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Biomedical subjects

V Paris

Publications and source records attributed to V Paris.

31 records · Page 2Linked to original sources
PubMed1994

[Arguments against surgical correction of pure accommodative strabismus].

Studies have shown recently that the occurrence of a pure accommodative strabismus has to be treated immediately with a full optical correction to preserve the stereoscopy. The use of little prisms can be very useful to complete the medical treatment. The dysfunction of the oblique muscles is not frequent and often without clinical signification. The interest of a surgical overcorrection, specially if it is cyclo-horizontal, to suppress the spectacle is not proven.

Accommodation, Ocular↗
PubMed1993

[Surgery of the superior rectus muscle in children less than 2 years old].

DVD appears after DHD but is present in most of the cases before the age of 2. This article presents the results of a precocious surgery associating a bilateral recession of the medial recti with a uni or bilateral recession of one or both superior recti. The cause of bad results is analysed. Only 4% of the failures are unexplained.

Follow-Up Studies↗
PubMed1993

[Mini prisms in decompensated exophoria in children].

This paper gives an original method to treat "intermittent exotropia" with normal binocular vision. 25 consecutive cases of exotropia have been followed, 17 cases near horizontal prism and 3 oblique prism (in association with a congenital fourth nerve paralysis). 4 patients near glasses without prism and only one was treated surgically. The results are promising and this method completes well orthoptic reeducation.

Child↗
PubMed1992

[Screening and treatment of fixation dominance in primary microstrabismus].

The Gracis biprism appears to be the best actual method of testing eye fixation as early as 6 months. It is the appropriate test for microstrabismus screening. The treatment of the late onset microstrabismus is more simple than the treatment of the early onset microstrabismus, where the dominance of fixation is stronger. If the calibrated filters are sufficient in the first case, the optical penalisation (+ 2 D to + 3 D) on the dominant eye is the best long-term treatment in primary microstrabismus. Based on the specific aspects of the early onset strabismus, such as bi-ocularity and latent nystagmus, optical penalization without atropine offers an alternative long-term method to occlusion without any trouble of visual development of the fixating eye.

Eyeglasses↗
PubMed1992

[Orthoptic indications for radial keratotomy: esophoric myopia].

In addition to aniseikonia, binocular factors are to be taken into consideration for refractive surgery. If important exophoria can be a contraindication to refractive surgery, this surgery can be indicated in cases of marked esophoria at near and distance vision. It can then prevent the need for prismatic treatments which become necessary in these cases.

Adolescent↗
PubMed1990

[The use of Healon in surgery with adjustable sutures for strabismus].

In strabology surgery, the sensorial plasticity reduces a lot after age 10. The adjustment of 1 or 2 suture, 2 to 3 days after surgery, must enter in the current practice to offer a good result. With the viscoelastic substance as Healon, this technique gets more simple and less painful.

Child↗
PubMed1989

[Asymmetry of visual perceptive activity of faces and emotional facial expressions].

Eye movements were studied in 40 right-handed subjects during perception of symmetrical chimerical faces. These movements were recorded using an original system based on a differential optical method for the detection of corneal reflection and of the pupil made shiny. Under basal conditions, the first fixation was usually located in the left visual hemifield. The subjects spent more time gazing at the right hemiface (P less than 0.04). This visuo-spatial asymmetry in favour of the left hemispace was increased when the subject was requested to determine the emotional expressions of a new series of faces (P less than 0.002). Compared with basal conditions, the increase in the percentage of time spent in the left area was significant (P less than 0.035). An analysis performed on the first 3 seconds confirmed and amplified the differences observed. These results can partly be explained by reading habits and exploratory activity for symmetrical shapes. However, activation of the right hemisphere, specialized in the perception of faces and facial expressions, probably influenced visual exploration by drawing attention to the left area and favouring the left visual hemifield.

Adult↗
PubMedDate not supplied

Patient flow analysis and referrals--how 1,137 ESRD patients started dialysis during 1998-1999.

