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Biomedical subjects

M Nobori

Publications and source records attributed to M Nobori.

At least 19 recordsLinked to original sources
PubMed2001

Successful management of tracheo-innominate artery fistula with endovascular stent graft repair.

Tracheo-innominate artery fistula is a highly lethal complication after tracheostomy. A 37-year-old man who had undergone a tracheostomy 14 years earlier because of dysphagia after brain surgery had a tracheo-innominate artery fistula with exsanguinating hemorrhage from his tracheostomy site. After temporary control of the bleeding, a stent graft was implanted in the innominate artery through the brachial artery. The patient recovered uneventfully and remained well 14 months after the procedure, with no sign of infection. Endovascular stent grafting may be the treatment of choice for patients with tracheo-innominate artery fistula.

Adult↗
PubMed2000

Tracheoesophageal fistula after blunt chest trauma: successful diagnosis by computed tomography.

A case of tracheoesophageal fistula after blunt trauma is reported. A 27-year-old man who suffered from an automobile traffic accident complained of strong choking after drinking water. Computed tomography demonstrated a defect between the esophagus and the trachea just above the carina. Acquired tracheoesophageal fistula was suspected and promptly confirmed by contrast esophagogram. The defects of the trachea and esophagus was repaired by primary suture and buttressed using a pedicled intercostal flap. The postoperative course was uneventful.

Accidents, Traffic↗
PubMed2000

Anatomical segmentectomy of the head of the pancreas along the embryological fusion plane: a feasible procedure?

BACKGROUND: Less extensive resection of the head of the pancreas has been the procedure of choice recently for low-grade malignant neoplasms. The anatomical detail of the head of the pancreas is currently insufficient for segmental resection along the embryological fusion plane. METHODS: The anatomy of the head of the pancreas was analyzed in 31 consecutive autopsy specimens. An anterior (n = 10) or posterior (n = 10) segmentectomy of the head of each pancreas was performed along the macroscopically found fusion plane. The pancreatic arteries, the portal vein, the bile duct, and the pancreatic duct were visualized by injecting 3 silicon dyes of different colors. Another 11 specimens were examined by pancreatography before and after anterior (n = 5) or posterior (n = 6) segmentectomy. Eight of these 11 specimens were stained immunohistochemically to reveal the distribution of pancreatic polypeptide cells after segmentectomy. RESULTS: The cleavage between the anterior and posterior segments was discovered at the anterior inferior edge or at the posterior superior edge of the head of the pancreas. Anterior segmentectomy was accomplished while preserving the anterior and posterior pancreaticoduodenal arcades and the lower bile duct in the posterior segment. Posterior segmentectomy involved the removal of the lower bile duct and the posterior pancreaticoduodenal arcades. Pancreatography after segmentectomy showed the division of the ducts of Wirsung and Santorini with the peripheral branches. The immunohistochemical boundary of pancreatic polypeptide cells coincided with the surgical plane. These results showed the anterior and posterior segments were originated from the embryologically dorsal and ventral primordia, respectively. CONCLUSIONS: The current anterior or posterior segmentectomy of the head of the pancreas corresponded to the resection of the embryologically dorsal or ventral primordium, respectively. Anterior segmentectomy of the head of the pancreas might be a clinically applicable procedure; however, posterior segmentectomy involving the resection of the lower bile duct may be impractical.

Adult↗
PubMed2000

Anterior tributaries of the portal vein at the superior margin of the pancreas: is "tunneling" procedure safe during pancreatic surgery?

BACKGROUND: It is widely believed that using the "tunneling" procedure during pancreatoduodenectomy is a safe maneuver because the anterior tributaries of the portal vein (PV) are absent or very rare. METHODS: The head of the pancreas with the duodenum and the common bile duct (CBD) was obtained from 22 autopsy cases. Three colors of silicon-polymerase dyes were injected into the pancreatic artery, PV, and bile duct. The tributaries of the PV at the superior margin of the pancreas were studied. RESULTS: There was no anterior branch of the intrapancreatic PV. The anterior superior pancreaticoduodenal vein (ASPDV) gave a definite branch to the anterior aspect of the PV at the superior margin of the pancreas in 4 of 22 cases. When the posterior superior pancreaticoduodenal vein (PSPDV) was located in front of the CBD (5 of 22 cases), the ASPDV and PSPDV had a thick common trunk at the right side of the PV. In these 5 cases, no individual branch from the ASPDV was found at the anterior aspect of the PV. CONCLUSION: PV sometimes has a definite anterior tributary at the superior margin of the pancreas; this must be kept in mind to perform the tunneling procedure during pancreatic surgery.

