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R Kanno

Publications and source records attributed to R Kanno.

7 recordsLinked to original sources
PubMed1991

[Reevaluation of the unilateral pulmonary artery occlusion test--hemodynamics after lobectomy and pneumonectomy for lung cancer].

After lobectomy, it is recognized that functional as well as absolute reduction occurs in residual lobes of the operated side. So whether lobectomy is indicated or not is determined by the same criteria as those for pneumonectomy, namely, by the unilateral pulmonary artery occlusion (UPAO) test. However, is it really appropriate to use the same criteria for both lobectomy and pneumonectomy? To answer to this question, in patients with lung cancer we compared the hemodynamics after lobectomy (13 cases) and pneumonectomy (14 cases) with that at the UPAO test. After pneumonectomy, the mean pulmonary arterial wedge pressure (mPWP) was significantly lower than that on the preoperative day and at the test. It seemed that hypovolemic change occurred in the hemodynamics after pneumonectomy. After pneumonectomy, the pulmonary arteriolar resistance index (PARI) was significantly higher than the preoperative value. It was the same as that as at the time of the UPAO test. The total pulmonary vascular resistance index (TPVRI) at the time of the test was significantly higher than the preoperative value, but the TPVRI after pneumonectomy was not significantly higher. The TPVRI tended to decrease after pneumonectomy, compared to the value predicated by the test. These results indicated that some of the cases judged inoperable on the basis of the UPAO test might be operable. On the day of lobectomy, the PARI was significantly higher than the preoperative value, but significantly lower than that at the time of the test. The cardiac index (CI) was significantly higher and the mPWP was significantly lower than each preoperative value.(ABSTRACT TRUNCATED AT 250 WORDS)

Aged↗
PubMed1991

[A study of the right ventricular load at the unilateral pulmonary artery occlusion test after pneumonectomy].

After pneumonectomy, it is recognized that the absolute reduction of the pulmonary vascular bed makes the right ventricular afterload increase and can cause right heart failure in patients with low cardiopulmonary reserve. Therefore, we investigated how the right ventricular load was predicted by UPAO test, comparing hemodynamics at the time of the test with those after pneumonectomy in patients with lung cancer. At the test, the absolute reduction of the pulmonary vascular bed made the right ventricular afterload increase but the right ventricular pump function was maintained at the preoperative level by the increase of the right ventricular work load, namely, by the contraction of the right ventricle. After pneumonectomy, the absolute reduction of the vascular bed did not always make the afterload increase and in spite of the decreased preload the pump function was maintained at the preoperative level by increased heart rate. Additionally, the increase of the right ventricular work load improved during early postoperative days. It was concluded that UPAO test was apt to overestimate the right ventricular load of the postoperative day because it was done under the condition of the different compensatory function from the postoperative hypovolemic change.

Aged↗
PubMed1990

The quasi-fixed point for the linearised deciduous dentition plot.

As Masuyama has indicated, the existence of a quasi-fixed point on the linearised dentition plot is useful in forecasting the age at which subsequent teeth will erupt, once the first eruption was observed. He proposed two methods (direct and indirect) for finding this quasi-fixed point. The direct method is based on individual data obtained by longitudinal research, and the indirect method is to estimate it from the mean and standard deviation of the age of eruption. We first examined whether the two methods give the same result with Kitamura's data, which lists the ages of eruption for individuals. When we used the indirect method, the estimates in both sexes were not valid and did not coincide with those from the direct method. However, when we considered a selected group of subjects with good linearization of dentition, the results obtained from the two methods were sufficiently close. Secondly, we attempted to determine the quasi-fixed point (C, C) in many other reports published in the past. Since almost all papers on dentition have not published individual data, we could only use the indirect method. The estimates of C differed considerably, but all of the quasi-fixed points occurred in the late stages of dentition. When we excluded deciduous central incisor from the data, the range of C narrowed and the value varied from about 1.3 (20 months) to about 1.5 (31.6 months).

Age Factors↗
PubMed1990

[Hypercoagulability after surgery of esophageal carcinoma].

The purpose of this study was to determine hypercoagulability in patients surgically treated for thoracic esophageal cancer. Twenty-four patients were evaluated; 19 subjected to open chest esophagectomy and 5 closed chest blunt dissection. Six patients subjected to gastrectomy served as controls. In all test patients, preoperative coagulability was within the normal range. Immediately after surgery, however, they were in a hypercoagulable state, showing a marked decrease in platelet count, prothrombin time, antithrombin III level and plasminogen level and an increase in activated partial thromboplastin time and fibrinopeptide B beta 15-42. The controls showed almost no change. There was a close correlation between hypercoagulability on one hand and the time needed for surgery and hemorrhage during 3rd to 7th postoperative day except those with multiple organ failure whose recovery was delayed and those with leakage of anastomosis whose condition did not improve even on the 10th postoperative day.

Adult↗
PubMed1988

Physical and functional map of an amikacin-resistance plasmid isolated from a multiresistant strain of Serratia marcescens.

pTK159, a multiresistance 40-kilobase (kb) plasmid, was isolated from a clinical strain of Serratia marcescens. pTK159 was nonconjugative and carried determinants for resistance to amikacin, streptomycin/spectinomycin, sulfamethoxazole and ampicillin. A physical and functional map of pTK159 was constructed. By cloning various fragments of pTK159 in pACYC184 or pBR322, genes for resistance to amikacin, streptomycin/spectinomycin, and sulfamethoxazole were found to be located on a 2.0-kb BamHI-HindIII fragment, a 1.4-kb HindIII fragment and a 2.1-kb HindIII fragment, respectively. The map of pTK159 was compared with published maps of amikacin-resistance determinants and transposons.

Amikacin↗