Clinical ; Hepatitis E

The hemodynamic effects of rapid intravenous (IV) administration of 10% dextran 40 in saline solution (D40) and 7.2% hypertonic saline solution (HSS) in calves were compared. Calves received isotonic saline solution (ISS), HSS or D40 (3 calves/group) and were monitored of blood pressure, and cardiac output (CO) for 180 min. HSS and D40 infusions induced a significant increase in relative plasma volume reaching 134.9 +/- 2.8 and 125.0 +/- 1.9%, respectively at the end of fluid infusion. In the HSS group, CO, cardiac index (CI) and stroke volume (SV) remained constant at low levels after 90 minutes despite the maximal values of CO, CI and SV at the end of infusion, reaching 21.0 +/- 6.3 l/min (p<0.05), 177.8 +/- 14.2 ml/min/kg (p < 0.001) and 0.20 +/- 0.03 l/beat (at t = 10 min, p < 0.001), respectively. In contrast, CI and SV in the D40 group showed significant increases to 14.7 +/- 2.9 l/min and 153.5 +/- 17.2 ml/min/kg, respectively, at the end of fluid infusion. And those values remained constant at higher levels than those of the before infusions values throughout the experimental periods. Positive effects for hemodynamic alternations of D40 in calf practice were milder and longer than those of HSS. Therefore, the D40 infusion should be explored as a possible treatment for dehydrated calves, since rapid infusion of D40 may be safe and more beneficial for rehydrating more than HSS treatment.
Animals ; Blood Pressure/drug effects ; Cardiac Output/drug effects ; Cattle ; Cattle Diseases/blood/pathology/physiopathology/*therapy ; Chlorides/blood ; Dextrans/*administration&dosage ; Heart Rate/drug effects ; Hypovolemia/blood/pathology/physiopathology/*therapy/*veterinary ; Infusions, Intravenous/veterinary ; Plasma Substitutes/*administration&dosage ; Plasma Volume/veterinary ; Potassium/blood ; Saline Solution, Hypertonic/*administration&dosage ; Sodium/blood

It is known that lactic anions and hydrogen ions (H⁺) produced during intense exercise are partly transported or diffused from muscle to blood resulting in the production of non-metabolic CO₂ through the bicarbonate buffering system. The purpose of the present study was to examine the reliability of the estimation of non-metabolic CO₂ output using respiratory gas analysis during incremental exercise. Six healthy subjects underwent an incremental pedaling exercise test accompanied by respiratory gas and arterial blood sampling. The rate of non-metabolic CO₂ output (VCO₂-NM) was calculated by subtracting projected metabolic VCO₂ from actual VCO₂ after CO₂ threshold (CT) . CT was determined using a modified V-Slope method. Bicarbonate (HCO₃^-), pH, CO₂ partial pressure and lactate concentration were measured from arterial blood samples using automatic analyzers. The kinetics of VCO₂-NM and HCO₂^- were compared throughout the exercise test. VCO₂-NM was significantly correlated with HCO₃^-decrease after CT (r=0.976, p<0.001) and the kinetics of VCO₂-NM and HCO₃^- decrease were similar during exercise. Furthermore, the amount of non-metabolic CO₂ output (NM-CO₂) calculated integrating VCO₂-NM above CT was significantly correlated with the difference in HCO₃^-between CT and exhaustion (r=0.929, p<0.01) and with the difference in arterial blood pH between rest and exhaustion (r=0.863, p<0.05) . However, NM-CO₂ was not significantly related to maximum ventilation (r=0.111, ns) . These results suggest that the estimation of non-metabolic CO₂ output during incremental exercise proposed in the present study is reliable. It was also suggested that the primary factor which influenced nonmetabolic CO₂ output during incremental exercise was the addition of H⁺ into blood and not hyperventilation.

With the advent of a society in which the number of elderly people is increasing and the number of babies a woman gives birth to in her lifetime is decreasing, how to address to the future financial broblem of the nation's health insurance schemes has come up for discussion. Against the backdrop of quantitative repletion of medical care, the government has come pu with a policy calling for the containment of medical costs. Under the circumstances, it is expected that the proceeds from medical treatment will level off in years to come. To cope with the situation, the Federation of Agricultural Cooperatives for Welfare in Aichi Prefecture has planned to install a department-wise cost control system in its member hospitals with eht aim of making all staff members cost-conscious, profit-minded and futrure-oriented in every department. In this paper, the authors will present the system in outline and show the target number of patients set on the basis of the break-even point, financial analyses of departments where revenues are below the break-even point and measures to deal with deficits case by case. In addition, as a task to be tackled with, the need for the omprovement of the accuracy and the standardization of the system will be discussed.