Adult↗
PubMed2000

[Myocardial ischemia during cesarean section in a patient with placental abruption].

A 27-year-old woman (38 week pregnant) was admitted to an obstetric hospital with an acute severe abdominal pain. At that time, the fetal heart sound was not audible. The diagnosis of placental abruption was made and she underwent an emergency cesarean section (C/S) under general anesthesia. She had anemia which became worse in the first few hours after C/S, requiring blood transfusion. ST depression was also present in the ECG during this period. Subsequently, we found an increase in myocin light chain, but not in troponin-T. On the 2nd postoperative day, pulmonary edema appeared and DIC was suspected. We treated her with nitrates, diuretics, protease inhibitors and oxygen by mask. She was discharged on 14th postoperative day with no other complications. Cardiac echogram showed no abnormalities, but a borderline change was seen in her exercise ECG. Depression of the ST segment has been reported in C/S patients, but this does not indicate myocardial ischemia (MI) nor treatment is necessary in most cases. In our case, the diagnosis was not conclusive, but in view of the risks associated with MI, patients with placental abruption should be managed strictly as if they have MI.

Abruptio Placentae↗
PubMed1999

[Vascular trauma].

Vascular trauma is essentially acute arterial obstruction, often combined with hemorrhage, fracture, and infection. It can be both life-threatening and limb-threatening and needs an emergency operation. In vascular trauma patient, multiple fracture and organ injury, such as brain, lung, liver, spleen, kidney, or gastrointestinal tract should be evaluated to decide treatment priority. When the pulse distal from the injured site is absent or diminished, vascular trauma is most likely and reconstruction should be accomplished within "the golden time (6-8 hours)". Intimal damage followed by platelet aggregation and thrombus formation will necessitate resection and repair of the site instead of simple thrombectomy. Although autogenous vein is the first choice, artificial graft can be implanted for short segment in non-infected field.

Blood Vessels↗
PubMed1997

Does bile spillage during an operation present a risk for peritoneal metastasis in bile duct carcinoma?

Whether bile spillage during operation presents a risk for peritoneal metastasis in the treatment of bile duct carcinoma was studied in 15 patients (12 with bile duct cancer, 3 with cancer of the papilla of Vater) who had all undergone a pancreatoduodenectomy. Preoperative bile was sampled through a percutaneous transhepatic biliary drainage catheter. Nine patients with bile duct cancer and one with cancer of the papilla of Vater showed positive bile cytology. The operative bile was obtained at the hepatic duct stump after a resection of the tumor-bearing bile duct. The operative bile in 10 patients with positive preoperative bile was found to be positive, while that in the five patients with negative preoperative bile was negative. Thus, the specificity of operative bile was identified as 100%. Moreover, in five patients with preoperative positive bile, saline irrigation of intrahepatic bile duct after a full recovery of hepatic bile revealed cancer cells to remain in the intrahepatic biliary trees. The viability of preoperative bile was 61%-97% with 1 x 10(4)-2.4 x 10(5) tumor cells, whereas there was a 41%-97% viability with 7.6 x 10(4)-10.4 x 10(5) tumor cells in the operative or irrigated bile. Accordingly, the patients with preoperative positive bile are thus suggested to be at high risk of inducing peritoneal metastasis due to the inadvertent spillage of hepatic bile at the time of resection of a bile duct tumor.

Adenocarcinoma↗
PubMed1997

Surgical management of late esophageal perforation.

Over sixteen years we have gained experience in the delayed surgical management of esophageal rupture in nine patients who received treatments more than 24 hours after perforation. The causes of perforation were Boerhaave's syndrome or barotrauma in four patients, foreign bodies in two, and other causes in three. Three patients presented in septic shock and four in respiratory failure. Three surgical options were used for treatment: simple thoracic drainage in two patients, T-tube placement in four, and esophagectomy with secondary reconstruction in three. Eight patients (89%) survived. T-tube placement was effective in that it was a one-stage operation which could be used on severe esophageal injuries in patients in poor general condition. Three patients who underwent esophagectomy and secondary alimentary restoration required long hospital stays (119,201, and 648 days). Although the number of cases is small, T-tube insertion for the late management of esophageal rupture appears to be a simple and effective method which avoids the postoperative complications associated with primary closure or two-stage operations.

