A simple, inexpensive technique for accurate mass localization by computerized tomography

1980 ◽  
Vol 52 (5) ◽  
pp. 733-735 ◽  
Author(s):  
John I. Moseley ◽  
Steven L. Giannotta ◽  
Justin W. Renaudin
Keyword(s):  
Computerized Tomography ◽  
Accurate Mass ◽  
Content Type ◽  
Accurate Localization ◽  
Relationship Of ◽  
The Relationship ◽  
Inexpensive Technique ◽  
Tomography Scanning ◽  
Fine Print

✓ A simple wire template is placed on the patient's head during computerized tomography scanning, and the results of the scan are later reproduced on the scalp prior to surgery. Measurements of the distance between the wires and the relationship of the mass provide the key to accurate localization of the mass on the scalp surface.

Relationship of perfusion pressure and size to risk of hemorrhage from arteriovenous malformations

1992 ◽  
Vol 76 (6) ◽  
pp. 918-923 ◽  
Author(s):  
Robert F. Spetzler ◽  
Ronald W. Hargraves ◽  
Patrick W. McCormick ◽  
Joseph M. Zabramski ◽  
Richard A. Flom ◽  
...  
Keyword(s):  
Perfusion Pressure ◽  
Feeding Artery ◽  
Content Type ◽  
Arterial Blood ◽  
The Mean ◽  
Feeding Pressure ◽  
Risk Of Hemorrhage ◽  
Relationship Of ◽  
The Relationship ◽  
Fine Print

✓ The relationship between the size of an arteriovenous malformation (AVM) and its propensity to hemorrhage is unclear. Although nidus volume increases geometrically with respect to AVM diameter, hemorrhages are at least as common, in small AVM's compared to large AVM's. The authors prospectively evaluated 92 AVM's for nidus size, hematoma size, and arterial feeding pressure to determine if these variables influence the tendency to hemorrhage. Small AVM's (diameter ≤ 3 cm) presented with hemorrhage significantly more often (p < 0.001) than large AVM's (diameter > 6 cm), the incidence being 82% versus 21%. Intraoperative arterial pressures were recorded from the main feeding vessel(s) in 24 of the 92 patients in this series: 10 presented with hemorrhage and 14 presented with other neurological symptoms. In the AVM's that had hemorrhaged, the mean difference between mean arterial blood pressure and the feeding artery pressure was 6.5 mm Hg (range 2 to 15 mm Hg). In the AVM's that did not rupture, this difference was 40 mm Hg (range 17 to 63 mm Hg). Smaller AVM's had significantly higher feeding artery pressures (p < 0.05) than did larger AVM's, and they were associated with large hemorrhages. It is suggested that differences in arterial feeding pressure may be responsible for the observed relationship between the size of AVM's and the frequency and severity of hemorrhage.

Fatal subarachnoid hemorrhage after endoscopic third ventriculostomy

1999 ◽  
Vol 90 (1) ◽  
pp. 153-155 ◽  
Author(s):  
Henry W. S. Schroeder ◽  
Rolf W. Warzok ◽  
Jamal A. Assaf ◽  
Michael R. Gaab
Keyword(s):  
Subarachnoid Hemorrhage ◽  
Computerized Tomography ◽  
Endoscopic Third Ventriculostomy ◽  
Obstructive Hydrocephalus ◽  
Balloon Catheter ◽  
Third Ventriculostomy ◽  
Safe Procedure ◽  
Content Type ◽  
Tomography Scanning ◽  
Fine Print

✓ In recent years, endoscopic third ventriculostomy has become a well-established procedure for the treatment of various forms of noncommunicating hydrocephalus. Endoscopic third ventriculostomy is considered to be an easy and safe procedure. Complications have rarely been reported in the literature. The authors present a case in which the patient suffered a fatal subarachnoid hemorrhage (SAH) after endoscopic third ventriculostomy.This 63-year-old man presented with confusion and drowsiness and was admitted in to the hospital in poor general condition. Computerized tomography scanning revealed an obstructive hydrocephalus caused by a tumor located in the cerebellopontine angle. An endoscopic third ventriculostomy was performed with the aid of a Fogarty balloon catheter. Some hours postoperatively, the patient became comatose. Computerized tomography scanning revealed a severe perimesencephalic—peripontine SAH and progressive hydrocephalus. Despite emergency external ventricular drainage, the patient died a few hours later.Although endoscopic third ventriculostomy is considered to be a simple and safe procedure, one should be aware that severe and sometimes fatal complications may occur. To avoid vascular injury, perforation of the floor of the third ventricle should be performed in the midline, halfway between the infundibular recess and the mammillary bodies, just behind the dorsum sellae.

