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Biomedical subjects

E Ferrer

Publications and source records attributed to E Ferrer.

At least 109 records · Page 6Linked to original sources
PubMed1986

Rotational autograft, reconstruction of the anterior segment, and intraocular lens implantation.

Six patients were affected by extensive central corneal scars and disruption of the anterior segment. Reconstruction of the anterior segment, synechialysis, membranectomy, and vitrectomy were performed as first-step procedures. Rotational autografts combined with either anterior or posterior chamber intraocular lens implantation were then performed. The results in this series of severely traumatized eyes were satisfactory with a follow-up of three years.

Adolescent↗
PubMed1986

Direct intracavernous obliteration of high-flow carotid-cavernous fistulas.

Four cases of high-flow carotid-cavernous sinus fistula (CCF), three of them posttraumatic and one spontaneous, have been treated by a direct surgical approach to the cavernous sinus. The CCF's were obliterated by the introduction into the cavernous sinus of muscle fragments and/or fibrin sealant. In the three cases with a preoperatively patent internal carotid artery (ICA), the CCF was occluded and the ICA flow preserved. One of these also had a posttraumatic false aneurysm that enclosed the two avulsed ends of a transected intracavernous ICA. This was treated by cervical ICA ligation following resolution of the CCF. A fourth patient, who had previously undergone an unsuccessful ICA trapping procedure elsewhere, also obtained a good result. The case histories and the surgical technique are presented. Direct intracavernous obliteration with muscle fragments and fibrin sealant fulfills the criteria for treatment of high-flow CCF's: occlusion of the arteriovenous fistula and preservation of the ICA circulation. While this surgical technique is a therapeutic option in some cases, it appears to have precise indications in others.

Adult↗
PubMed1985

Managing dense retropseudosphakos membranes with a pars plana vitrectomy.

Formation of thick and occasionally dense retropseudophakos membranes and rapid fibrosis of the posterior capsule is a complication that adversely affects the outcome of intraocular lens implantation. We have observed this condition in 17 patients, most of whom presented with traumatic and congenital cataracts. It appears to occur more frequently in young individuals and children. Simple capsulotomy, by the limbal approach or with the YAG laser, does not reliably eliminate the membranes. We have used vitrectomy and scissors dissection through the pars plana to achieve good anatomical results. Postoperative visual acuity has been satisfactory, except in amblyopic eyes related to congenital cataracts.

Adolescent↗
PubMed1985

Complications of intraocular lenses in children.

Complications in a group of 91 children with congenital and traumatic cataracts in whom intraocular lenses (IOL) have been implanted have been studied. The influence of viscoelastic substances (Healon) in the prevention and treatment of some of these complications, and as a causal factor in others, is presented. Ten different styles of lenses were implanted allowing a comparison of the relationship between the type of lens fixation and the complications observed.

Adolescent↗
PubMed1982

[Separation of cells of the erythrocyte series of birds and mammals by distribution in biphasic polyethylene glycol-dextran systems].

Experimental conditions for the partition, in dextran (Dx) polyethylene glycol (PEG) biphasic systems, of circulating red cells, reticulocytes and bone marrow cells from adult rats, as well as of erythrocytes from chicken embryos, young animals and adult chickens, have been studied. Once the partition coefficient (K) has been calculated under optimal experimental conditions, a counter-current distribution (CCD) apparatus has been used for the separation of cells in those populations, and the influence of different factors on the distribution of cells has been analyzed. An increase in the distribution efficiency of heterogeneous cells (those from the chicken and bone marrow of rats) is achieved by increasing the sedimentation time during the CCD procedure. The position of cells (previously labelled with 59Fe) along the rotor of the CCD apparatus is related to cells age, and thus allowed us to apply the CCD procedure for the assay of some enzyme activities in the separated cells.

Animals↗
PubMed1979

[Study of the causes of death in a hemodialysis unit (author's transl)].

A review is made of the deaths which occurred in a hemodialysis unit between 1969 and 1977. Sixty-two patients were treated during this period, 18 of whom died. The actuarial percentages of survival are also established. The mortality rate was 15.5 percent during the initial period and 31.5 percent after the fourth year. Deaths in the first monts were caused by cardiac and infectious complications. Those occurring at a later period resulted from the lack of good vascular access which is necessary to maintain a good quality of dialysis.

Adolescent↗
PubMed1979

Cerebral mixed tumour: osteo-condrosarcoma--glioblastoma multiforme.

A 49-year-old woman had a left frontal expanding mass with calcified areas. A craniotomy and resection of the mass were performed. Histological sections showed a mixed tumour: osteochondrosarcoma-glioblastoma multiforme. The absence of previous irradiation and its location, deep in the frontal lobe and apparently unattached to the meninges, add to the rarity of this association. A brief discussion concerning the presence of osseous or cartilaginous areas in brain tumours and the problem of cerebral mixed tumours follows the description of the case.

Brain Neoplasms↗