1/77. Upper urinary tract obstruction: pressure/flow studies in children.34 upper urinary tract pressure/flow studies were carried out in 24 children. Obstruction was reliably diagnosed in 8 studies, and excluded in 21. This technique may provide information of clinical value in the patient with upper urinary tract dilatation.- - - - - - - - - - ranking = 1keywords = pressure (Clic here for more details about this article) |
2/77. frontal sinus pneumocele. A case report.A pneumocele refers to an aerated sinus with either focal or generalized thinning of the bony sinus wall. Although the pathogenesis of a pneumocele is not yet known, it is presumed that increased intrasinusal pressure, due to a one-way valve between the nasal cavity and the affected sinus, is responsible for this condition. A 37-year-old man with frontal bossing, who underwent surgery for cosmetic reasons, is presented.- - - - - - - - - - ranking = 0.2keywords = pressure (Clic here for more details about this article) |
3/77. Distensible venous malformations of the orbit: clinical and hemodynamic features and a new technique of management.OBJECTIVE: To investigate distensible venous malformations of the orbit (DVMO) as part of a spectrum of orbital vascular malformations, including some that involved periorbital skin, extraorbital sites (central nervous system or nasal sinuses), or combinations of these. The authors also investigated the effectiveness of a new technique of management for selected cases. DESIGN: Retrospective noncomparative case series. PARTICIPANTS: Thirty patients had distensible venous anomalies, of which four were combined distensible venous-lymphatic vascular malformations. Distensible lesions were defined as those showing clinical or radiographic expansion with valsalva maneuver or when the head was placed in a dependent position. These lesions were then classified as superficial (anterior to the equator of the globe), deep (posterior to the globe's equator), combined (deep and superficial), or complex (with intracranial or major extraorbital involvement). INTERVENTION: Surgery was performed on 15 patients (50%), mainly for pain or for cosmetic indications. Six patients underwent this new technique, which involved intraoperative direct venography with control of outflow via pressure at the superior or inferior orbital fissure. The venous malformation was then embolized (by use of cyanoacrylate glue) and excised. RESULTS: The mean age at presentation was 28.2 years (range, 8 months to 75 years). Sixty-six percent of cases involved the left orbit. Superior and medial orbital involvement was most common. Three cases (10%) were classified as superficial, and 13 (43%) as deep. Six patients (20%) had combined superficial and deep components. Eight (27%) had major extraorbital involvement (4 intracranial, 2 facial, and 2 paranasal sinus). Direct venography demonstrated complex multichannel anomalies draining to various sites, including the face and pterygopalatine fossa, without necessarily having a direct connection to the major orbital venous circulation. CONCLUSIONS: Distensible venous malformations of the orbit are part of a spectrum of developmental venous malformations that may be localized to the orbit or involve it as part of a more extensive lesion. The authors describe their clinical and radiologic features and report a new technique of management for selected cases. This method of vascular isolation and embolization of lesions may greatly facilitate excision.- - - - - - - - - - ranking = 0.2keywords = pressure (Clic here for more details about this article) |
4/77. aortic valve stenosis with left ventricular outflow tract pressure gradient.A 61-year-old man was diagnosed with severe aortic valve stenosis with left ventricular outflow tract pressure gradient due to systolic anterior movement of the mitral valve and a large poststenotic dilation of the ascending aorta. He underwent successful aortic root replacement and concomitant septal myectomy.- - - - - - - - - - ranking = 1keywords = pressure (Clic here for more details about this article) |
5/77. Isolated tricuspid valve regurgitation resulting from severe annular dilatation: case report.A rare case of isolated tricuspid regurgitation (TR) in a 65-year-old man is presented. echocardiography revealed enlargement of the right atrium, dilatation of the tricuspid valve annulus without thickening or prolapse of the leaflets, and an intact atrial septum. No downward displacement of the tricuspid septal leaflet was observed by echocardiography. Mild mitral regurgitation and severe TR were detected on color flow Doppler studies. cardiac catheterization indicated elevated right atrial pressure, with a pronounced V-wave. No left-to-right shunt was detected at the right atrium. At surgery, severe annular dilatation of the tricuspid valve (without organically diseased or deformed tricuspid leaflets) was observed, and tricuspid annuloplasty with a prosthetic ring performed. Postoperative echocardiography and right ventriculography showed trivial TR.- - - - - - - - - - ranking = 0.2keywords = pressure (Clic here for more details about this article) |
