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Biomedical subjects

V Paris

Publications and source records attributed to V Paris.

At least 19 recordsLinked to original sources

Nosogogy: when the learner is a patient with chronic renal failure.

Patient education approaches are currently derived from a biomedical 'acute' model characterized by the sequence of health, disease, and recovery resulting from our professional intervention. Unfortunately, this model proves to be totally inadequate when applied to a chronic disease such as kidney failure. Our patients never fully regain their health and may continue to worsen under our care, even after many state-of-the-art treatments. The solution is represented in acquiring a new professional identity, shifting from the 'biomedical' acute model to a 'bio-psycho-social-educational model'. Within this model, a Therapeutic Education approach in predialysis has been proven to provide both short- and long-term positive results for renal patients. There is a tremendous difference between the learning processes in children and adults and two different sciences have already been described. 'Pedagogy' deals with child learning and 'Andragogy' with adult learning. Nevertheless, when the learner is a patient with a chronic disease, we believe that new considerations must be taken into account. We propose to create a novel science and to call it 'Nosogogy', derived from the ancient Greek word (see text), meaning 'disease'. Nosogogy could be defined as the science of teaching adults affected by chronic disease. The new educator is someone deeply involved in renal care who knows and understands the characteristic conflicts and dynamics that arise in the renal patient, and possesses adequate communication skills to deal with him. In our experience, we prefer to have educational sessions run by nephrologists and nurses who have great experience in the field.

Humans↗

Patient re-training in peritoneal dialysis: why and when it is needed.

The aim of this multicenter, quantitative, observational study was to analyze compliance and re-training needs of patients on peritoneal dialysis (PD) through the assessment of patient knowledge (with a Patient Questionnaire; phase 1) and patient behavior (home visit with a Score Card; phase 2). A total of 353 patients from 11 Italian centers participated in the first phase and 191 patients from nine centers in the second phase. Overall, 66% of questions on the Patient Questionnaire were answered correctly. Correct answers were more frequent in females than males, in patients under 55 years of age, and in those with higher education. The lowest rate of correct answers involved questions related to diet and physical activity (67% and 51%, respectively). Data collected during the home visit showed that 25% of patients were partially compliant with their drug therapy. Twenty-three percent of patients were non-compliant with the exchange protocol procedures, with a significant association between compliance and the incidence of peritonitis, and 11% were non-compliant with the exit-site protocol procedures without a statistically significant correlation to peritonitis. By combining the two evaluations, we found that approximately one-third (29%) of patients needed reinforcement of knowledge and ability to correctly perform PD as related to infection control and 27% for the correct use of drugs. Looking at the combined evaluation of infection control and drug use, results showed that 47% of patients needed re-training. This need for re-training was greater for younger patients (less than 55 years old), patients with lower education degree and patients in the early or late phase of PD therapy (less than 18 months or more than 36 months). Gender and degree of autonomy had no effect on the need for re-training.

Aged↗

[Advantages of Krats's laser pointer associated with the Weiss coordimeter in the study of cyclofusion].

INTRODUCTION: The cyclofusional abilities of some patients can lead to an underevaluation of their deviation. This study proposes an original and specific analysis of cyclofusion and discusses its practical applications. PATIENTS AND METHOD: We followed 19 consecutive patients, 14-69 years of age (mean, 43.7 years), presenting slight excyclotorsion (measured by the striated Maddox glasses), never exceeding 4 degrees and often at 0 degrees (63%) even in down gaze. A positive Bielschowsky head tilt test was assessed in all cases but was moderate in 75%. Objective excyclotorsion was observed in 12 out of the 14 documented cases. Diplopia was present (essentially in lateral gaze) in 68%, despite a small vertical deviation in primary position and in lateral gaze. Krats's linear pointer was associated with the Weiss coordimeter (fusional and nonfusional forms) to study the topographic measurements of the torsion in relation to fusion. All cases presented an unilateral form of symptomatology. RESULTS: In all cases but one, our method was more specific than the Maddox glasses in demonstrating the presence and the variation of the excyclotorsion. We completed this analysis by comparing the two coordimetric forms for a successful prescription of vertical prisms in four cases. Torsional surgery was proposed to two patients and successfully conducted in 13 other cases. CONCLUSION: This methodology provided improved specificity of the topographic measurement of the cyclodeviation, for a better comprehension and treatment of this underevaluated symptomatology.

