothermic CPB and to compare its influences with hypothermic CPB. MATERIAL AND METHOD: Thirty-six adult patients scheduled for elective cardiac surgery were randomly assigned to moderate hypothermic (hypothermic group nasopharyngeal temperature 26~28 degreeC, n=18) or normothermic (normothermic group, nasopharyngeal temperature>35.5 degreeC, n=18) CPB. Arterial blood samples were taken before CPB (Pre-CPB), 10 minutes after the start of CPB (CPB-10), and immediately after CPB stop (CPB-off) for determining total leukocyte counts, neuron-specific enolase (NSE), interleukin-6 (IL-6), endothelin-1 (ET-1), cortisol, troponin I (TNI), aspartate aminotransferase (AST), alanine aminotransferase (ALT), creatinine, blood urea nitrogen (BUN), and the pulmonary index (PI, PaO2/FiO2). Other parameters such as urine output, mechanical ventilating period, ICU-staying period, postoperative complications and hospitalized days were also evaluated. RESULT: Total leukocyte counts, increased rate in NSE, in IL-6 and in cortisol at CPB-10 and CPB-off were significantly higher in normothermic group than in hyphothermic group. Urine output during CPB was lower in normothermic group than in hyphothermic group. The duration of mechanical ventilation, ICU-stay, and hospitalization were longer in normothermic group than in hyphothermic group. CONCLUSION: These findings suggested that normothermic CPB caused higher inflammatory and stress responses than hypothermic CPB during cardiac surgery using cold crystalloid cardioplegia. However, further studies with large number of cases should be carried out to validate this hypothesis.

The Influences of Perfusion Temperature on Inflammatory and Hematologic Responses during Cardiopulmonary Bypass / 대한흉부외과학회지

BACKGROUND: Several studies have demonstrated that conventional hypothermic cardiopulmonary bypass (CPB) causes cellular injury, abnormal responses in peripheral vascular beds and increased postoperative bleeding, whereas normothermic CPB provides protection of the hypothermic-induced effects and better cardiac recovery. The present study was prospectively performed to compare the effects of normothermic CPB to those of hypothermic CPB on the inflammatory and hematologic responses during cardiac surgery. MATERIAL AND METHOD: Thirty-four adult patients scheduled for elective cardiac surgery were randomly assigned to hypothermic CPB (nasopharyngeal temperature 26~28degreesC, n=17) or normothermic CPB (nasopharyngeal temperature>35.5degreesC, n=17) group. In both groups, cold (4degreesC) crystalloid cardioplegia was applied for myocardial protection. Blood samples were drawn from radial artery before (Pre-CPB), 10 minutes after starting (CPB-10) and immediately after ending (CPB-OFF) CPB. Total leukocyte and platelet counts, interleukin-6 (IL-6) level(expressed as percent to the baseline of Pre-CPB), D-dimer level, protein C and protein S activity were measured with the blood samples. The amount of bleeding for postoperative 24 hours and blood transfusion after operation were also assessed. All parameters were compared between the two groups. RESULT: The total leukocyte counts (10,032+/-65/mm3) and the increased ratio of IL-6 (353+/-7.0%) at CPB-OFF in the normothermic group were higher than that (7,254+/-48/mm3 and 298+/-7.3%) of the hypothermic group(p=0.02 and p=0.03). In the normothermic group, protein C activity (32+/-3.8%) and protein S activity (35+/-4.1%) at CPB-OFF were significantly lower than that (45+/-4.3% and 51+/-3.8%) of the hypothermic group (p=0.04 and p=0.009). However, there were no differences in platelet counts and D-dimer concentration. In the normothermic group, the amount of bleeding for postoperative 24 hours (850+/-23.2 mL) and requirements for blood transfusion after operation such as packed cell (1,402+/-20.5 mL), fresh frozen plasma (970+/-20.8 mL) and platelet (252+/-6.4 mL) were higher than that (530+/-21.5 mL, 696+/-15.7 mL, 603+/-18.2 mL and 50+/-0.0 mL) of the hypothermic group. CONCLUSION: These results indicate that normothermic CPB with cold crystalloid cardioplegia was associated with higher increase in inflammatory response, hemostatic abnormalities and postoperative bleeding problem than moderate hypothermic CPB.