Drainage↗
PubMed1997

A simple stenting method for management of hepatic ductal injury secondary to blunt abdominal trauma: two case reports.

We report two cases of liver injury with hepatic ductal disruption after blunt abdominal trauma. The first case involves a 23-year-old male. Because the bifurcation of the hepatic duct was longitudinally torn, two stenting catheters were inserted toward the right and left hepatic ducts without suture closure of the tear. The patient is well 10 years after the injury. The second case involves a 22-year-old male who suffered an infarction of the inferior portion of the medial segment of the left hepatic lobe as well as a laceration of the left hepatic duct, a 50% circumferential tear. A stenting catheter was introduced into the left hepatic duct, but the defect was not sutured. The patient is well 1.5 years after the injury. The catheter stenting method without suture repair or defect plasty is a simple and effective way to manage hepatic ductal injury.

Abdominal Injuries↗
PubMed1996

Pituitary apoplexy after subtotal thyroidectomy in an acromegalic patient with a large goiter.

A case of pituitary apoplexy occurring after subtotal thyroidectomy in an acromegalic woman with a large adenomatous goiter is described. The patient had severe apnea because the large goiter was causing airway compression. Prior to the planned hypophysectomy, a subtotal thyroidectomy was performed to relieve tracheal stenosis. Shortly after the operation, the patient developed a headache that lasted for several days. The serum levels of growth hormone and somatomedin-C spontaneously normalized seventeen days after this episode and have remained normal for two years. Pituitary apoplexy was thought to have caused the observed results without deterioration of the pituitary function.

Acromegaly↗
PubMed1995

Evolution of Mirizzi syndrome with biliobiliary fistula.

The mechanisms of fistula formation were analyzed in eight patients with Mirizzi syndrome with biliobiliary fistula. The fistula was type 1 in three patients and type 2 in five, according to the Corlette-Bismuth classification. The apparent mechanisms of fistula formation include inflammation of the gallbladder, its subsequent fusion to the bile duct, and increase in the internal pressure due to either contraction of the gallbladder or multiple stones. However, no predisposing conditions other than a longstanding history of cholelithiasis have been suggested. Differences in the type of fistula are considered to be due to the mode of fusion of the gallbladder to the bile duct, and the size of the perforation, which is apparently determined by the area in contact with the stone.

Adult↗
PubMed1994

Anastomotic recurrence at hepaticojejunostomy in a long-term survivor of bile duct carcinoma: report of a case.

A rare case of autopsy-proven recurrence 10 years after a radical resection for lower bile duct carcinoma is herein reported. The subject is a 53-year-old man who underwent a curative resection of distal bile duct carcinoma with pancreatoduodenectomy in 1981. The lesion was a 1.0 x 1.5 x 1.0 cm well-differentiated papillotubular adenocarcinoma invading the fibromuscular layer of the bile duct with a slight infiltration to the lymphatics but without any extension to the vessels, nerves, connective tissues, or nodes. The patient demonstrated a recurrence 10 years after the initial operation and died 4 months later. An autopsy revealed a 2.0 x 2.5 x 1.6 cm mass at the anastomotic site of hepaticojejunostomy without any distant metastases. Although a late anastomotic recurrence after more than 10 years is unique, this case highlights the difficulty of the operative eradication of bile duct carcinoma. As a result, all possible maneuvers either during or after operation to promote the prophylaxis of recurrence are warranted.

Adenocarcinoma, Papillary↗
PubMed1994

Acute ischemia of the lower legs from blunt abdominal trauma: an unusual cause of atheroembolism--case report.

A 79-year-old man sustained blunt abdominal trauma in an automobile crash, resulting in intra-abdominal bleeding and acute ischemia of the lower extremities. Angiography demonstrated occlusion of the popliteal arteries bilaterally. He died of multiple organ failure despite immediate surgical intervention. Pathologic examination revealed diffuse atheroembolism of the lower legs.