Adolescent↗

[Fusion consequences of a weak oculomotor deviation: clinical analysis of frequent under-evaluation].

We propose a retrospective study of symptomatic patients presenting an oculomotor deviation of small amplitude. Our population was separated in four groups depending on the type of the deviation and on the retinal correspondence. The first three groups had a normal retinal correspondence (NRC) and a torsional (group 1: N = 3), vertical (group II: N = 6) or horizontal (group III: N = 7) deviation. In group I there was no measurable subjective torsion and the verticality was inferior to 5PD and controlled by fusion in primary position. In group II and III, the maximal deviation was 5 PD and 8 PD respectively. The group IV (N = 7) was composed by patients with abnormal retinal correspondence (ARC) and small amount of horizontal deviation (< or = 15 PD). In the groups with NRC, the use of simple clinical tests (prism's bar for vertical and horizontal deviations, fundus photographs and Weiss coordimeter for torsionnal deviations) could analyze the corresponding fusional amplitude. The complaints were successfully treated by simple means in all cases. With surgery in two cases in group I, with a pure optical treatment in one case of group II and one case of group III. All others received small power prisms. We do insist on the simplicity and the efficacy of our diagnostic and therapeutic means to help patients suffering from long term underevaluated symptomatology.

Accommodation, Ocular↗

[Ametropia and heterophoria "against the rules": a solution with prisms].

This study presents the results of the prescription of small prisms in ametropic patients whose glasses increase the associated heterophoria (which we have called heterophoria "against the rule"). It concerns the myopic eso (group I), the hyperopic exo (group II) and the presbyopic exo (group III) as a particular subgroup of the former. In a population of 211 patients wearing prisms, we have selected 53 in the first group, 34 in the second group and 20 in the third group. The 3 groups were compared according to the age and the fusional complaints of the patients. In 70 to 80% of the cases the associated ametropia was very small. In more than 60% of the cases the total prismatic prescription never exceeded 2 PD. A decrease or a suppression of the prisms was possible in 50% of the cases in groups I and II and in 15% in group III. Respectively 87%, 89% and 86% of the cases became asymptomatic in each category after a mean follow-up of 6.8--4.7--5.8 years (range: 2-12). No complaint was increasing during this period and no prismatic prescription exceeded a total amount of 5 PD. A familial factor was present in 18% of the cases. This study underlines the fact that the limit of tolerance of a latent phoric unbalance is more important that the amount of heterophoria itself. This observation is fundamental for understanding the apparent paradoxal behaviour of these patients and the efficacy of an apparent "homeopathic" prescription of prisms.

Adolescent↗

[An alternative treatment for amblyopic strabismus: optical penalization].

The aim of this study is to demonstrate the efficacy of the systematic prescription of an overcorrection of +2 to +2.5 D in 89 patients with a persisting pathological dominance of fixation after treatment by prisms and calibrated filters. The second criterion of prescription was the absence of any short term surgical plan. The percentage of compliance was 89% but 93.5% of the patients achieved a visual acuity > or = to 7/10. Besides the visual result, this method improved the motor instability in 68% of strabismic patients with a deviation of 10 to 20 PD. Two cases recovered a normal retinal correspondence and a stereoacuity of 60" measured at the TNO test. The mean age of the optical penalization is 5.2 years (range: 2 to 10.5 y.) and the mean duration 2.3 y. (range: 0.5 to 4.5 y.). The minimal age of evaluation was 7 y. This method is simple and efficient and appears to be the best way to the long term success of strabismic functional amblyopia.

Amblyopia↗

Impaired saccadic eye movement in diabetic patients: the relationship with visual pathways function.