A five-year-old boy with a univentricular heart, inferior vena cava interruption, and azygos connection was admitted to our hospital to undergo a staged Fontan-type procedure. Pectus excavatum had developed after he underwent total cavopulmonary shunt at the age of three years. Computed tomography revealed that the hepatic vein was just behind the recessed sternum. We performed simultaneous Nuss and Fontan-type procedures because we were afraid of the compression of the Fontan pathway from the hepatic vein to the pulmonary artery by the recessed sternum. A cardiopulmonary bypass was established and the hepatic vein and pulmonary artery were bypassed with a 16-mm expanded polytetrafluoroethylene graft. After removing the cardiopulmonary bypass, the Nuss procedure was performed. Although the bilateral thoracic cavities were diffusely and densely adhered, adhesiotomy was safely performed under direct visualization. The postoperative course was uneventful. Postoperative computed tomography showed that the pectus excavatum was well repaired and the Fontan pathway was not compressed by the sternum. Although there are few reports of Fontan-type and Nuss procedures being simultaneously performed, this method is useful for securing the space of the Fontan pathway and for preserving good Fontan circulation in the long term.

Aortic dissection during cardiac operation is a rare but serious complication. Early detection and adequate repair is essential in this situation. A 69-year-old man in whom an aortic valve sparing operation for aortic root dilatation with aortic regurgitation had been begun, had an intraoperative aortic dissection 10min after the start of right axillary artery perfusion. Intraoperative transesophageal echocardiography and direct epi-aortic echo revealed acute aortic dissection extending from the aortic root to at least the descending aorta. The dissection was successfully repaired by a Bentall operation and hemiarch replacement using hypothermic circulatory arrest, selective cerebral perfusion, and antegrade perfusion from an anastomosed graft.

Objective: Early life events connected with the risk of later disease can occur not only in utero, but also in infancy. In study of the developmental origins of health and disease, the relationship between infantile growth patterns and adolescent body mass index and blood pressure is one of the most important issues to verify.
Materials and Methods: We analyzed the correlation of current body mass index and systolic blood pressure of 168 female college students with their growth patterns in utero and in infancy.
Results: Body mass index and systolic blood pressure in adolescence showed positive correlations with changes in weight-for-age z scores between 1 and 18 months but not with those between 18 and 36 months. Stepwise multiple regression analysis showed that both change in weight-for-age z scores from 1 to 18 months and body mass index at 1 month were significantly and independently associated with systolic blood pressure in adolescence. Body mass index at 36 months was positively correlated with body mass index in adolescence, while body mass index at birth was negatively correlated with body mass index in adolescence.
Conclusion: Our findings shows that restricted growth in utero and accelerated weight gain in early infancy are associated with the cardiovascular risk factors of high systolic blood pressure and high body mass index in adolescence. In Japan, an increasing proportion of low birth weight infants and accelerated catch-up growth after birth have been observed in recent decades. This might be an alarming harbinger of an increase in diseases related to the developmental origins of health and disease in Japan.

