1.Two cases of chorioangioma.
Hey Kyung OH ; Jun Ryul CHOI ; Tae Dong PARK ; Hum Rye PARK ; Young Suk LEE
Korean Journal of Obstetrics and Gynecology 1991;34(9):1322-1329
No abstract available.
Hemangioma*
4.Evaluation of the Biodurability of Polyurethane-Covered Stent Using a Flow Phantom.
Dong Hyun KIM ; Sung Gwon KANG ; Jung Ryul CHOI ; Ju Nam BYUN ; Young Chul KIM ; Young Moo AHN
Korean Journal of Radiology 2001;2(2):75-79
OBJECTIVE:To evaluate the biodurability of the covering material in retrievable metallic stents covered with polycarbonate polyurethane. MATERIALS AND METHODS: Using a peristaltic pump at a constant rate of 1ml/min, bile was recirculated from a reservoir through a long tube containing four stents. Each of these was removed from the system every two weeks and a radial tensile strength test and scanning electron microscopy (SEM) were performed. Each stent, removed at 2, 4, 6 and 8 weeks, was compared with a control stent not exposed to bile juice. RESULTS: Gross examination showed that stents were intact at 2 weeks, but at 4, 6 and 8 weeks cracks were observed. The size of these increased gradually in accordance with the duration of exposure, and at 8 weeks several large holes in the polyurethane membrane were evident. With regard to radial tensile strength, extension and peak load at break were 84.47% and 10.030 N/mm, 54.90% and 6.769 N/mm, 16.55% and 2.452 N/mm, 11.21% and 1.373 N/mm at 0, 2, 4 and 6 weeks, respectively. Scanning electron microscopy at 2 weeks revealed intermittent pitting and cracking, and examination at 4, 6 and 8 weeks showed that the size of these defects was gradually increasing. CONCLUSION: When the polyurethane membrane was exposed to bile, biodegradation was first observed at week two and increased gradually according to the duration of exposure.
Bile Acids and Salts/physiology
;
Biodegradation
;
Hydrogen-Ion Concentration
;
Microscopy, Electron, Scanning/*instrumentation
;
Phantoms, Imaging
;
*Polyurethanes
;
*Stents
;
Support, Non-U.S. Gov't
;
Tensile Strength
;
Time Factors
5.A Case of Pyogenic Ventriculitis Complicating Obstruction of Aqueduct of Sylvius.
Dong Ryul CHOI ; Duck Si BYUN ; In Soo LEE
Journal of Korean Neurosurgical Society 1974;3(1):85-90
A rare case of ventriculitis associated with the obstruction of aqueduct of Sylvius is reported and the pertinent literature reviewed. A 24 years old male, who had been suffering from a longstanding chronic pyogenic ear disease since childhood, was admitted to our clinic in Dec. 1973 with a comatose state. Contrast radiology showed the obstructive hydrocephalus with the occluded aqueduct of Sylvius, but neither intracerebral or intracerebellar space consuming mass presented. Cerebrospinal and ventricular fluid revealed a marked growth of Escherichia Coli. So ventriculitis complicating obstruction of the aqueduct of Sylvius due to chronic suppurative otitis media and mastoiditis was diagnosed in this patient, and treated by Torkildsen's operation with proper chemotherapy and resulted in good recovery. We experienced that ventriculitis initiated from meningitis might give rise to obstruction of the aqueduct of Sylvius and it could be considered as a brain abscess superimposed raised intracranial pressure from obstructive hydrocephalus.
Brain Abscess
;
Cerebral Aqueduct*
;
Coma
;
Drug Therapy
;
Ear Diseases
;
Escherichia coli
;
Humans
;
Hydrocephalus
;
Intracranial Pressure
;
Male
;
Mastoid
;
Mastoiditis
;
Meningitis
;
Otitis Media, Suppurative
;
Young Adult
6.A Case of Pyogenic Ventriculitis Complicating Obstruction of Aqueduct of Sylvius.
Dong Ryul CHOI ; Duck Si BYUN ; In Soo LEE
Journal of Korean Neurosurgical Society 1974;3(1):85-90
A rare case of ventriculitis associated with the obstruction of aqueduct of Sylvius is reported and the pertinent literature reviewed. A 24 years old male, who had been suffering from a longstanding chronic pyogenic ear disease since childhood, was admitted to our clinic in Dec. 1973 with a comatose state. Contrast radiology showed the obstructive hydrocephalus with the occluded aqueduct of Sylvius, but neither intracerebral or intracerebellar space consuming mass presented. Cerebrospinal and ventricular fluid revealed a marked growth of Escherichia Coli. So ventriculitis complicating obstruction of the aqueduct of Sylvius due to chronic suppurative otitis media and mastoiditis was diagnosed in this patient, and treated by Torkildsen's operation with proper chemotherapy and resulted in good recovery. We experienced that ventriculitis initiated from meningitis might give rise to obstruction of the aqueduct of Sylvius and it could be considered as a brain abscess superimposed raised intracranial pressure from obstructive hydrocephalus.
Brain Abscess
;
Cerebral Aqueduct*
;
Coma
;
Drug Therapy
;
Ear Diseases
;
Escherichia coli
;
Humans
;
Hydrocephalus
;
Intracranial Pressure
;
Male
;
Mastoid
;
Mastoiditis
;
Meningitis
;
Otitis Media, Suppurative
;
Young Adult
7.A case of Incontinentia Pigmenti.