The aim of this study was to evaluate whether a correlation existed between saccadic eye movements and visual pathways function in diabetic patients. Saccadic or fast Eye Movement System (EMS) and Visual Evoked Potentials (VEPs) were assessed in 20 insulin-dependent diabetic mellitus (IDDM) patients without long-term complications and in stable metabolic control and in 21 age-matched control subjects. In IDDM patients we observed significantly (p<0.01) longer EMS latency, while EMS velocity and accuracy were similar to those of controls; VEPs showed a significant delay in N75, P100, N145 latencies and significant reduction of N75-P100 and P100-N145 amplitudes. In IDDM patients no relationships between EMS and VEP parameters were found. In conclusion, EMS latency delay suggests an impairment of the saccadic eye movement system, while impaired VEPs may be ascribed to a dysfunction of the visual pathways. The lack of correlation between VEPs impairment and EMS latency delay suggests that in our IDDM patients the delay of saccadic latency cannot be exclusively related to a visual pathways dysfunction and could be ascribed to a diffuse neuronal involvement.

Adult↗

[Prismatic treatment for heterophoric decompensation after onset of presbyopia].

This study presents the results of the prescription of small prisms in horizontally (N = 11) and vertically (N = 5) heterophoric patients after the onset of presbyopia. There was a high incidence of diplopia (69%) at an age where fusionnal adaptation capacities are limited. Prismatic treatment released the diplopia and asthenopic complaints in 100% of the cases. The prisms were easily included in prescriptions for progressive lenses in half of the cases. Their strength was eventually decreased in 12.5% of the cases, and they were totally eliminated in 12.5%. The prescription had to be increased in only one case. The mean follow-up was 2.8 years (with a range from 1 to 7.5 years).

Adaptation, Physiological↗

[Specific cases of normo-sensorial strabismus: accommodative microstrabismus].

This study shows that, in a population of microstrabic patients (N = 76), a regain of a normal stereoscopy was possible in 19.6 of the cases (14 cases). Of these patients, 14 were hyperopic. With the full hyperopic correction, the angle of deviation on the alternate cover test was 0.45 PD (range: 0 to 3 PD). Without correction the deviation increased to between 3 PD and 10 PD (mean: 6.3 PD). Ten patients presented an anisometropia between 0.75 D to 2.50 D. (mean: 1.4 D). All anisometropic patients were hyperopic and hyperopia was higher in the dominated eye in all these cases. These results demonstrate the interest of the definition of microtropia as a specific strabismological entity, which can be congenital or acquired and be influenced by accommodative factors. The incidence of anisometropia, as a consequence rather than a cause of the pathological dominance is discussed.

Accommodation, Ocular↗

[Study and analysis of a population of multi-operated strabismus].

We present a retrospective study of 28 consecutive patients who where operated three times or more with a total amount of operations of 99 (mean: 3.7). The main factors leading to a reoperation rate were analysed and discussed. Most of the patients were presenting a congenital pathology (96.5%) associated with early onset strabismus (85.7%) or superior oblique palsy (14.2%). The main factors for reoperations were DVD (78.5%), recurrence of esotropia (42%) and consecutive exotropia (32%).

Adolescent↗

[Intermittent exotropia : postoperative prismatic treatment].

The surgical treatment of intermittent exotropia remains a difficult problem. We present our results about our prismatic approach of the postoperative under- and overcorrections. The treatment of the overcorrections has to adapt to each case but we propose a stereotyped prismatic method (with a total amount of prismatic diopters never exceeding 5PD) to treat the undercorrections. This method is simple and well tolerated for a long term. It is especially useful in the cases of discrepancy between the far and near measurements.

Child, Preschool↗

[Weiss coordimeter: clinical contribution to the study of diplopia].

We used the Weiss' coordimeter for studying the fusional effort of 8 patients presenting asthenopic complaints and intermittent diplopia. This method allows us to compare the latent deviation of the visual axis with and without fusion. We analyse the comparative responses through the cases of two congenital superior oblique palsies, one esophoria and five exophoria. In seven out of the eight cases, we propose an appropriate prismatic treatment.

Asthenia↗

[Access to health care for the destitute].