Re-do open cardiac surgery may sometimes require complete ablation around the pericardium for the 2 major reasons of attaining better myocardial protection and obtaining effective DC cardioversion. However, this ablation may increase postoperative hemorrhage which may require blood transfusion. Hypothermia is based on the concept of myocardial protection during open heart surgery by suppressing myocardial metabolism, but recently the approach has been changed to maintaining myocardial metabolism with aerobic or anaerobic energy production. We have already reported that histidine-buffered cardioplegia which promote anaerobic glycolysis, provided an excellent functional recovery of myocardium post-ischemia with lower inotropic requirements in a range from 10°C to 37°C of myocardial temperature. Based on our theoretical background and clinical data, we tested the efficacy of this type of cardioplegia in patients receiving multiple surgical procedures with minimum ablation after sternotomy. First case, who had undergone a Bentall procedure for annulo-aortic ectasia 14 years previously had a thrombotic valve and mitral regurgitation. Aortic valve plasty and mitral valve replacement (MVR) was performed. The second case who had undergone MVR 15 years previously had malfunction of the prosthetic valve and underwent re-MVR. The third and fourth cases had ventricular septal defect (VSD) which were closed using Teflon patches. The third case had patch closure during second operation for residual shunt. The fourth case received tricuspid valve replacement (TVR) for tricuspid regurgitation due to a pacemaker lead implanted into the right ventricle through the left subclavian vein. The fifth case received coronary artery bypass surgery in a second operation for restenosis of the graft and progressing atherosclerosis. All hearts started beating spontaneously without DC cardioversion after the aortic unclamp. Ventricular fibrillation occurred in the first case while the patient was weaned from cardiopulmonary bypass and treatment was performed by aortic cross clamp, infusion of the cardioplegia followed by aortic unclamp to start own beat again. Two of 3 patients who were able to donate their own blood preoperatively did not require homologous blood transfusion. Due to advantages such as excellent myocardial protection under hypothermic or normothermic condition, ease of use and relatively lower potassium concentration, histidine-buffered cardioplegia can be an excellent candidate for myocardial protection in re-do cases with less ablation technique.

Liver metastases from colorectal carcinoma commonly form nodular lesions in the liverparenchyma. We report a case of liver metastasis from rectal adenocarcinoma that extendedpredominantly into the bile duct. A 62-year-old Japanese man underwent low anteriorresection for rectal adenocarcinoma 9 years ago. Approximately 3 years later, he underwentradiofrequency ablation therapy for a metastatic liver tumor. Nine years after surgery, atumor in liver segment III exhibiting intrabiliary extension was discovered; it wasunclear if this was a metastatic liver tumor or intrahepatic cholangiocarcinoma.Accordingly, we performed a left hepatectomy with lymph node dissection. The tumor wasnegative for cytokeratins 7 and 20, and was histologically similar to the primary rectaladenocarcinoma; it was diagnosed as rectal carcinoma metastasis. The patient has survivedfor 3 years after the hepatic surgery, for 9 years after radiofrequency ablation therapy,and for 12 years after the primary surgery. This case shows that liver metastasis fromcolorectal carcinoma can present as a predominantly intrabiliary growth that mimicsintrahepatic cholangiocarcinoma on imaging. Moreover, our case provides evidence for thesuperiority of anatomical hepatectomy over partial hepatectomy for metastatic liver tumorswith intrabiliary growth arising from rectal adenocarcinomas.

Objective : Transarterial or transapical aortic valve replacement (TAVR) procedures have been performed for high-risk patients with severe aortic valve stenosis (AS) in western countries. A high-risk patient is defined as having an STS score greater than 10%. In Japan, aortic valve replacement (AVR) with cardiopulmonary bypass (CPB) is standard care for AS, even if the patient is at high risk of developing complications. We calculated an expected operative risk of patients using a JAPAN score established by Japanese Adult Cardiovascular Surgery Database (JACVSD). Patients and Methods : Patients were divided into three groups : score less than 5%, low risk (LR) ; score 5-10%, moderate risk (MR) ; score more than 10%, high risk (HR). We also evaluated the efficacy of conventional AVR in each group. Between January 2002 and May 2011, we performed conventional AVR in our hospital and 116 patients who underwent AVR for symptomatic AS were enrolled in this study. Results : There were 79 patients in the LR group, 30 patients in the MR group and 7 patients in the HR group. The mean score was 2.6±1.1% in the LR group, 6.8±1.4% in the MR group and 23.3±16.8% in the HR group respectively. The mean follow-up period was 7.6±0.3 years. Preoperative co-morbidity was not statistically significant among three groups, however more octogenarians were found in the HR group. The aortic valve area and left ventricular ejection fraction (LVEF) were significantly smaller in the HR group. There were 4 cancer patients. The HR group had significantly longer operation and CPB times than the LR group. The operative mortality in all cases was 1.6%. Overall survival at 5 years was 78%. Actual survival at 5 years was 77% in the LR group, 82% in the MR group and 71% in the HR group. The major adverse cardiac and cerebrovascular event (MACCE)-free ratio at 5 years was 85%. Absence of death caused by MACCE at 5 years was 93%. All cancer patients died after AVR due to advancement in cancer. Conclusion : The results of conventional AVR with CPB were satisfactory in each group. Cancer patients may be good candidates for TAVR in the future.