6/77. New-onset headache in an adolescent with MASS syndrome.A 15-year-old girl with the "MASS" phenotype (meeting several of the minor criteria for marfan syndrome) presents with a new onset low-pressure postural headache. Clinical features and magnetic resonance imaging suggested intracranial hypotension, which was confirmed with lumbar puncture. The pathophysiology and treatment of spontaneous intracranial hypotension are discussed.- - - - - - - - - - ranking = 0.2keywords = pressure (Clic here for more details about this article) |
7/77. Right ovarian vein syndrome. A case with pre- and peroperative electromyographic registration of ureteral activity.Electrophysiological studies of ureteral function in a patient with right ovarian vein syndrome demonstrated intermittent antiperistalsis as reflected from pre-operative endoureteral activity recordings. The antiperistalsis was related to the patient intermittent right flank pain. Per-operative EMG and pressure measurements revealed that the antiperistalsis apparently arose from the area of obstruction and caused pressure waves of higher amplitude than those seen during normal anterograde peristaltic activity. After section of the vein, exclusively anterograde peristalsis was observed, and at 3 month follow-up, the patient was free of right side colics.- - - - - - - - - - ranking = 0.4keywords = pressure (Clic here for more details about this article) |
8/77. Idiopathic annular dilation: a rare cause of isolated severe tricuspid regurgitation.The management of patients with severe tricuspid regurgitation (TR) requires the clinician to clarify the mechanism of regurgitation. Primary disorders of the tricuspid valve, either congenital or acquired, may be readily identified by echocardiography. Severe TR most often results from left-sided heart disease and secondary pulmonary hypertension. Cardiomyopathic processes may also cause right ventricular failure and functional TR. We report three patients with severe TR due to idiopathic annular dilation. The tricuspid valves were otherwise normal on surgical inspection, and the pulmonary pressures were not significantly elevated. Each patient was aged over 65 years and had chronic atrial fibrillation with preserved left ventricular systolic function. Surgical treatment was associated with marked clinical improvement. Clinicians should recognize this unusual but treatable cause of right-sided congestive heart failure.- - - - - - - - - - ranking = 0.2keywords = pressure (Clic here for more details about this article) |
9/77. Scleral ectasia as a complication of deep sclerectomy.Nonpenetrating deep sclerectomy is a filtration surgical technique to treat glaucoma. A 12-year-old girl presented with chronic arthritis complicated with glaucoma secondary to a chronic uveitis. A sclerectomy without a collagen implant was performed for uncontrollable glaucoma with deterioration in visual function. Three weeks later, the patient had a rise in intraocular pressure and a scleral ectasia on the sclerectomy. The eye showed an area of scleral ectasia in the bleb as well as iris adhesion. Partial resection of the bleb after iris detachment led to poor anatomic and IOP results. The indications for deep sclerectomy must be carefully considered, especially in patients at a young age with this type of glaucoma.- - - - - - - - - - ranking = 0.2keywords = pressure (Clic here for more details about this article) |
10/77. Isolated dilation of the trigono-inferior horn--four case reports.Four patients presented with isolated dilation of the trigono-inferior horn associated with either mass lesion at the trigone of the lateral ventricle or with shunt over-drainage. We investigated clinical symptoms, course, and neuroradiological findings of these cases. The pressure of the isolated ventricle was measured or estimated at surgery in all cases. The common symptoms were recent memory disturbance and contralateral homonymous hemianopia. Contralateral hemiparesis was observed occasionally. Rapid deterioration of the isolation caused uncal herniation in one case. Comma-shaped dilation of the inferior horn was observed in all cases. Midline shift was not conspicuous except in one case. Intraventricular pressure at surgery was 18 cmH2O, 35 cmH2O, 3 cmH2O, and within normal range. These cases had very similar clinical symptoms and neuroradiological findings. The pathophysiology of isolation suggested three types of isolation (high-, normal-, and low-pressure isolation), depending on the pressure of the isolated ventricle. The isolation of trigono-inferior horn is an important clinical entity as it may cause uncal herniation in patients with high-pressure lesions.- - - - - - - - - - ranking = 1keywords = pressure (Clic here for more details about this article) |
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