An increasing proportion of low income people, in spite of receiving mandatory coverage, cannot afford supplementary insurance, and they cannot afford to advance payment for care which will lately be reimbursed, nor can they afford copayments. The results is that a growing proportion of French population is unable to access common care. Faced with this deteriorating situation, parallel delivery systems of care have been devised at a local level, facilities have been created, and health care providers volunteers to deliver health care to underserved populations. To estimate the extent of the phenomenon, CREDES carried out a specific survey at the national level. First we identified all health care providers or facilities accessible to the underserved. These include traditional providers or facilities, such as private physicians and hospitals which agree to provide "charity care". There are also new facilities created specifically to provide health care to the underserved. The second part of the survey covered the human resources, equipment and services offered at these specific facilities. It revealed the extensive participation by physicians and nursing staff generally on a voluntary basis and the special attention given to the reintegration of the underserved into the standard health care system through assistance with the necessary administrative procedures.

France↗

[Strabismic amblyopia: management and visual acuity].

This study presents the clinical history of 9 patients presenting an inversed amblyopia during the course of their treatment. A simple therapy was sufficient to restore the initial sensorial situation for all cases in a less than two months period. Two of these patients were presenting a so strong dominance of fixation that they were still fixing with their eye, even after becoming amblyopic. The use of the Gracis's biprismatic test is considered as an objective witness of the quality of the dominance and is illustrated through these examples. This test can make the difference between an inversed amblyopia and a real inversion of the initial amblyopic process. It permits to choose the type and the duration of the treatment using to prevent the recurrence of amblyopia.

Amblyopia↗

[Amblyopic strabismus: strategy for late treatment].

We show the result of the late treatment of 11 esotropic patients. The initial amblyopia has conditioned the analysis of our results. We defend the use of prolonged monocular occlusion, relayed by an optical penalization at far consisting on an hyperopic overcorrection of +2.50 D. This study confirms that the efficacy of the treatment depends principally on its compliance. We want to underline the danger of interrupting the occlusion too soon and without supervision.

Amblyopia↗

[Benefits of total hypermetropia correction in patients with strabismus].

This study compared the sensory status of 23 patients (19 children and 4 adults) before and after treatment with total hypermetropic correction. We have shown that binocular improvement can be obtained in every category of strabismological pathology, including exotropia, with the exception of early onset micro-strabismus. Three cases of late onset micro-strabismus (one divergent and two convergent) where total sensory cure was obtained are also described. We confirm the slow clinical progression of hypermetropia in the strabismic patient provided with total optical correction. The two examples reported, as well as our cursory review of recent literature, provide justification for the early, systematic prescription of total optical correction for strongly hypermetropic children (> 4 D).

Adolescent↗

[Role of topical anesthesia in strabismus surgery].

The use of topical anesthesia for strabismus surgery can be useful in selected, cooperative patients. This technique is always performed on an ambulatory basis, and the surgical time rarely exceeded 30 minutes. One of the major advantages of this type of procedure is the ability to adjust the sutures during the operation. The presence of diplopia is a major indication for topical anesthesia. The use of Gracis grids has proved extremely useful for assessing the dynamic evolution of the diplopia over the various visual fields during the operation. This allows the surgeon to better control his correction, with horizontal, vertical, or torsional diplopia. Finally, this study shows that a precise clinical examination allows excellent results while limiting surgery to a single muscle (in 12 of the 14 cases).

Administration, Topical↗

[Disparity of fixation in asthenopic syndrome].

This study provides the first description of a test of fixation disparity that can be used in daily clinical practice. Exploration of this problem lays a basis for understanding, and allows rational prescription of the use of small prisms for the treatment of asthenopia associated with horizontal heterophoria. The fixation disparity is opposite to the heterophoria in almost 30% of cases. The test has a specificity of 71,5% for a study population of 55 patients. When the disparity test was abnormal, use of this examination demonstrated that the prescription of an adapted prism was effective in all cases in eliminating the disparity. This prescription usually involved asymmetric prisms. We also found that complaints of non-specific neck and back pains tended to improve in parallel to the improvement in the asthenopia and the elimination of the disparity. We feel that these postural pains ares part of the asthenopia related to symptomatic heterophoria. The ability to study disparity in daily clinical practice will also provide the physician with a means to study the genetic relationships underlying tropias and phorias when disparity is abnormal.

Adolescent↗