Hyun Mo KOO ; Chun Dong KIM ; Byung Ryul CHOI ; Han Gu MOON ; Yong PARK ; Jin Gon JUN ; Jeong Ok HAH
Journal of the Korean Pediatric Society 1985;28(4):396-399
No abstract available.
Incontinentia Pigmenti*
8.A Case of Oligodendroglioma.
Duck Si BYUN ; Dong Ryul CHOI ; Bong Arm RHEE ; In Soo LEE ; Moon Ho YANG
Journal of Korean Neurosurgical Society 1974;3(2):189-194
We have seen a case of oligodendroglioma arising in the left frontal lobe of 64-year-old woman. She had complained of longstanding headache with occasional seizures and episodic dysarthrias for six years before admission. On admission there were drowsy mentality and bilateral papilledema of 3 diopters without other neurological abnormality. The tumor was showed as a calcified mass of an egg size in the left frontal lobe even on the plain skull X-ray films. The tumor was totally removed by surgery and measured 4(5(4cm. On microscopic examination it was a typical oligodendroglioma. The patient was discharged in good condition on the twelfth postoperative day. Many authors reported that the incidence of oligodendrogliomas in all glioma group was relatively rare. In Korea there was no clinical report of oligodendroglioma except only two cases reported by Dr. Lee et al. in 1966. So we present this case, though it was typical and classical in pathological nature and clinical process.
Dysarthria
;
Female
;
Frontal Lobe
;
Glioma
;
Headache
;
Humans
;
Incidence
;
Korea
;
Middle Aged
;
Oligodendroglioma*
;
Ovum
;
Papilledema
;
Seizures
;
Skull
;
X-Ray Film
9.A Clinical Observation on Posterior Fossa Injury.
Dong Ryul CHOI ; Suk Be MOON ; Duck Si BYUN ; Bong Arm RHEE ; In Soo LEE
Journal of Korean Neurosurgical Society 1974;3(2):143-150
Posterior fossa injury is a relatively infrequent in all craniocerebral injuries, which may be a rapidly fatal disease unless the diagnosis and prompt treatment are made. Delay in operation or failure to make the diagnosis early may result in death from medullary decompensation. An injury to the occipital region, followed by signs and symptoms of cerebellar or medullary nerve dysfunction, should cause one to suspect the existence of this lesion. It is well to remember that neither the surgically demonstrated presence of a supratentorial clot nor the roentgenological failure to demonstrate an occipital fracure excludes the presence of a mass lesion in the posterior fossa. Authors studied 104 cases of posterior fossa injury admitted at Department of Neurosurgery, Kyung Hee Medical Center from October 5 th, 1971 to August 30 th, 1974. The results were as follows: 1) The incidence of posterior fossa injury was 5.7% of all craniocerebral injuries. 2) The age incidence was greatest in the age group between 10 and 20. 27.9% of all cases were belonged in this group. 3) Common causes were traffic accident(82 cases:78.8%), falls from(14 cases:13.5%) and direct blow(6 cases:5.8%). 4) Male outnumbered female by almost 2 to 1. 5) Common symptoms were disturbance of consciousness(67 cases:64.4%), headache(43 cases:41.3%) and vomiting(24 cases:21.3%). 6) Scalp injuries were demonstrated in 95 cases and occipital, bone fracture in 58 cases under gross and radiological examination of posterior fossa. 7) Time interval between injury and operation was greatest at 3 to 6 hours. 8) In 30 cases of operation, massive cerebellar contusion was 13 cases, extradural hematoma was 7 cases and subdural hematoma was 2 cases and negative exploration was 6 cases. 9) The overall mortality rate was 25%.
Contusions
;
Craniocerebral Trauma
;
Diagnosis
;
Female
;
Fractures, Bone
;
Hematoma
;
Hematoma, Subdural
;
Humans
;
Incidence
;
Male
;
Mortality
;
Neurosurgery
;
Scalp
10.5 Cases of Major Complications after Rhinologic Surgery: Avoidable and Unavoidable Cases.
Hong Ryul JIN ; Hyun Seok LEE ; See Ok SHIN ; Young Seok CHOI ; Dong Wook LEE
Journal of Rhinology 2004;11(1, 2):75-82
Otolaryngologists are sometimes confronted with various complications. They may be minor or sometimes they can be major, and rarely fatal. Some complications can be prevented, but some are unavoidable. Five cases of major complications, which occurred during or after routine rhinologic surgery, are presented. Two patients died of toxic shock syndrome: one patient after endoscopic sinus surgery (ESS) and the other patient after closed nasal bone reduction. One patient died of acute myocardial infarction during the recovery of anesthesia after uneventful ESS. One patient had a lidocaine shock, which required treatment in the intensive care unit. One patient had a transient unilateral blindness after intranasal steroid injection. Though the 3rd and 4th cases of complications were unavoidable, the others could have been prevented if precautions had taken place. The presumed pathophysiology, possible prevention measures, and their implications in routine otolaryngologic surgery are discussed.
Anesthesia
;
Blindness
;
Humans
;
Intensive Care Units
;
Lidocaine
;
Myocardial Infarction
;
Nasal Bone
;
Shock
;
Shock, Septic