BACKGROUND: Pressure rise time (PRT) is the time in which the ventilator aclieves the set airway pressure in pressure-targeted modes, such as pressure control ventilation (PCV). With varying PRT, in principle, the peak inspiratory flow rate of the ventilator also varies. And if PRT is set to a shorter duration, the effective duration of target pressure level would be prolonged. which in turn would increase inspiratory tidal volume(Vti) and mean airway pressure(Pmean). We also postulated that the increase in Vti with shortening of PRT may relate inversely to the patients' basal airway resistance. METHODS: In 13paralyzed patients on PCV(pressure control 18±9.5cm H2, FIO2 0.6±0.3, PEEP 5±3cm H2O, f20/min, I : E, 1 : 2) with Servo 300(Siemens-Elema, Solna, Sweden)from various causes of respiratory failure, PRT of 10%, 5% and 0% were randomly applied. At 30min of each PRT trial, peak inspiratory flow (PIF, L/sec), Vti(ml), Pmean(cm H2O) and ABGA were determined. RESULTS: At PRT 10, 5% and 0%, PIF were 01.69±0.13, 0.77±0.19, 0.83±0.22, respectively(p<0.001). Vti were 425±94, 439±101, 456±106, respectively(p<0.001), and Pmean were 11.2±3.7, 12.0±3.7, 12.5±3.8, respectively(p<0.001). pH were 7.40±0.08, 7.40 ±0.92, 7.41±0.96, respectively (p=0.004) ; PaCO2 (mm Hg) were 47.4±15.8, 47.2±15.7, 44.6±16.2, respectively (p=0.004) ; PAO2 - PaO2 (mm Hg) were 220±98, 224±95, 227±94, respectively(p=0.004) ; and Vd/Vt as determined by (PaCO2 - P CO2/PaCO2 were 0.67±0.07, 0.67±0.08, 0.66 ±0.08, respectively(p=0.007). The correlation between airway resistance and change of Vti from PRT 10% to 0% were r=-0.243(0.498). CONCLUSION: Shortening of pressure rise time during PCV was associated with associated with increased tidal volume, increased mean airway pressure and lower PaCO2.
Airway Resistance ; Humans ; Hydrogen-Ion Concentration ; Respiratory Insufficiency ; Tidal Volume* ; Ventilation* ; Ventilators, Mechanical

PURPOSE: As a baseline study for clinical application, we investigated MRI findings of normal cruciate ligaments in the knee being flexed as compared to those in the knee being extended. MATERIALS AND METHODS: Seven asymptomatic volunteers were studied. Knee MRI was performed with a 1.5 Tesla unit using a dual 3 inch coil. Inthe decubitus position, sagittal scanning was performed with the knee in extension, and subsequently, in flexion. We observed the shape and signal intensity of both cruciate ligaments, and measured the angles between the longaxis of the femur and ligaments, and the ligament dimensions in extension and flexion images. RESULTS: As flexionand extension images were compared, cruciate ligaments differed both in their appearance and dimensions. With flexion, joint space was widened, PCL became straightened and the signal intensity of ACL became homogeneously low; both cruciate ligaments became longer and thinner. These MRI findings were statistically significant except forthinning of PCL. CONCLUSION: MRI appearance and the dimensions of cruciate ligaments were different in the flexed knee as compared to those in the extended knee.
Femur ; Joints ; Knee* ; Ligaments* ; Magnetic Resonance Imaging* ; Volunteers

BACKGROUND: The level of imposed work of breathing (WOB) is important for patient-ventilator synchrony and during weaning from mechanical ventilation. Triggering methods and the sensitivity of demand system are important determining factors of the imposed WOB. Flow triggering method is available on several modem ventilator and is believed to impose less work to a patient-triggered breath than pressure triggering method. We intended to compare the level of imposed WOB on two different methods of triggering and also at different levels of sensitivities on each triggering method (0.7 L/min vs 2.0 L/min on flow triggering ; -1 cmH2O vs -2 cm H2O on pressure triggering). METHODS: The subjects were 12 patients (64.8α4.2 yrs) on mechanical ventilation and were stable in respiratory pattern on CPAP 3 cmH2O. Four different triggering sensitivities were applied at random order. For determination of imposed WOB, tracheal end pressure was measured through the monitoring lumen of Hi-Lo Jet tracheal tube (Mallincrodt, New York, USA) using pneumotachograph/pressure transducer (CP-100 pulmonary monitor, Bicore, Irvine, CA, USA). Other data of respiratory mechanics wert also obtained by CP-100 pulmonary monitor. RESULTS: The imposed WOB was decreased by 37.5% during 0.7 L/min on flow triggering compared to -2 cmH2O on pressure triggering and also decreased by 14% during -1 cmH2O compared to -2 cmH2O on pressure triggering (p<0.05 in each). The PTP(Pressure Time Product) was also decreased significantly during 0.7 L/min on flow triggering and -I cmH2O on pressure triggering compared to -2 cmH2O on pressure triggering(p<0.05 in each). The proportions of imposed WOB in total WOB were ranged from 37% to 85% and no significant changes among different methods and sensitivities. The physiologic WOB showed no significant changes among different triggering methods and sensitivities. CONCLUSION: To reduce the imposed WOB, flow triggering with sensitivity of 0.7 L/min would be better method than pressure triggering with sensitivity of -2 cm H2O.
Humans ; Modems ; Respiration, Artificial* ; Respiratory Mechanics ; Transducers ; Ventilation* ; Ventilators, Mechanical ; Weaning ; Work of Breathing*

No abstract availble.
Carcinoma, Renal Cell/*diagnosis/pathology/*secondary ; Female ; Gallbladder Neoplasms/*diagnosis/pathology/*secondary ; Humans ; Immunohistochemistry ; Kidney Neoplasms/*pathology ; Middle Aged ; Tomography, X-Ray Computed