The Effects of Hypercapnia and High Flow on Cerebral Metabolism During Cardiopulmonary Bypass / 대한흉부외과학회지

BACKGROUND: Recent studies have demonstrated that cerebral desaturation during rewarming period of CPB was associated with postoperative neurologic dysfunction. The prevention of cerebral desaturation during CPB may reduce the incidences of neurologic and neuropsychological complications. The present study was prospectively undertaken to compare the clinical effects between two strategies (hypercapnic CPB and high flow CPB) to prevent cerebral desaturation for establishing a proper CPB technique. MATERIAL AND METHOD: Thirty-six adult patients scheduled for elective cardiac surgery were randomized into either hypercapnic (PaCO2 45~50 mmHg, n=18) or high flow group (flow rate 2.75 L/m2/min and PaCO2 35~40 mmHg, n=18) during rewarming period of CPB. In each patient, middle cerebral artery blood flow velocity (VMCA), cerebral arteriovenous oxygen content difference (C(a-v)O2), modified cerebral metabolic rate for oxygen (MCMRO2), cerebral oxygen transport rate (TEO2), incidence of cerebral desaturation (internal jugular bulb blood oxygen saturation < or =50%), increased rate of S-100 beta concentration, and arterial and internal jugular bulb blood gas were measured during the five phases of the operation; Pre-CPB, CPB-10 min (steady-state CPB, nasopharyngeal temperature 29~30 degrees C), Rewarm-1 (rewarming phase, nasopharyngeal temperature 33 degrees C), Rewarm-2 (nasopharyngeal temperature 37 degrees C), and CPB-off. Incidence of postoperative delirium and duration were assessed in all patients. All variables were compared between the two groups. RESULT: VMCA (157.88+/-10.87 vs 120.00+/-6.18%, p=0.006), internal jugular bulb O2 saturation (68.01+/-2.75 vs 61.28+/-2.87%, p=0.03) and O2 tension (41.01+/-2.25 vs 32.02+/-1.67 mmHg, p=0.03), and TEO2 (110.84+/-7.41 vs 81.15+/-8.11%, p=0.003) at rewarming periods were higher in the hypercapnic group than in the high flow group. C(a-v)O2 (4.0+/-0.30 vs 4.84+/-0.38 mg/dL, p=0.04), COE (0.36+/-0.03 vs 0.42+/-0.03, p=0.04), increased rate of S-100 beta(391.67+/-23.40 vs 940.0+/-17.02%, p=0.003), and incidence of cerebral desaturation (2 vs 4 patients, p= 0.04) at rewarming periods, and duration of postoperative delirium (18 vs 34 hr, p=0.02) were low in the hypercapnic group compared to the high flow group. CONCLUSION: These results indicate that hypercapnic CPB may provide relatively diminished cerebral injury and beneficial effects for cerebral metabolism relatively compared to high flow CPB.

Young Rabbit Model for Pathophysiologic Study of Acute Lung Injury in Early Childhood / 대한흉부외과학회지