The study consisted in collecting and analysing data from 15 dialysis centres on referral modalities of 1,137 patients with end-stage renal failure starting renal replacement therapy. All the centres in question had implemented PFA Patient Flow Analysis, a management programme for pre-dialysis care from Baxter designed to help improve the collection of data on dialysis patients, from the first visit to a centre through to the start of renal replacement therapy. The aims of the study were threefold: a) describe patient referral modalities and the eligibility of patients for renal replacement treatment; b) determine how many early referrals (ERs) and late referrals (LRs)* have a permanent PD (Peritoneal Dialysis) or HD (Haemodialysis) access at the first treatment; c) for the main outcomes (permanent access at the first treatment and permanent dialysis treatment), compare the performance of centres that offer enhanced education with those that do not. The main characteristics (sex and age) of ERs (54%) are comparable to those of LRs. However, ERs generally have greater access to PD or the opportunity to choose the dialysis treatment. The vast majority (86%) have permanent access at the first dialysis treatment and a large number (44%) have PD as permanent dialysis treatment. Centres with structured pre-dialysis educational programmes experience a larger number of ERs, therefore ensuring better outcomes. For example, 66.3% of patients at centres with structured pre-dialysis educational programmes (compared to 48.2% at centres without enhanced education) start the dialysis treatment with permanent access; and more patients (40% vs. 22%) receive permanent PD.

Aged↗
PubMedDate not supplied

[Early or late referral patterns of 1137 patients starting dialysis in 15 Italian dialysis centres].

INTRODUCTION: Data on referral patterns of patients with end-stage renal failure starting renal replacement therapy were collected. The participating centres used the PFA Patients Flow Analysis (R) software programme, a Baxter tool designed to help improve data collection on dialysis patients from their first visit to the centre to the start of renal replacement therapy. METHODS: Data were collected on 1137 patients from 15 dialysis centres, mainly in northern Italy, with the aim of describing a) their referral modalities; b) their eligibility to renal replacement treatments; c) the number of early and late referrals utilising a permanent PD (Peritoneal Dialysis) or HD (Haemodialysis) access at the first treatment. RESULTS: Early Referrals (ERs) (54%) are comparable in terms of their main characteristics (sex and age) to Late Referrals (LRs) but they have wider access to a PD or to the opportunity of choosing their dialysis modality. The majority (89%) of all ERs, have a permanent access at the first dialysis treatment and a larger number (44%) have a PD as permanent dialysis treatment. Centres with structured pre-dialysis educational programmes achieve better outcomes: 66.3% patients vs. 48.2% without enhanced education start the dialysis treatment with a permanent access and more patients (40% vs. 22%) receive a permanent PD. CONCLUSIONS: Comparing centres with and without timely structured educational interventions seems to confirm the effectiveness of such education on the outcomes of ESRF patients.

Aged↗
PubMedDate not supplied

Preoperative radio-chemotherapy response as prognostic factor in colorectal cancer.

In order to demonstrate if radiotherapy (RT) is able to reduce the number of local recurrences and to increase the survival rate of patients (pts) with colorectal cancer, the authors are participating in a large randomized international trial with the goal of comparing patients treated with preoperative radiotherapy plus surgery and patients treated only by surgery. The authors noticed that some patients treated with preoperative radiotherapy showed a reduction in tumor size at the time of endorectal ultrasonography. The authors considered the incidence of recurrences in patients responsive to radiotherapy (RT responsive group), in patients non responsive to radiotherapy (RT non responsive group) and in patients not treated with radiotherapy (no RT group) with the aim of establishing if the responsiveness to preoperative radiotherapy could be considered a prognostic factor in colorectal cancer. After a three year follow-up RT responsive group (41 pts) showed no recurrences (0%); RT non responsive group (27 pts) showed 7 (25%) recurrences; no RT group (66 pts) showed 27 (41%) recurrences. Our data indicates that responsiveness to preoperative RT can be considered a prognostic factor. A large number of patients is required to confirm this observation.

Chemotherapy, Adjuvant↗
PubMedDate not supplied

[Care of skin infections in patients in peritoneal dialysis].

The incidence of exit-site infections among peritoneal home-dialysis patients was quantified following for 1 year all home dialysis patients of 23 dialysis centres. The exit site conditions were observed and classified according to Twardowsky. When an infection occurred data on its treatment were collected. 393 patients were observed. The infection occurred in 40 patients (10.1%). 82.2% of patients wear a Tenckoff catheter, 3% do not protect the exit site with any kind of dressing. The strategies adopted by different centres vary for the choice of antiseptics, the suggested frequency of changes dressing and the routine use of nasal swabs. Due to the limited number of patients with infection no association was found between tunnel direction or frequency of dressing changes and infections occurrence. Discussion on controversial aspects and the definition of common guidelines for instance for frequency of dressing changes, use of antiseptics is warranted.

Adult↗