CONVEYING CHARACTERISTICS OF THE SCREW CONVEYOR

ArticleJournal of the Faculty of Textile Science and Technology, Shinshu University. Ser. B, Engineering 10: 1-10(1968)departmental bulletin pape

CONVEYING CHARACTERISTICS OF THE SCREW CONVEYOR

Articleapplication/pdfJournal of the Faculty of Textile Science and Technology, Shinshu University. Ser. B, Engineering 10: 1-10(1968)departmental bulletin pape

Case report: New treatment with Tolvaptan for heart failure after cardiac surgery

The vasopressin V&lt;sub&gt;2&lt;/sub&gt; receptor antagonist (Tolvaptan) is a new diuretic that selectively promotes the excretion of water. It has been reported to be effective for patients in cardiology, but there have been no reports of its use in the perioperative period after cardiac surgery. We report the usefulness of Tolvaptan for postoperative fluid management in a patient with severe mitral regurgitation due to ischemic cardiomyopathy. Marked improvement was achieved after administration of Tolvaptan for heart failure in the postoperative period.</jats:p

Early and Long-Term Outcomes in Japanese Patients Aged 80 Years or Older Undergoing Conventional Aortic Valve Replacement

In this study, we investigated the early and long-term results of conventional aortic valve replacement (AVR) in very old patients. Methods: Seventy-five patients with aortic stenosis underwent conventional AVR for patients aged 80 years.We examined early death and major adverse cardiovascular and cerebrovascular event (MACCE). Results: The operative mortality was 0% for isolated AVR and 19.2% for concomitant surgery. The postoperative survival rate and MACCE free-rate were no significant differences between the isolated AVR and the concomitant surgery. Univariate analysis confirmed that cardiac dysfunction, severe chronic kidney disease (CKD), hemodialysis, + coronary artery bypass grafting, and norepinephrine use were risk factor of early death. Univariate analysis confirmed that severe CKD, BNP >1000 pg/ml, aortic cross clamping time (ACCT) >180 min, and non-use carperitide and multivariate analysis confirmed that ACCT >180 min, and non-use carperitide were risk factor of MACCE. Conclusions: This study showed that the results of conventional AVR in very old patients were not satisfactory. However, the results obtained with isolated AVR were favorable with no operative deaths. The present study demonstrated that preoperative cardiac function, preoperative renal function, and operative factors have an important impact on early mortality and MACCE

Experimental investigation of “hANP shot” using human atrial natriuretic peptide for myocardial protection in cardiac surgery

SummaryBackgroundWe investigated myocardial protection by human atrial natriuretic peptide (hANP) during cardiac surgery without cardioplegia and determined whether suppression of myocardial ischemic reperfusion injury by hANP allows intraoperative aortic cross-clamp time to be prolonged.Methods and resultsThirty-two pigs were placed on cardiopulmonary bypass. Experimental pigs were divided into 4 groups: 15min clamping; hANP 15min clamping; 30min clamping; and hANP 30min clamping. In both hANP groups, a 100μg dose of hANP was administered after clamping. Left ventricular function, premature ventricular contractions (PVCs), histopathological studies, 8-isoprostane, myocardial Ca2+, and ATP concentrations were determined. Comparison of the myocardial contractile force indicator Emax, in the 30min groups, showed a significantly higher recovery rate in the hANP than in the control group. PVC numbers were significantly lower in the hANP than in the control groups for both arrest durations. On microscopic examination, hANP reduced ischemic reperfusion injury in the 30min groups. The myocardial ATP level was significantly higher in the hANP 30min than in the control 30min group. Increases in 8-isoprostane and myocardial Ca2+ concentrations were significantly inhibited in both hANP groups.ConclusionsThis study demonstrated that hANP ameliorates ischemic reperfusion injury, improves postoperative myocardial contractility, and reduces reperfusion arrhythmias. We suggest that hANP allows aortic cross-clamping to be prolonged and thereby exerts a direct myocardial protective effect against cardiac arrest during cardiac surgery