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Biomedical subjects

M Maruko

Publications and source records attributed to M Maruko.

At least 19 recordsLinked to original sources
PubMed1992

[Open-heart surgery without donor-blood transfusion--a clinical study].

Since October 1987, 80 patients underwent open-heart surgery without donor-blood transfusion. 50 (Group I) out of these 80 cases were selected to be paired with 50 patients (Group II) who underwent open-heart surgery with homologous blood transfusion in the same period. Twelve cases (Group III) underwent open-heart surgery without homologous blood transfusion but were transfused after surgery. To decrease the homologous blood requirements, ultra-filtration system as well as conservation and autotransfusion of autologous blood was employed. Peripheral blood count, blood chemistry for liver and renal function were analyzed and compared among these three groups. Although hematocrit of Group I was lower than that of Group II until the third postoperative day, there was no difference after the seventh postoperative day. The platelet count was more in Group I than in Group II or III on the first and the seventh postoperative day. The level of lactate dehydrogenase was higher in Group II than in Group I. Total bilirubin was more elevated in Group II than in Group I on the first and the fourteenth postoperative day. Direct bilirubin was also higher in Group II than in Group I till fourteenth postoperative day. Five cases in Group II fulfilled the criteria of the serum hepatitis. Blood urea nitrogen and creatinine were less in Group I than in Group II. The duration of the intra-tracheal intubation was shorter in Group I than in Group II or III. There was no difference in postoperative dosage or duration of catecholamines among three groups.(ABSTRACT TRUNCATED AT 250 WORDS)

Adolescent↗
PubMed1991

[A retrospective study of ruptured abdominal aortic aneurysms--association with respiratory function and leukocytic granular elastase].

Fifty-two cases of abdominal aortic aneurysms including common iliac aneurysms operated on during July, 1981 and December, 1989 have been studied. They were divided into the following three of elective operation (n = 34), impending rupture (n = 5), and ruptured (n = 13) groups. Cases with abdominal operations without aneurysms were randomly selected as the control group (n = 12). Overall operative mortality was 9.6%, consisted of 30.8% of the ruptured, 20.0% of the impending rupture and 0% of the elective operation groups. Respiratory functions including FEV1.0%, V75, V50, V25 and V25/Ht were significantly lowered in the ruptured group. PaO2 of the ruptured group was also significantly lowered in comparison with both the control and the elective operation groups. Leukocytic granular elastase, playing a role of destruction of the elastin component in the pulmonary alveoli and the aortic media, was increased in the patients with ruptured aortic aneurysms, though the difference was not significant. The data suggested the possibility of aneurysm rupture in case with elevated leukocytic granular elastase. Surgery for abdominal aortic aneurysm, even in cases with decreased pulmonary function, should be considered aggressively to elimination of ominous result of aneurysm rupture.

Aged↗
PubMed1991

[Congenital bicuspid aortic valve associated with aberrant coronary artery origin: a case report].

A 61-year-old man with congenital bicuspid aortic valve associated with aberrant coronary artery origin is presented. His aortic valve was severely stenotic with marked calcification. At the aortic valve replacement, it was found that the valve was markedly calcified and the bicuspid valve and both coronary ostia were very close to each other in a posteriorly positioned sinus of Valsalva. There have been a few reports concerning the combination of the bicuspid aortic valve and aberrant coronary artery origin, and it is well known that the bicuspid aortic valve more frequently accompanies short left main trunk or left coronary arterial dominance than a normal aortic valve. Some genetic mechanisms surrounding the coronary artery, aortic valve and aorta are suggested to occur with such anomalies.

Aortic Valve↗
PubMed1990

[Membranous obliteration of the inferior vena cava in the hepatic portion--postmortem study of a rapidly deteriorated aged case].

A 67-year-old female of Budd-Chiari syndrome was rapidly deteriorated and died. Autopsy revealed membranous obliteration of the inferior vena cava in the hepatic portion with a small hole. The inferior vena cava and right hepatic vein contained fresh and organized thrombi. The left hepatic vein was patent and opened above the membrane. The onset and the clinical course of this case seem to be atypical, probably because of the patent left hepatic vein and a small hole of the membrane. We call attention such a rare case in managing Budd-Chiari syndrome.

Aged↗
PubMed1990

[A case report of abdominal aortic aneurysm complicated by left-sided inferior vena cava].

Left-sided inferior vena cava (IVC) was identified preoperatively in the case of abdominal aortic aneurysm. At operation, the left-sided IVC and bilateral common iliac veins were severely pressed by the huge aneurysm, and the walls of these vessels were thin and fragile at the site adhered to the aneurysm. Careful dissection around the common iliac arteries resulted in a successful operation. Without an awareness of such anomaly, accidental injury of IVC and the common iliac veins may occur. Preoperative diagnosis and accurate information from echography, CT scan, and venography of the vena cava are recommended in such rare cases.