BACKGROUND: Adult respiratory distress syndrome (ARDS) is of particular interest because of its severity of the associated lung injury and its high mortality. However, the pathophysiologies of ARDS in infant and childhood groups are still not well clarified inspite of many previous investigations. To investigate the time course of pathophysiology of ARDS in infant and childhood groups, this study was designed with experimental endotoxin-induced ARDS model using young rabbits (8 week-old). MATERIAL AND METHOD: Rabbits were divided into the control group (n=8) and the endotoxin-treated group (n=32). The endotoxin group was subdivided into 4 groups by the sampling times as 3, 6, 12 and 24 hr-groups (G-E3,6,12,24, each n=8). The experimental ARDS was made by a bolus injection of endotoxin (Escherichia coli serotype O55:B5, 0.50 mg/kg) via rabbit ear vein. For evaluation of the hematologic and inflammatory markers, and superoxide dismutase (SOD) concentrations, the blood samples were taken from the heart. The bronchoalveolar lavage fluid (BALF) were obtained for analysis of the leukocytes and protein concentration. With biopsy of the lung, histopathologic changes of the lung were also evaluated. RESULT: In the endotoxin groups, significant leukopenia (owing to pancytopenia) occurred in 3 and 6-hr groups, which was followed by significant leukocytosis (owing to neutrophilia) in the 12 and 24-hr groups (p<0.05). Serum levels of tumor necrosis factor-alpha (TNF-alpha) and interleukin-1beta (IL-1 beta) in the endotoxin groups were higher than those of control group (p<0.05). Serum levels of superoxide dismutase (SOD) of G-E3 and G-E6 were higher than those of control group, whereas those of G-E12 were lower than those of control groups (p<0.05). Total leukocyte counts and protein concentrations in BALF were significantly elevated in the endotoxin groups compared to the control group (p<0.05). The hemorrhagic pattern of BALF showed occurred in the endotoxin groups. The endotoxin groups (in G-E6) had severe infiltration of inflammatory cells (lymphocyte and monocyte) in the pulmonary interstitium and parenchyma, migrations of neutrophil and eosinophil into alveolar spaces and interstitial widening, which are the evidences of acute lung injury. In the endotoxin groups, there were significant positive correlations between the BALF findings and the immunologic markers (TNF-alpha, IL-1 beta, SOD) (p<0.05). CONCLUSION: Severe acute lung injury occurred in all the endotoxin-treated rabbits. The pathophysiologic findings were so progressive until 6-hr by time dependant pattern, and then recovered slowly. Variable hematologic, immunologic, and pathologic factors were well correlated in the development and progression of endoxin-induced lung injury. The pathophysiologic responses were sensitive and rapid in young rabbit Young rabbit seemed to be a useful experimental animal model for infant and childhood groups.

A Case of Spontaneous Pneumothorax During Chemotherapy for Metastatic Choriocarcinoma / 대한산부인과학회잡지

Spontaneous pneumothorax is a rare complication of pulmonary metastatic disease, most often following chemotherapy for osteogenic sarcomas, primary lung cancer or malignant germ cell tumors. Intensive chemotherapy may theoretically increase the risk of pneumothorax in patients with manifest or occult lung metastases by inducing rapid lysis of the tumor tissue and by interfering with repair processes. We present a case of patient with spontaneous pneumothorax after the introduction of chemotherapy for metastatic choriocarcinoma and review the literature and discuss the possible pathophysiologic mechanisms.

A Case of Endometriosis at the Site of Abdominal Scar following Cesarean Section and A Case of Parenchymal Pulmonary Endometriosis / 대한산부인과학회잡지

Abdominal wall endometriosis secondary to cesarean section is very rare condition, being reported in less than 0.5% of patients undergoing cesarean section. Moreover, parenchymal pulmonary endometriosis is a rare gynecologic problem, characterized by cyclic hemoptysis. We experienced 38 years old female patient who had had cyclically appearing painful abdominal wall mass after cesarean section pathologically proven endometriosis and 33 year-old female patient with recurrent catamenial hemoptysis localized with CT scanning, and then treated with GnRH agonist. So, we present two cases with a brief review of literatures.

Comparison of Effects of Normothermic and Hypothermic Cardiopulmonary Bypass on Cerebral Metabolism During Cardiac Surgery / 대한흉부외과학회지

