M Matsumoto

Publications (8)1.65 Total impact

• Article: [Evaluation of thoracography for secondary pneumothorax in elderly people].

  H Matsubara, Y Miyauchi, T Kunimitsu, H Matsuoka, T Ichihara, T Uchida, N Oyachi, H Okuwaki, S Suzuki, M Matsumoto
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  ABSTRACT: The thoracoscopic surgery for patient with pneumothorax has been considered to be safe and easy. In recent years, there is a growing number of secondary pneumothorax due to advanced pulmonary emphysema in elderly patients. To confirm the existence of adhesion and the site of air leakage are important prior to surgery. In our institution, thoracography was performed before surgery in 9 cases of emphysema and secondary pneumothorax over 60 years old patients. The mean age was 72.2 years old and all patients were male. Air leakage and its site could be identified in 6 cases by thoracography. In the remaining 3 cases, adhesion sites were identified. There were no complications in all cases. The operation time was 117 minutes, and blood loss was 9.9 ml in average. The mean postoperative drainage period was 1.6 days and total hospital stay was 5.9 days. We conclude that the thoracoscopic surgery can be performed more safely by obtaining information of thoracic cavity using thoracography before surgery.
  Kyobu geka. The Japanese journal of thoracic surgery 04/2011; 64(4):296-8.
• Article: [Aortic valve replacement and hemiarch replacement in a patient with a porcelain aorta].

  Y Okamoto, K Sakakibara, H Inoue, S Suzuki, S Shindo, M Matsumoto
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  ABSTRACT: We report a case of aortic valve replacement and hemiarch replacement with reconstruction of the brachiocephalic artery in a patient with a porcelain aorta. A 65-year-old man was admitted to the hospital for aortic stenosis. Computed tomography demonstrated severe aortic calcification and extensive calcification covering a wide area of the aorta. The echocardiography showed a highly calcified aortic valve and a pressure gradient of 109 mmHg across the aortic valve. At surgery, calcification of the ascending aorta was severe and involved its entire circumference. Therefore, 2 cannulae were inserted to the right axillary and right femoral arteries for extracorporeal circulation. We performed replacement of the ascending aorta and hemiarch with reconstruction of the brachiocephalic artery under circulatory arrest and antegrade cerebral perfusion, as well as aortic valve replacement with a 21 mm St. Jude Medical mechanical valve. He had no major cardiac complications during the postoperative course, and was discharged on postoperative day 33.
  Kyobu geka. The Japanese journal of thoracic surgery 08/2009; 62(7):538-41.
• Article: [Aortic valve replacement and repeat coronary artery bypass grafting in a patient with a patent internal thoracic artery bypass graft; report of a case].

  Yuki Okamoto, K Shimura, M Katsu, H Inoue, S Kaga, K Ogata, S Suzuki, S Shindo, M Matsumoto
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  ABSTRACT: We report a case of aortic valve replacement and repeat coronary artery bypass grafting in a patient with a patent internal thoracic artery bypass graft. A 77-year-old man, who underwent coronary artery bypass grafting (CABG) 10 years ago, was admitted to the hospital for aortic stenosis and angina pectoris. Transthoracic echocardiography demonstrated severe aortic calcification with an 86 mmHg gradient across the aortic valve. Coronary angiography demonstrated the patency of all grafts and 90% stenosis of the left circumflex coronary artery. At surgery, a full median sternotomy was performed. The adhesions around the heart and great vessels were severe and the left internal thoracic artery (LITA) was found adherent to the heart and sternum. The LITA and saphenous vein graft (SVG) graft were dissected carefully. Retrograde coronary sinus (CS) perfusion was performed with antegrade myocardial protection for cardiac arrest. We performed aortic valve replacement (AVR) with a 17 mm St. Jude Medical Regent Valve and CABG to the circumflex artery with the saphenous vein under cardiopulmonary bypass. His postoperative course was uneventful. He was discharged from our hospital without major complications.
  Kyobu geka. The Japanese journal of thoracic surgery 06/2009; 62(5):413-6.
• Article: [Recurrent cardiac myxoma that developed rapidly in a short period].

  Y Okamoto, K Shimura, Y Mitsumori, M Katsu, S Kaga, H Inoue, K Ogata, S Suzuki, S Shindo, M Matsumoto
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  ABSTRACT: A 55-year-old woman, who had undergone extirpation of left atrial myxoma 3-years before, was admitted to our hospital with dyspnea. Chest computed tomography revealed a low density mass in the left atrium (LA) with a diameter of 54 mm. Transthoracic echocardiography showed that the mass was attached to the left atrial septal wall and had a pendulum-like movement. We urgently performed an operation for recurrent left atrial myxoma. Through atrial transseptal approach, a huge myxomatus tumor was observed in the LA. The stalk was on the endocardium at the cranial side of the previous autologous pericardial patch. The tumor was completely excised along with the patch. We repaired the disrupted endocardium and performed Dacron patch repair of the atrial septal defect. The patient recovered uneventfully and was discharged 14 days after surgery. The excised tumor was found to be myxoma on pathological examination similar to the previous tumor. We report a case of recurrent left atrial myxoma with rapid growth in a short time period.
  Kyobu geka. The Japanese journal of thoracic surgery 03/2009; 62(2):129-32.
• Article: [Embolism of the lower limb caused by native aortic valve thrombosis].