BACKGROUND: irway inflammation is considered to be important to the pathophysiology of asthma. Recently, several studies suggested that the frequency of acute severe asthma and death caused by acute exacerbation was increasing and that neutrophils were predominant in some sputum from severe or fatal asthmatic patients. OBJECTIVE: To examine clinical and physiological factors that determine the different cellular profiles in airway inflammation, we analyzed the individual characteristics of patients with acute asthma. METHODS: We performed cellular analysis on spontaneous or induced sputum from 27 subjects with acute asthma exacerbation (PEFR<70%). They were divided into two groups: eosinophil dominant (eosinophil%>10%) (group 1) and neutrophil dominant (neutrophil 70%) (group 2). We compared the laboratory, clinical and physiological data. RESULTS: Twenty-two cases consisted of pure acute asthmatic patients without organic changes. Their sputum contained increased eosinophils, neutrophils, or both compared with the sputum from normal subjects. The cases of group 1 were more frequent (63.6%) than group 2 (36.4%) (p=0.001). The subjects included in group 1 were younger (mean 38.5 vs 58.6 years) (p<0.05) and had fewer smoking amounts (4.5 vs 10.8 pack years) (p=0.005) than group 2. The other factors were not different significantly. CONCLUSION: Old age and heavy smoking are important factors associated with neutrophil dominant airway inflammation in acute asthma. Further studies are needed to clarify the relationship between cellular composition, asthma severity and treatment response in asthma patients with neutrophil dominant sputum.
Asthma ; Eosinophils ; Humans ; Inflammation ; Neutrophils ; Smoke ; Smoking ; Sputum*

Acute colonic pseudo-obstruction (Ogilvie's syndrome) results in massive colonic dilation without mechanical obstruction. In most cases, a conservative treatment with or without endoscopic decompression is efficient. Rarely, surgery has to be performed. A surgical treatment is associated with high morbidity and mortality. However, a percutaneous endoscopic colostomy could be an interesting alternative treatment. We report the case of a 88-year-old female with colonic pseudo-obstruction for which both the conservative and the colonoscopic treatments were unsuccessful. A percutaneous endoscopic colostomy was performed, and symptomatic improvement was observed. We have shown that percutaneous endoscopic colostomy is a safe and effective treatment for acute colonic pseudo- obstruct
Aged, 80 and over ; Colon* ; Colonic Pseudo-Obstruction* ; Colostomy* ; Decompression ; Female ; Humans ; Mortality

Hydatid disease is a parasitic infestation caused by the larval form of the cestode worms Echinococcus. In humans, the most commonly affected organs are liver and lung. Most cysts remain clinically silent and are diagnosed incidentally or when complications occur. The incidence of hydatid disease is high in the Middle East, Australia, East and South Africa and Central Europe. In Korea, hydatid disease is rare and has been reported in a few cases. We experienced a case of multiple intraperitoneal cysts from ruptured hepatic hydatid cysts in a 35-year old man. His complaint was palpable abdominal mass and discomfort. Abdominal ultrasound and CT scan revealed multiple hepatic and intraperitoneal cysts. The surgical findings showed multiple cysts and daughter cysts. The pathologic finding of resected cyst was the characteristic pattern of outer thick laminated membrane and inner thin germinal layer. Albendazole was administrated for prophylatic purpose.
Adult ; Animals ; Cysts/parasitology/surgery ; Echinococcosis, Hepatic/*diagnosis/parasitology ; Echinococcus/isolation & purification ; Humans ; Liver/injuries/parasitology ; Male ; Peritoneal Cavity ; Rupture/diagnosis/surgery ; Tomography, X-Ray Computed

Mirizzi syndrome is commonly defined as a common hepatic duct obstruction caused by extrinsic compression from an impacted stone in the cystic duct. Mirizzi syndrome has traditionally been treated surgically. However, there are several case reports and small series describing endoscopic and percutaneous alternatives to open surgery. We encountered two cases of type I Mirizzi syndrome that was successfully treated endoscopically. We report these cases with a review of the relevant literature.
Cystic Duct ; Hepatic Duct, Common ; Mirizzi Syndrome*

Background: Lichenoid drug eruption (LDE) is a relatively rare form of cutaneous drug eruption and that resembles lichen planus on a clinical and histological basis. Although there are some studies on histopathological findings of LDE, studies on clinical findings of LDE are limited. Objective: To investigate the clinical and histopathologic findings and prognosis of LDE. Methods: We retrospectively investigated the clinicopathologic findings of LDE patients who visited Kosin University Gospel Hospital between 1990 and 2020. Results: This study included 44 LDE patients (male:female=1.4:1). The most common causative drug was anti-tuberculous drugs (52.3%), followed by 5-fluorouracil (11.4%), and captopril (9.1%). There were pruritic erythematous scaly or lichenoid patches and plaques in all cases. The most frequently involved sites were trunk and extremities. Notably, 15 cases (34.1%) involving the scalp and 3 cases (6.8%) involving the oral mucosa. Treatment modalities included oral, topical corticosteroid, and oral antihistamines. Among 44 cases, 28 patients discontinued the causative agent, and 16 patients continued to use it after diagnosis of LDE. The mean duration of treatment for patients who discontinued or did not discontinue the causative drugs was 4, 10 weeks, respectively. The most commonly observed histopathologic findings were superficial and deep perivascular infiltration of inflammatory cells (100.0%) and eosinophil infiltration (93.2%). Conclusion LDE can be differentiated from idiopathic lichen planus by clinicopathologic findings. LDE appears to be a mild form of drug eruption in which symptoms can be controlled with conservative treatment, even without the cessation of causative drugs for the treatment of the underlying disease.