BACKGROUND: Moderate hypothermic cardiopulmonary bypass (CPB)has commonly been used in cardiac surgery.Several cardiac centers recently practice normothermic CPB in cardiac surgery.However,the clinical effect and safety of normothermic CPB on cerebral metabolism are not established and not fully understood.This study was prospectively designed to evaluate the clinical influence of normothermic CPB on brain metabolism and to compare it with that of moderate hypothermic CPB. MATERIAL AND METHOD: Thirty-six adult patients scheduled for elective cardiac surgery were randomized to receive normothermic(nasopharyngeal temperature>34.5 degrees C,n=18)or hypothermic (nasopharyngeal temperature 29~30 degrees C,n=18)CPB with nonpulsatile pump.Middle cerebral artery blood flow velocity(VMCA), cerebral arteriovenous oxygen content difference (CAVO2),cerebral oxygen extraction (COE),modified cerebral metabolic rate for oxygen (MCMRO2),cerebral oxygen transport (TEO2),cerebral venous desaturation (oxygen saturation in internal jugular bulb blood < or =50 %),and arterial and internal jugular bulb blood gas analysis were measured during six phases of the operation:Pre-CPB (control),CPB-10 min,Rewarm-1 (nasopharyngeal temperature 34 degrees Cin the hypothermic group),Rewarm-2 (nasopharyngeal temperature 37 degrees Cin the both groups),CPB-off and Post-CPB (skin closure after CPB-off). Postoperaitve neuropsychologic complications were observed in all patients.All variables were compared between the two groups. RESULT: VMCA at Rewarm-2 was higher in the hypothermic group (153.11 +/-8.98%)than in the normothermic group (131.18 +/-6.94%) (p<0.05).CAVO (2) (3.47 +/-0.21 vs 4.28 +/-0.29 mL/dL,p<0.05),COE (0.30 +/-0.02 vs 0.39 +/-0.02,p<0.05)and MCMRO (2) (4.71 +/-0.42 vs 5.36 +/-0.45,p<0.05)at CPB-10 min were lower in the hypothermic group than in the normothermic group.The hypothermic group had higher TEO (2) than the normothermic group at CPB-10 (1,527.60 +/-25.84 vs 1,368.74 +/-20.03, p<0.05),Rewarm-2 (1,757.50 +/-32.30 vs 1,478.60 +/-27.41,p<0.05)and Post-CPB (1,734.37 +/-41.45 vs 1,597.68 +/-27.50,p<0.05).Internal jugular bulb oxygen tension (40.96 +/-1.16 vs34.79 +/-2.18 mmHg,p<0.05),saturation (72.63 +/-2.68 vs 64.76 +/-2.49 %,p<0.05)and content (8.08 +/-0.34 vs 6.78 +/-0.43 mL/dL,p<0.05)at CPB-10 were higher in the hypothermic group than in the normothermic group.The hypothermic group had less incidence of postoperative neurologic complication (delirium)than the normothermic group (2 vs 4 patients,p<0.05). Lasting periods of postoperative delirium were shorter in the hypothermic group than in the normothermic group (60 vs160 hrs,p<0.01). CONCLUSION: These results indicate that normothermic CPB should not be routinely applied in all cardiac surgery,especially advanced age or the clinical situations that require prolonged operative time. Moderate hypothermic CPB may have beneficial influences relatively on brain metabolism and postoperative neuropsychologic outcomes when compared with normothermic CPB.

The Clinical Effects of Normocapnia and Hypercapnia on Cerebral Oxygen Metabolism in Cardiopulmonary Bypass / 대한흉부외과학회지

BACKGROUND: Substantial alterations in cerebral blood flow(CBF) are known to occur during cardiopulmonary bypass(CPB). Many investigators have speculated that these changes may be responsible for both minor and major cerebral damages after CPB. More recently, these changes in CBF have been observed to be intimately related to the arterial carbon dioxide tension(PaCO2) maintained during CPB. The present study was prospectively designed to investigate the clinical effects of normocapnic and hypercapnic CPB on the cerebral oxygen metabolism in cardiac surgery. MATERIAL AND METHOD: Thirty-six adult patients scheduled for elective cardiac surgery were randomized to either normocapnic group (PaCO2 35~40 mmHg, n=18) or hypercapnic group(PaCO2 45~55 mmHg, n=18) with moderately hypothermic nonpulsatile CPB(nasopharyngeal temperature of 29~30degrees C). In each patient, middle cerebral artery blood flow velocity(VMCA), cerebral arteriovenous oxygen content difference (C(a-v)O2), cerebral oxygen extraction(COE), cerebral metabolic rate for oxygen(CMRO2), cerebral oxygen transport(TEO2), TEO2/CMRO2 ratio, cerebral desaturation(internal jugular bulb blood oxygen saturation