Laboratory experience with a magnetically guided intravascular catheter system

1973 ◽  
Vol 38 (2) ◽  
pp. 145-154 ◽  
Author(s):  
Herbert L. Cares ◽  
J. Richard Hale ◽  
D. Bruce Montgomery ◽  
Howard A. Richter ◽  
William H. Sweet
Keyword(s):  
Intravascular Catheter ◽  
Selective Angiography ◽  
Content Type ◽  
Laboratory Experience ◽  
Arteriovenous Fistulas ◽  
Catheter System ◽  
Relationship Of ◽  
The Relationship ◽  
Fine Print

✓ An improved magnetically-guided intravascular catheter system in dogs is described as safe, requiring little attention, allowing the application of flow surges to aid propulsion of the tip, and providing for angiography of good quality. Current concepts of the relationship of magnetic and flow guidance are discussed. The uses of the system demonstrated include selective angiography, perfusion of isobutyl-2-cyanoacrylate into experimental arteriovenous fistulas, and perfusion of microparticulate iron suspensions into experimental aneurysms. A unique detachable macroballoon that may function as a reversible tethered embolus is reported.

Dermoid tumors occurring at the site of previous myelomeningocele repair

1986 ◽  
Vol 65 (6) ◽  
pp. 779-783 ◽  
Author(s):  
R. Michael Scott ◽  
Samuel M. Wolpert ◽  
Louis E. Bartoshesky ◽  
Seymour Zimbler ◽  
George T. Klauber
Keyword(s):  
Differential Diagnosis ◽  
Lower Extremity ◽  
Computerized Tomography ◽  
Neurological Deterioration ◽  
Bladder Function ◽  
Content Type ◽  
Surgical Exploration ◽  
Myelomeningocele Repair ◽  
Tomography Scanning ◽  
Fine Print

✓ Four children with previously repaired myelomeningoceles presented toward the end of the first decade or early in the second decade of life with deteriorating lower-extremity and bladder function. Myelography and computerized tomography scanning demonstrated irregular filling defects at the area of the myelomeningocele repair, and surgical exploration disclosed dermoid tumors that were adherent to the placode and adjacent roots. Dermoid tumors should be considered in the differential diagnosis of neurological deterioration in children with a repaired myelomeningocele.

Computerized tomography of cranial sutures

1984 ◽  
Vol 61 (1) ◽  
pp. 53-58 ◽  
Author(s):  
Yoshimi Furuya ◽  
Michael S. B. Edwards ◽  
Charles E. Alpers ◽  
Brian M. Tress ◽  
Douglas K. Ousterhout ◽  
...  
Keyword(s):  
High Resolution ◽  
Computerized Tomography ◽  
Developmental Changes ◽  
Cranial Sutures ◽  
Skull Fractures ◽  
Anatomical Structures ◽  
Content Type ◽  
Print Knowledge ◽  
Tomography Scanning ◽  
Fine Print

✓ Knowledge of normal suture anatomy and development is vital in order to understand abnormal suture development and to be able to distinguish sutures radiographically from normal anatomical structures and possible skull fractures. The anatomy of the sutures and synchrondroses of 150 normal pediatric and adult patients was studied using high-resolution computerized tomography scanning. Sutures of both the calvaria and skull base were most accurately identified in axial and coronal high-resolution thin-section scans when bone window algorithms were used. Developmental changes of the sutures and synchodroses, the inner and outer tables, and the diploic space were all well delineated. Vault sutures could be identified routinely in children, but their presence in adults varied considerably. With increasing age, parasutural sclerosis developed and sutures were more closely apposed.

