Search results for "Pressure"
showing 10 items of 4493 documents
Myocardial hypertrophy is associated with inflammation and activation of endocannabinoid system in patients with aortic valve stenosis.
2013
article i nfo Article history: Received 1 February 2013 Accepted 22 March 2013 Aims: Endocannabinoids and their receptors have been associated with cardiac adaptation to injury, inflam- mation and fibrosis. Experimental studies suggested a role for inflammatory reaction and active remodeling in myocardial hypertrophy, but they have not been shown in human hypertrophy. We investigated the asso- ciation of the endocannabinoid system with myocardial hypertrophy in patients with aortic stenosis. Main methods: Myocardial biopsies were collected from patients with aortic stenosis (AS) and atrial myxoma as controls during surgery. Histological and molecular analysis of endocannabinoids and their r…
The course of intracranial pressure and volume-pressure relationships following extirpation of meningiomas and astrocytomas
1978
Thirty-five patients with meningiomas were compared with 37 patients with astrocytomas with respect to the postoperative course of their ICP and elastance. In the case of the meningioma patients, the ICP increased on average over a longer period and achieved higher values than in the astrocytoma patients. In the first group, the elastance attained values that were three times as high as in the second group. There was no fixed relationship between pressure and elastance in the two groups of patients.
Effects of hypertonic/hyperoncotic treatment and surgical evacuation after acute subdural hematoma in rats*
2007
Objective: The treatment of acute subdural hematoma (ASDH) consists mainly of surgical evacuation of the hematoma. It is conceivable that early preoperative neuroprotection with hypertonic/hyperoncotic treatment (HHT) can improve survival rates. The present study investigated the benefit of treatment with hypertonic/hyperoncotic solution on functional and histologic outcome as supportive therapy accompanying surgical intervention. Design: Laboratory experiment. Setting: University laboratory. Subjects: Male Sprague-Dawley rats weighing 296–350 g (n = 56). Interventions: ASDH was induced through subdural infusion of 400 μL of autologous venous blood. Thirty minutes after subdural blood infus…
Hypertonic saline solution and decompressive craniectomy for treatment of intracranial hypertension in pediatric severe traumatic brain injury.
2002
Experimental data 8 –11 and first clinical results in adults 12,13 suggest that hypertonic saline ( 1.0) may be highly effective in lowering ICP even when mannitol has lost its therapeutic potential after prolonged and repeated use. In children, only limited experience exists with the use of hypertonic saline solutions: a randomized prospective study in children with severe head injury compared the effects on ICP (increased to 15–20 mm Hg) of isotonic (0.9% NaCl) and hypertonic (3% NaCl) saline injections, demonstrating a beneficial effect of the hypertonic solution. 14 Another prospective randomized trial compared the effects of continuous infusion of either lactated Ringer’s solution (277…
Intraocular pressure in samples of elderly Finnish and Swedish men and women.
1994
Abstract Intraocular pressure was measured in 231 systematically sampled 75-year-old men and women in Goteborg, Sweden and in 284 75-year-old and 201 80-year-old residents in Jyvaskyla, Finland as part of a comparative study on functional capacity and health, NORA 75 (Nordic Research on Ageing). After excluding the cases reporting glaucoma in their medical history or using drugs for glaucoma treatment there were no significant differences in the distributions of intraocular pressure between the men (mean intraocular pressure in the right eye 15.1 mmHg, left eye 15.0 mmHg) and women (mean intraocular pressure in the right eye 15.5 mmHg, left eye 15.8 mmHg) in Goteborg. In Jyvaskyla the 75-ye…
Retinal light sensitivity of the central visual field among 70- to 81-year-old men and women.
2009
Retinal light sensitivity of the central visual field (0-30 degrees), visual acuity, intraocular pressure and pupillary size were screened in 42 men and 42 women aged 70 to 81 years. The subjects were randomly selected from the population register. After excluding the diagnosed glaucoma cases, the men had better visual field light sensitivity values than the women. They also had lower intraocular pressure and a wider pupillary diameter than the women, whereas there were no differences in visual acuity between the sexes. When the effect of pupillary size was controlled the differences in visual field light sensitivity values between men and women became non-significant. Among these elderly p…
Sulcus implantation of a single-piece foldable acrylic intraocular lens after posterior capsular rupture in cataract surgery.
2012
Purpose. To evaluate the safety of a foldable acrylic single-piece intraocular lens (IOL) in cases of complicated cataract surgery and sulcus implantation. The setting was University and private anterior segment surgery practices. Methods. In this observational case series study, 13 eyes of 13 patients were included after complicated phacoemulsification with extensive posterior capsule rupture with or without vitreous loss. A foldable acrylic single-piece IOL (Rayner Superflex 620H; Rayner Intraocular Lenses Limited, Hove, East Sussex, UK) was implanted in the ciliary sulcus in each eye. Postoperative follow-up included best-corrected visual acuity, anterior segment biomicroscopy, IOL centr…
Cornea in acromegalic patients as a possible target of growth hormone action.
2010
Background: GH exerts its effects on many organs and the eye also seems to be a target site, although few authors have investigated the corneal thickness in patients with acromegaly. Aim: To perform a detailed ophthalmological evaluation in acromegalic patients, in relation to disease activity. Material and methods: Twenty-eight acromegalic patients (11 males, 17 females) and 22 voluntary healthy subjects underwent complete metabolic and ophthalmological evaluation, including retinal thickness (RT), central corneal thickness (CCT), and intraocular pressure values (IOP). Results: Significantly greater CCT values were found in all acromegalic patients in comparison with controls (567 vs 528.5…
Vascular risk factors in glaucoma: The results of a national survey
2007
Background The role of vascular risk factors in glaucoma is still being debated. To assess the importance of vascular risk factors in patients with primary open-angle glaucoma (POAG), data from the medical history of 2,879 POAG patients and 973 age-matched controls were collected and analyzed. Methods Design: observational survey. Setting: 35 Italian academic centers. Study population: POAG patients and age-matched controls. In order to reduce bias consecutive patients were included. Observation procedures: data concerning vascular risk factors were collected for all patients with a detailed questionnaire. A complete ophthalmological examination with assessment of intraocular pressure (IOP)…
Deep sclerectomy versus punch trabeculectomy with or without phacoemulsification: a randomized clinical trial.
2004
Purpose: To compare the efficacy of non-penetrating deep sclerectomy without implant with Crozafon-De Laage punch trabeculectomy, and to evaluate the effect of simultaneous temporal approach phacoemulsification on both techniques. Patients and Methods: Setting: Department of Ophthalmology of the University of Palermo. Design: Prospective randomized clinical trial. Patients and intervention procedures: Sixty-five patients (65 eyes) with primary open angle glaucoma (POAG) or pseudoexfoliative glaucoma (PEXG): 32 eyes underwent non-penetrating deep sclerectomy (NPDS), 17 as single procedure and 15 combined with phacoemulsification (phaco- NPDS), and 33 eyes underwent punch trabeculectomy (PT),…