No Abstract Available.
Fas Ligand Protein* ; Keratoconus*

No abstract available.
Genes, ras* ; Humans*

PURPOSE: Radionuclide cisternography may be helpful in understanding pathophysiology of postural headache and low CSF pressure in patients with spontaneous intracranial hypotension. The purpose of this study was to characterize radionuclide cisternographic findings of spontaneous intracranial hypotension. MATERIALS AND METHODS: The study population consists of 15 patients with spontaneous intracranial hypotension. Diagnosis was based on their clinical symptoms and results of lumbar puncture. All patients underwent radionuclide cisternography following injection of 111 to 222 MBq of Tc-99m DTPA into the lumbar subarachnoid space. Sequential images were obtained between 1/2 hour and 24 hour after the injection of Tc-99m DTPA. Radioactivity of the bladder, soft tissue uptake, migration of radionuclide in the subarachnoid space, and extradural leakage of radionuclide were evaluated according to the scan time. RESULTS: Radionuclide cisternogram showed delayed migration of radionuclide into the cerebral convexity (14/15), increased soft tissue uptake (11/15), and early visualization of bladder activity at 30 min (6/10) and 2 hr (13/13). Cisternography also demonstrated leakage site of CSF in 4 cases and 2 of these were depicted at 30 min. Epidural blood patch was done in 11 patients and headache was improved in all cases. CONCLUSION: The characterstic findings of spontaneous intracranial hypotension were delayed migration of radionuclide and early visualization of the soft tissue and bladder activity. These scintigraphic findings suggest that CSF leakage rather than increased CSF absorption or decreased production may be the main pathophysiology of spontaneous intracranial hypotension. Early and multiple imaging including the bladder and soft tissue is required to observe the entire dynamics of radionuclide migration.
Absorption ; Blood Patch, Epidural ; Diagnosis ; Headache ; Humans ; Intracranial Hypotension* ; Pentetic Acid ; Radioactivity ; Spinal Puncture ; Subarachnoid Space ; Urinary Bladder

No abstract available.
Nephrotic Syndrome*

Direct intraarterial measurement of blood pressure is an important diagnostic procedure in critical patients and premature baby care. Direct measurement was more accepted and confident method in physician than the indirect methods. But the presence of a significant amplification of systolic pressure in peripheral artery may lead to important error. So we have investigated the degree of the systolic pressure amplification from the ascending aorta to the femoral artery in children. Pressure waves recorded in the ascending aorta, aortic arch, diaphragmatic level of the descending aorta, common iliac artery, and femoral artery in 37 patients with congenital heart disease, aged 9 months to 21 years old (mean 7.16 yrs old) during diagnostic cardiac catheterization. The results were as follows 1) Amplification of the systolic pressure increased progressively from the ascending aorta to the femoral artery (16.7%) 2) Diastolic pressure decreased progressively from the ascending aorta to the femoral artery (6.5%) 3) Mean pressure decreased progressively from the ascending aorta to the femoral artery (1.5%) 4) Pulse pressure increased progressively from the ascending aorta to the femoral artery (42.8%) 5) There was significant drop (7%) of the systolic pressure of the ascending aorta compared with that of left ventricle. The results showed that the peripheral amplifications were limited to the systolic and pulse pressure, but the diastolic and mean pressure in peripheral arteries were lower than that of central artery.
Aorta ; Aorta, Thoracic ; Arterial Pressure* ; Arteries ; Blood Pressure* ; Cardiac Catheterization ; Cardiac Catheters ; Child* ; Femoral Artery ; Heart Defects, Congenital* ; Heart Ventricles ; Humans ; Iliac Artery ; Young Adult

No abstract available.
Heart Defects, Congenital* ; Plasma*

Due to an increasing interest in esthetics and concerns about toxic and allergic reactions to certain alloys, patients and dentists have been looking for metal-free tooth-colored restorations. Recent improvement in technology of new all-ceramic materials and composite materials has broadened the options for esthetic single crown restorations. The aim of this investigation was to study the fracture strength of the metal-free posterior single crowns fabricated using two recently introduced systems, Empress 2 ceramic and Targis-Vectris. Forty premolar-shaped stainless steel dies with the 1mm-wide circumferential shoulder were prepared. Ten cylindrical crowns having a diameter of 8.0mm and total height of 7.5mm were fabricated for each crown system respectively (PFM, Empress staining technique, Empress 2 layering technique, and Targis-Vectris). The crowns were filled with cement and placed on the stainless steel dies with firm finger pressure. The crowns were then stored in distilled water at room temperature for 24 hours before testing. The crowns were tested for fracture strength in an Instron universal testing machine (Instron 6022). With a crosshead speed of 1mm/min the center of the occlusal surface of the crown was loaded using a 4mm-diameter stainless steel ball until fracture occurred. The fracture surfaces of the crowns were gold coated and examined using scanning electron microscopy (Jeol JSM-840 Joel Ltd., Akishima, Tokyo, Japan). Within the parameters of this study the following conclusions were drawn: 1. The mean fracture strength for PFM crowns was 5829(+/-906)N; for Empress staining technique the fracture strength was 1697(+/-604)N; for Empress 2 Layering technique the fracture strength was 1781N(+/-400)N, and the fracture strength for Targis-Vectris was 3093(+/-475)N. 2. The fracture strength of the PFM crowns was significantly higher than that of the Empress 2 and the Targis-Vectris crowns (P<0.05). 3. The fracture strength of the Targis-Vectris crowns was significantly higher than that of the Empress 2 crowns (P<0.05). 4. No statistical difference was found when Empress staining technique was compared with Empress 2 layering technique. 5. The SEM image of fracture surface of Empress 2 crown showed a very dense microstructure of the lithium disilicate crystals and the SEM image of fracture surface of Targis-Vectris crown showed indentations of Vectris and some fibers torn off from Vectris.
Alloys ; Ceramics* ; Crowns* ; Dentists ; Esthetics ; Fingers ; Humans ; Hypersensitivity ; Lithium ; Microscopy, Electron, Scanning ; Shoulder ; Stainless Steel ; Water

No abstract available.
Humans ; Pepsinogen A*

The congenital cystic adenomatoid malformation (CCMA) of the lung is a rare variant of congenital cystic lung disease consisted of one or usually multiple interconnecting cysts in the pulmonary parenchyma lined by cuboidal and columnar epithelium. This diease present clinically in three ways: 1) stillborn or perinatal death, 2)progress respiratory distress in the newborn, and 3)acute and chronic pulmonary infections in the older infant and child. The onset of symptoms, which are cyanosis, tachypnea, and other forms of respiratory distress, usually occurs at or shortly after birth, This manifestations are related to compression of the remained normal ung by expansion of the cysts. We have experienced a case of congenital cystic adenomatoid malformation of the lung in a 1-day-old male infant who had tachypnea. A right upper lobectomy was done with satisfactory postoperative courses clinically and radiologically at 8 months of age. A brief review of the related literature is presented.
Child ; Cyanosis ; Cystic Adenomatoid Malformation of Lung, Congenital* ; Epithelium ; Humans ; Infant ; Infant, Newborn ; Lung Diseases ; Lung* ; Male ; Parturition ; Tachypnea

No abstract available.
Child* ; Humans ; Hypercalciuria*