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The present study was conducted to compare meiotic and cytoplasmic competence of prepubertal and adult porcine oocytes, and the effects of EGF (0 to 100 ng/mL), FSH (0 to 400 ng/mL) and prepubertal pFF (0 to 10%) on nuclear maturation. Prepubertal oocytes were less responsive to FSH and pFF than were adult oocytes in terms of stimulation of nuclear(More)
The objective of this study was to determine if administration of a set dose (10 microg) of a gonadotropin-releasing hormone agonist, buserelin (Receptal; Rc), at set times after altrenogest (Regumate; RU) treatment or after weaning was able to induce and synchronize ovulation in female swine (gilts and sows). The pubertal (n=187) gilts were allocated to(More)
Acute overlapping of successive laser pulses onto the cornea during photorefractive keratectomy (PRK) is important to avoid refractive distortions. Most excimer laser systems performing corneal ablation lack control of the patient's eye movements and they cannot track the target corneal zone. We developed an eye-tracker based on television monitoring of the(More)
The aims of this study were: (1) to evaluate the effect of the number of previous estrus of recipient gilts on effectiveness of intrauterine insertion of a flexible catheter designed for non-surgical deep intrauterine catheterization during diestrus in pigs; and (2) to determine the farrowing rate and the litter size after non-surgical deep intrauterine(More)
OBJECTIVE To investigate whether 193-nm excimer laser photorefractive keratectomy for the correction of myopia can determine in vivo changes in the human corneal endothelium 3 and 12 months after surgery. METHODS Contact wide-field specular biomicroscopy of the central corneal endothelium was performed on 76 eyes of 61 patients (aged 20 to 49 years; mean,(More)
The transplantation of fetal porcine neurons is a potential therapeutic strategy for the treatment of human neurodegenerative disorders. A major obstacle to xenotransplantation, however, is the immune-mediated rejection that is resistant to conventional immunosuppression. To determine whether genetically modified donor pig neurons could be used to deliver(More)
Topical corticosteroids are given commonly after photorefractive keratectomy (PRK). We present six eyes treated for correction of myopia ranging between -6.00 and -8.00 D, to whom corticosteroid drops were given and then suspended. Each eye had an increase in myopia with a mean of 2.00 D (range 1.00 to 3.50 D). All were then treated with topical(More)
This is the first report of a severe case of Mycobacterium chelonae keratitis; it occurred in a 26-year-old man after he had undergone excimer laser photorefractive keratectomy for the correction of severe myopia, once the epithelium was already healed. The diagnosis was made by culture results and acid-fast staining of corneal scrapings. Topical(More)
PURPOSE The latest development in the erodible mask technology is an excimer laser containing the mask in the laser optical pathway. This paper reports the results of the first human series of consecutive treatments performed for the correction of compound myopic astigmatism. METHODS We have treated 83 eyes. Spherical equivalent attempted correction(More)
BACKGROUND The erodible mask is a new energy delivery system for the 193-nm argon fluoride excimer laser. It consists of a polymethyl-methacrylate button, whose profile is transferred by photoablation onto the corneal surface. We present the 6- and 12-month results of this technique in the correction of compound myopic astigmatism. METHODS We performed(More)