Abdominal Injuries↗
PubMed1994

Blood supply of the parathyroid gland from the superior thyroid artery.

BACKGROUND: There is considerable controversy about the arterial supply to the superior parathyroid glands. Knowledge of this blood supply should be important for the surgeon performing thyroid and parathyroid operations. The purpose of this investigation was to document whether the superior parathyroid glands receive their blood supply from the superior thyroid artery. METHODS: We injected contrast material into the superior thyroid artery in 52 cadavers and determined the arterial blood supply to the parathyroid glands by using a dissecting microscope. RESULTS: The upper parathyroid gland was identified in 51 instances and the upper and lower glands in 26 instances on the side of injection. Of 92 parathyroid glands identified, 57 glands (62%) had a single artery, 26 (28%) had two, and 9 (10%) had three or more arteries. In 9 (45%) of the 20 cases specifically examined, a distinct anastomosing branch was identified between the inferior and the superior thyroid arteries, from which the upper parathyroid artery arose. CONCLUSIONS: Our study documented that the superior thyroid artery almost always supplies the upper parathyroid glands. Forty-five percent of the subjects had a distinct anastomosing branch between the superior and inferior thyroid arteries, which should be kept intact at operation to preserve the upper parathyroid function. One third of the parathyroid glands have two or more parathyroid arteries.

Arteries↗
PubMed1993

A case of an aortocolic fistula occurring 27 years after aorto-femoral bypass surgery, treated successfully by surgical management.

The secondary aortoenteric fistula (AEF) is a rare but grave complication of aortic reconstructive surgery. We report herein a case of an aortocolic fistula which occurred 27 years after an aortofemoral bypass. A 69-year-old man was admitted to hospital following a sudden episode of melena. He had undergone aortofemoral bypass surgery with a prosthetic graft 27 years previously for occlusive disease of the right external iliac artery. Colonofiberscopy, CT scan, and angiography were performed, and an aortocolic fistula due to an aortic anastomotic pseudoaneurysm was diagnosed. The first-stage operation, being resection of the previously implanted graft, right hemicolectomy, and aortic stump closure were carried out with concomitant axillo-right femoral bypass. A femoro-femoral crossover bypass was performed in the second stage and the patients recovery followed uneventfully. This case constitutes the longest postoperative interval for an AEF recorded in the English literature.

Aged↗
PubMed1992

Vasculitis and pyrexia associated with superficial spreading gastric carcinoma.

A case of low-grade fever developing about a month before the discovery of gastric carcinoma is reported. No findings of infection or collagen disease were revealed. The fever continued for about 3 months, but promptly disappeared after surgical removal of the tumor. A superficial spreading mucosal carcinoma with minimal invasion to the submucosa was seen in the antrum, showing the features of poorly differentiated adenocarcinoma. In addition, unique venous inflammation was recognized beneath and around the neoplasm. Arteries and lymph vessels did not exhibit any inflammatory changes. It was presumed that the gastric carcinoma had induced phlebitis, which subsequently brought about the fever. As to the pathogenetic mechanism, it was suggested that a substance produced by the carcinoma cells flowed into nearby veins to induce the phlebitis.

Adenocarcinoma↗
PubMed1992

[Operative strategy for thoracoabdominal aortic aneurysm with concomitant reconstruction of four main abdominal branches].

A thoracoabdominal aortic aneurysm (TAAA) involving major abdominal branches remains still difficult to be managed. From 1983 to 1990, we successfully operated five such cases. Our operative strategy for TAAA which necessitates concomitant reconstruction of four major abdominal branches is i) to utilize temporary bypass to maintain distal perfusion during aortic cross-clamping, ii) to reconstruct bilateral renal arteries prior to aortic clamping in order to shorten renal ischemic time as much as possible, iii) to reconstruct celiac and superior mesenteric arteries by Crawford's method, iv) to reconstruct two pairs of intercostal arteries by using diagonal anastomosis in the proximal site, and v) to divide the left renal vein temporarily for easy manipulation of renal arteries. All five cases were recovered uneventfully. This procedure, in which the renal ischemic time is saved as short as possible, is considered a safe and reasonable one for thoracoabdominal aortic aneurysms.

Adult↗