1.A Case Report of Abdominal Aortic Aneurysm with Isolated Left-side Inferior Vena Cava.
Takashi Hattori ; Yasunori Watanabe ; Shinya Kanemoto
Japanese Journal of Cardiovascular Surgery 1997;26(3):204-206
Isolated left-side inferior vena cava is rare, there being only four cases associated with abdominal aortic aneurysm reported so far in the Japanese literature. A 72-year-old man was admitted to our hospital for the evaluation of an abdominal pulsatile mass. CT scan revealed abdominal aortic aneurysm with isolated left-sided inferior vena cava. Aneurysmectomy and bifurcated graft replacement was performed with retracting inferior vena cava. The postoperative course was uneventful.
2.Use of Medical Leech for Alleviating Postoperative Venous Congestion Following Distal Digit Replantation.
Yasunori HATTORI ; Kazuteru DOI ; Fujio KAWAKAMI ; Yasuhiro HIURA
Journal of the Japanese Association of Rural Medicine 1997;46(1):23-26
In distal digit replantation, venous repair is difficult or technically imposible. Postoperative venous congestion following replantation was treated with the application of medical leech. No infection was developed and no patients were required to undergo transfusion. The use of medical leech is safe and effective method of providing temporary venous drainage in replanted digits.
3.Autologous Blood Donation in Open-Heart Surgery in Cooperation with the Red Cross Blood Center.
Yasunori Watanabe ; Yuji Hiramatsu ; Takashi Hattori ; Katsutoshi Nakamura ; Seigo Gomi ; Shinya Kanemoto
Japanese Journal of Cardiovascular Surgery 1998;27(1):24-29
An investigation on the efficacy of preoperative autologous blood donation in open-heart surgery was made using frozen red blood cells and MAP red blood cells in cooperation with the Red Cross Blood Center. In 109 cases which received the donation, the rate of cases which received no homologous blood transfusion was 93.6% (35.3% in the cases without donation). Even in the cases of redo operation or aortic surgery, in which extensive blood loss is expected, 75% of those given a donation of 1600-2000ml frozen blood required no homologous blood transfusion. The hemoglobin concentration in the cases which received blood donation for more than 4 weeks did not decrease, indicating that safe donation is feasible. The aforementioned frozen and MAP blood preparations can be preserved for a long period so that blood donation can be started even before deciding on the date of operation. Also, its usefulness is not affected by the postponement of the operation. Furthermore, there was no problem in safety with respect to transfer, treatment, and storage of the autologous blood in cooperation with the Red Cross Blood Center, suggesting that this is useful as a preoperative donation method, especially in small- and middle-scale hospitals, which have no separate blood centers. However, there were 2 cases in which aggravated symptoms were noted after blood collection. Therefore, it is important to carefully select cases for autologous blood donation in open-heart surgery and it is desirable to set up appropriate donation schedules.
4.A case of Aortic Valve Endocarditis with Splenic Abscess.
Takashi Hattori ; Yasunori Watanabe ; Shinya Kanemoto ; Yuichiro Kaminishi ; Toshiro Kamoshida ; Atsushi Takahashi
Japanese Journal of Cardiovascular Surgery 1998;27(6):387-389
A 25-year-old man was admitted with high fever and heart murmur. Echocardiogram showed left ventricular chamber dilatation and vegetations attached to the aortic valve. Blood cultures obtained on admission revealed Streptococcus viridans. Despite adequate antibiotic therapy, congestive heart failure progressively worsened and large splenic abscesses were detected by computed tomography. Urgent aortic valve replacement and splenectomy were performed. The aortic valve was bicuspid and markedly destroyed. Pathology of the spleen showed findings consistent with large infarct and abscesses due to septic emboli. The postoperative course was uneventful.
6.Iatrogenic distal femur fracture following medial femoral supracondylar bone graft harvest: a case report and finite element analysis
Sotetsu SAKAMOTO ; Yasunori HATTORI ; Kazuteru DOI ; Hiroki YAMAGATA ; Norihiro NISHIDA ; Takashi SAKAI
Journal of Rural Medicine 2022;17(4):270-275
Objective: This report presents a case of supracondylar femur fracture with finite element analysis and discusses its causes and prevention.Patient and Methods: A 53-year-old man presented with right talar osteonecrosis after osteosynthesis for a talus fracture. A medial femoral condyle-free vascularized bone graft (size, 20 × 12 × 17 mm) from the contralateral femur was performed, including the posteromedial cortical corner. The patient suffered a donor-site supracondylar femoral fracture while standing up from a cross-legged sitting position on the bed on postoperative day 6. The fracture was treated with intramedullary nailing. We analyzed the effects of the location of the bone graft harvest in an intact model using the three-dimensional finite element method (FEM).Results: The talar necrosis and the femur fracture healed. The FEM result revealed that the longitudinal axial pressure had minimal effect on the femur; however, the stress around the bone defect increased with rotation, especially in the posteromedial bone defect model.Conclusion: Harvesting the bone graft should not include the posteromedial corner of the supracondylar femur. The patient should strictly limit the motion of torsional stress, such as standing from a cross-legged sitting position or pivoting turn.