Aged↗
PubMed1988

[Aorto-caval fistula due to a ruptured abdominal aortic aneurysm--an emergency operation following echoic diagnosis].

A successful emergency operation for a 75-year-old man with aorto-caval fistula secondary to rupture of the abdominal aortic aneurysm is reported. A definite diagnosis of aorto-caval fistula was made by echography with characteristic engorgement of the caval vein. Clinical signs and symptoms characterized by lung edema, sudden onset, and circulatory collapse were also noticeable. In the operation, the fistula was closed via inside of the aneurysm with several mattress sutures following control of aortic flow and opening of the aneurysm. Back-flow of the blood through the fistula was readily controlled by finger tip. The aneurysm was replaced conventionally by a vascular prosthesis. There might be several suitable surgical selection available properly to individual case. No delay in surgical treatment depending on definite diagnosis by echography in such urgent condition should be stressed.

Aged↗
PubMed1987

[Peripheral neuroepithelioma in the retroperitoneum; a case report and a review of the literature].

A 30-year-old man with peripheral neuroepithelioma which was present in the retroperitoneum underwent surgical treatment under the diagnosis of germ cell tumor. Subsequently he died of local recurrence and multiple metastases to the liver seven months after surgery. To our knowledge, this is the second case of peripheral neuroepithelioma which was observed in the retroperitoneal space in the literature of the world. We also reviewed 20 cases of peripheral neuroepithelioma reported in Japan.

Adult↗
PubMed1985

[Continuous wave Doppler assessment of prosthetic valves in the mitral position: comparison of the St. Jude medical mechanical valve and the porcine xenograft valve].

To assess the opening function of prosthetic valves in the mitral position with special reference to the type and size of the valve and the years since replacement, we recorded maximum flow velocity through the mitral orifice using continuous wave Doppler echocardiography for 50 patients with mitral valve replacement and 15 normal subjects. There were 33 patients with St. Jude Medical valves and 17 with porcine xenograft valves. An ultrasonic transducer was placed over the left ventricular apex and the direction of the ultrasonic beam was positioned to be parallel with mitral flow using the Doppler audio signals. A pressure gradient was calculated from continuous wave Doppler flow velocity with a simplified Bernoulli's equation proposed by Hatle et al. The peak and mean maximum flow velocity, mean pressure gradient across the valve and the pressure half time were measured to evaluate the opening function of the prosthetic valve. The results were as follows: All four measurements were significantly larger in patients with valve replacements than in normal subjects, and were significantly increased in patients with porcine xenograft valves compared to those with St. Jude Medical valves. The opening function was well maintained in patients having larger valves than in those having smaller ones in the group of St. Jude Medical valve replacement. In patients who had porcine xenograft valve for four years or more, the opening function was decreased the more years they had been implanted. We conclude that continuous wave Doppler echocardiography is a useful noninvasive method for the quantitative assessment of the diastolic opening function of the prosthetic mitral valve.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗
PubMed1985

[A comparative study of experimental models for cardiac preservation through orthotopic transplantation].

Various kinds of models for canine heart preservation were evaluated through orthotopic transplantation. Following warm ischemic (WIT) and preservation times (PT), donor hearts were orthotopically transplanted to recipients and observed for 2 hours. The study was divided into four groups. A heart-lung preparation (Group A) was preserved by coronary perfusion with diluted blood for an hour following 15-minute WIT in A-1 (n = 33), and 2 hours following 30-minute WIT in A-2 (n = 19). Following 30-minute WIT, the heart (Group B) was preserved for an hour by coronary perfusion with diluted blood in B-1 (n = 20), a modified Krebs solution in B-2 (n = 14), and a EL-solution in B-2 (n = 14). Following 30-minute WIT, the heart (Group C) was preserved for 2 hours by a Langendorff's model with coronary perfusion using perfluorochemical in C-1 (n = 5) and Hydroxyethyl starch in C-2 (n = 1). In Group D, electromechanical arrest of the heart and coronary vascular washout were performed in D-1 (n = 8) with K+ cardioplegia, D-2 (n = 8) with K+-verapamil cardioplegia, and D-3 (n = 5) with Collins M-verapamil cardioplegia. The heart was then removed and suspended in the same solution. The graft was preserved at 4 degrees C for 6 hours in D-1 and D-2, and 24 hours in D-3. Fourty-eight % in A-1 and 26% in A-2 were successfully transplanted.(ABSTRACT TRUNCATED AT 250 WORDS)

Animals↗