A total of 56 patients undergoing coronary artery bypass grafting were allocated to two groups: the Cold group (28 patients) with cold (4°C) crystalloid cardioplegia and topical ice slush, and the Tepid group (28 patients) with tepid (32°C) blood cardioplegia delivered intermittently antegrade. The two groups were comparable in terms of preoperative New York Heart Association classification, age, gender, and number of grafts. Intraoperatively, tepid blood cardioplegia was associated with a significantly shorter cardiopulmonary bypass time and nearly uniform return of normal sinus rhythm. Cardiac output after bypass was significantly higher than before bypass only in the Tepid group. The absolute peak levels in the myocardial-specific isoenzyme of creatine kinase were higher in the Cold group (70±8IU/l) than in the Tepid group (31±5IU/l). There was a trend toward reduced incidence of perioperative myocardial infarction (0% versus 7.1%) and need for intraaortic balloon pump support (0% versus 3.6%) associated with the use of tepid blood cardioplegia. Our results suggest that intermittent tepid blood cardioplegia is a safe and effective technique for coronary artery bypass grafting.

The degree of intermittent claudication is difficult to evaluate objectively; therefore, the therapeutic efficiency of a drug is difficult to test in patients suffering from intermittent claudication. The purpose of this paper is to know whether treadmill test is useful to evaluate objectively the degree of intermittent claudication. 20 patients suffering from a peripheral arterial occlusive disease with intermittent claudication (Stage II) were investigated. PGE₁ incorporated in lipid microspheres (Lipo PGE₁) was infused (10μg/day) with one shot on 7 consecutive days into the forearm vein of patients. Painfree walking distance and maximum walking distance were measured on treadmill (3.0km/h, 5% incline). Brachial systolic pressure and ankle pressures were measured before and after exercise, and ankle/arm pressure ratio and ankle pressure difference between the pre-exercise and post-exercise values were calculated. All measurements were performed before and 7 days after beginning of treatment. Painfree walking distance was prolonged from 72.5±41.4m before treatment to 92.0±53.7m after treatment, with significant difference (p<0.01). However, no significant changes of ankle/arm pressure ratio, ankle pressure difference and maximum walking distance were observed. It is concluded that measurement of painfree walking distance on treadmill was useful to evaluate objectively the degree of intermittent claudication.

During the period between January 1975 and April 1991, 37 patients with acute arterial occulusion of the extremities were admitted to our department and were classified into 2 groups according to their causative factors, including thrombosis and embolism. Among 16 thrombosis patients with involvement of 17 limbs, 4 patients died and 6 limbs were amputated at the time of discharge. On the contrary, among 21 embolism patients with involvement of 25 limbs, 2 patients died and only one limb was amputated. Sixteen of 17 limbs with thrombosis were operated on. Arterial reconstruction was carried out initially on 5 limbs, resulting in successful limb salvage; 3 of 6 limbs which had undergone thrombectomy initially were occluded again soon after the procedure. In the end, 1 limb had to be amputated. On the other hand, 22 of 25 limbs were operated on. Three arterial reconstructions, 18 embolectomies and 1 amputation were carried out initially. All arterial reconstructions and embolectomies were successful. From these results, it was concluded that arterial reconstruction must be done initially for thrombosis patients. For the embolism patients, embolectomy is preferable.

We treated a total of 67 patients for mamushi viper (Gloydius blomhoffii) bite during a 10-year period between 2007 and 2016. The mean age of the patients was 68 years, with those aged ≥ 60 years accounting for about 80％ of all patients. Most injuries occurred between July and September in rice fields and other cropland, or in the patients’ homes. Except for 1 severe case who developed a marked thrombocytopenia immediately after the incident, the remaining 66 patients were included in the analysis. All patients received inpatient care, with a mean hospital stay of 6.8 days. There was a significant positive correlation between the size of the swelling at the bite site and the length of hospital stay. Kidney dysfunction occurred in 3 patients, 1 of whom died. The mean time to the largest swelling was 21.8 h while the mean time to the highest creatine phosphokinase level was 2.6 days. The more severe cases were more likely to be have been treated with mamushi antitoxin while 2 of the 3 patients with kidney dysfunction, including the 1 fatality, were not, suggesting that the use of mamushi antitoxin is essential in severe cases. We also report a very rare case of mamushi viper bite complicated by thrombocytopenia.

We use transumbilical laparoscopic-assisted appendectomy (TULAA) with a lifting retractor as the surgical technique of first choice for acute appendicitis. Although this technique provides excellent cosmetic results and contributes to reducing medical costs, it is less advantageous in difficult-to-complete cases that require conversion to pneumoperitoneum or additional ports. We retrospectively reviewed the records of 76 patients who underwent laparoscopic appendectomy between June 2020 and March 2023 (43 in a TULAA group and 33 in a pneumoperitoneal conversion group) to identify preoperative factors associated with pneumoperitoneal conversion. Univariate analysis showed significant differences for preoperative C-reactive protein (CRP) level, age, and body mass index. Logistic regression analysis identified preoperative CRP level and age as significant risk factors for pneumoperitoneal conversion. The pneumoperitoneal conversion rate was 12.5%, 48.2%, and 68% for patients with 0, 1, and 2 preoperative risk factors, respectively, indicating patients with 2 risk factors were more likely to undergo pneumoperitoneal conversion. These data may inform the selection of the surgical technique and the decision to convert to pneumoperitoneum.

Laparoscopy is useful for minimally invasive detailed examination of patients with suspected gastrointestinal perforation. Here we report a case of gastrointestinal perforation of unknown cause that was diagnosed laparoscopically as perforation of the sigmoid colon by a toothpick. The patient was a 41-year-old woman. She presented with a chief complaint of left lower abdominal pain and CT showed a small amount of free air in the peritoneal cavity, so emergency surgery was performed. Laparoscopy revealed a foreign body penetrating the sigmoid colon. After mobilization of the sigmoid colon, the surgical technique was switched to minilaparotomy and partial sigmoid colectomy was performed. The foreign body that had penetrated the intestine was identified as a toothpick. We later learned that the patient had become intoxicated while eating at a yakiniku barbecue restaurant 7 days prior to the operation, and she guessed that she had accidentally consumed a toothpick stuck in an onion. Gastrointestinal perforation by a toothpick is rare and is difficult to diagnose preoperatively because toothpicks appear transparent on X-ray imaging. In this case, laparoscopy was useful for identifying the site and cause of perforation as well as the extent of leakage into the peritoneal cavity.