Immunobiology of primary intracranial tumors

1977 ◽  
Vol 47 (6) ◽  
pp. 871-885 ◽  
Author(s):  
Ronald E. Woosley ◽  
M. Stephen Mahaley ◽  
Jane L. Mahaley ◽  
Gary M. Miller ◽  
William H. Brooks
Keyword(s):  
Effector Cell ◽  
Intracranial Tumors ◽  
Content Type ◽  
Postoperative Course ◽  
Immune Parameters ◽  
Relationship Of ◽  
The Relationship ◽  
Cytotoxic Responses ◽  
Fine Print

✓ Fifty-six in vitro microcytotoxicity assays were conducted on 30 patients with intracranial tumors at various times during their postoperative course. Significant specific cellular cytotoxic responses were found in nine of 56 assays, humoral cytotoxic responses in nine of 54 assays, and host effector cell-dependent, antibody-dependent cytotoxic responses in four of 28 assays. Variables that might influence the occurrence of cytotoxicity were studied, and the relationship of these findings to other immune parameters was discussed.

Optic canal syndrome due to posterior ethmoid sinus mucocele

1986 ◽  
Vol 65 (6) ◽  
pp. 871-873 ◽  
Author(s):  
Chung P. Yue ◽  
Kirpal S. Mann ◽  
Fu L. Chan
Keyword(s):  
Optic Nerve ◽  
Computerized Tomography ◽  
Ethmoid Sinus ◽  
Optic Canal ◽  
Content Type ◽  
Anatomical Relationship ◽  
Relationship Of ◽  
Canal Syndrome ◽  
Fine Print

✓ A case of mucocele of the posterior ethmoid sinus presenting as unilateral blindness without pain, proptosis, or diplopia is reported. Computerized tomography (CT) demonstrated the precise anatomical relationship of the mucocele to the optic nerve inside the optic canal. It is proposed to use the term “optic canal syndrome” for patients with such clinical and CT presentation. Combined transcranial excision and transnasal drainage resulted in dramatic recovery of vision.

No ordinary time, no ordinary men: the relationship between Harvey Cushing and Franklin D. Roosevelt, 1928–1939

2001 ◽  
Vol 95 (2) ◽  
pp. 354-368 ◽  
Author(s):  
Richard L. Rovit ◽  
William T. Couldwell
Keyword(s):  
Personal Relationship ◽  
Content Type ◽  
Harvey Cushing ◽  
Medical Issues ◽  
Ordinary Time ◽  
The Times ◽  
Franklin Delano Roosevelt ◽  
Relationship Of ◽  
The Relationship ◽  
Fine Print

✓ The authors elucidate the strong personal relationship that developed between Dr. Harvey Cushing and Franklin Delano Roosevelt (FDR) from 1928 to 1939, as manifested in their frequent letters to each other. The relationship was initiated by the marriage of their children. Through his correspondence with FDR, Cushing was able to affect several medical issues of the period. The relationship of these two individuals is set within the historical, social, and political contexts of the times.

Relation of preoperative angiographic characteristics of the posterior communicating artery to the results of common carotid ligation

1972 ◽  
Vol 36 (5) ◽  
pp. 564-568 ◽  
Author(s):  
Kenneth Tuerk ◽  
Norman E. Chase ◽  
Irvin I. Kricheff ◽  
Joseph P. Lin ◽  
Joseph Ransohoff
Keyword(s):  
Contrast Material ◽  
Posterior Communicating Artery ◽  
Carotid Angiography ◽  
Content Type ◽  
Carotid Ligation ◽  
Before And After ◽  
Relationship Of ◽  
The Relationship ◽  
Fine Print

✓ Twenty patients with posterior communicating artery aneurysms were treated with common carotid ligation. Postligation visualization was accomplished in 16 cases by ipsilateral brachial angiography. Two other aneurysms were visualized by contralateral brachial and contralaterial carotid angiography. The size of the aneurysm was measured before and after ligation. The relationship of postoperative reduction in size to preoperative angiographic characteristics was studied. Reduction in the size of the aneurysm occurred most often when preoperative angiography showed that the sac was long and its neck narrow, and when there was stasis of contrast material in the aneurysm.

Thrombosis: the relationship of hemostatic mechanisms to drug therapy

1981 ◽  
Vol 54 (1) ◽  
pp. 1-11 ◽  
Author(s):  
Stanford Wessler ◽  
Sanford N. Gitel
Keyword(s):  
Drug Therapy ◽  
Content Type ◽  
Relationship Of ◽  
The Relationship ◽  
Fine Print

✓ The mechanisms of arteriovenous and microcirculatory thrombosis and embolism are presented. Drugs affecting the hemostatic balance and their specific actions and indications are reviewed.

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