  Hiroshi Amano, K Kubota, A Kojima, S Shindo, S Yoshii, M Matsumoto
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  ABSTRACT: Native aortic valve thrombosis is an uncommon event with heart valve disease, during cardiac catheterization, bacterial endocarditis, or a hypercoagulative state as in antiphospholipid antibody syndrome. We report a case of thrombus formation on a native aortic valve, which was found by the transesophageal echocardiography during thrombectomy of the lower limb. We supposed that the atheromatous plaque of aortic valve was related to thrombus formation.
  Kyobu geka. The Japanese journal of thoracic surgery 10/2006; 59(10):900-3.
• Article: A comparison of the inflammatory response and the recovery of bowel function between trans- and extraperitoneal approaches of abdominal aortic aneurysmectomy.

  S Shindo, K Kubota, A Kojima, M Matsumoto
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  ABSTRACT: To determine whether surgical stress is less with transperitoneal or extraperitoneal abdominal aortic aneurysmectomy, blood concentrations of inflammatory cytokines and other inflammatory markers with recovery of bowel function were examined. Patients who underwent abdominal aortic aneurysmectomy electively via the transperitoneal (T-group; n=15) or the extraperitoneal approach (E-group; n=17) were evaluated. Inflammatory cytokines (interleukin[IL]) IL-6, IL-8, C-reactive protein concentrations, and systemic inflammatory response syndrome score were determined before operation and after operation on days (POD) 1, 3, 7, and 14. Recovery of bowel function was estimated by the time taken for resumption of bowel movement and oral intake, and by the volume of fluid collection from the nasogastric tube. Cytokine (IL-8) concentrations were higher in the T-group than the E-group with significant difference on POD 7 (4.8+/-0.5 versus 3.4+/-0.2 pg/mL, respectively; P=0.02). Recovery of bowel function and oral intake were earlier, and the volume of fluid collection from the nasogastric tube was smaller in the E-group than the T-group significantly. Early recovery of bowel function and low concentration of inflammatory cytokines suggest that the extraperitoneal approach to the abdominal aorta is less stressful to the transperitoneal approach. Postoperative inflammatory response may mainly depend on damage of the bowel in the operation of the abdominal aortic aneurysm.
  International angiology: a journal of the International Union of Angiology 01/2006; 24(4):355-8. · 1.65 Impact Factor
• Article: [Chondrosarcoma of the chest wall].

  H Sakurai, S Suzuki, Y Dobashi, K Takano, S Shindo, M Matsumoto
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  ABSTRACT: We report 2 patients with chondrosarcoma of the chest wall. They were a 67-year-old woman (case 1) with an anterior chest wall tumor and a 68-year-old woman (case 2) with a painful rib tumor. Their computed tomography (CT) both revealed calcified tumors. Case 1 underwent a wide resection by partial sternectomy, with free surgical margins. Case 2 underwent tumor resection with the posterior part of the 3rd rib, with positive surgical margin in the vertebral site, and received adjuvant radiotherapy. Both patients were pathologically diagnosed as having grade II chondrosarcoma. In their postoperative courses, they are free from recurrence. Wide resection is likely to be the key to successful management of chest wall chondrosarcoma.
  Kyobu geka. The Japanese journal of thoracic surgery 09/2005; 58(9):779-82.
• Article: [Prognosis of resected stage I bronchioloalveolar carcinoma of the lung].

  H Sakurai, Y Dobashi, E Mizutani, H Matsubara, S Suzuki, K Takano, S Shindo, M Matsumoto
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  ABSTRACT: In this retrospective study, we investigated the prognosis of 25 patients with resected bronchioloalveolar carcinoma (BAC) of 3.0 cm or less in diameter. We assigned a diagnosis of BAC for non-invasive tumors as defined by the World Health Organization (WHO) classification. The patients ranged in age from 47 to 78 years with an average of 64.0 years. Eighteen patients (72%) were male and 7 patients (28%) were female. All the patients underwent complete resection. As the mode of surgical resection, at least lobectomy was performed in 84%. Sections of the resected tumor were stained by HE and Elastica, and then examined by light microscopy. The tumors ranged in size from 0.5 to 3.0 cm with an average of 1.9 cm. Neither pleural involvement nor vascular permeation was seen in BACs. There was also no lymph node involvement for BACs. The 5-year disease-free survival rate of all 25 patients with BAC was 100%. The unequivocally recognizing invasive features by morphology is important for a prospect of the prognosis of resected BACs.
  Kyobu geka. The Japanese journal of thoracic surgery 07/2004; 57(6):440-3.