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1.
J Anim Sci ; 92(7): 3108-15, 2014 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-24778333

RESUMO

Ability to select service sires that minimize partial or complete losses of pregnancy could have major economic impacts in sheep production systems. This study tested the null hypothesis that survival of potential progeny did not vary with breed type of service sire or among individual rams. Data included 980 ewes on 10 farms; each ewe was pregnant to 1 of 67 rams of 12 breeds. Number of conceptuses was estimated once during pregnancy by ultrasonography, either transrectal (embryos) or transabdominal (fetuses), and was compared with number of lambs born to estimate losses. Data were examined first for number of lambs born and second for documented losses. Individual service sires affected number born (P < 0.001), which varied from 0.70 to 2.45 lambs per pregnant ewe. The main effects of breed type on lambs born were not significant, but breed types of both service sires (P < 0.0002) and ewes (P < 0.001) interacted with diagnosed number of conceptuses. Lambs born varied with ewe age (P < 0.0001) and among farms (P < 0.0001), and statistically, farms interacted with number of diagnosed conceptuses (P < 0.0001); season had no effect. In documented losses, there were both main effects of individual service sire and a service sire × number of diagnosed embryos interaction (P < 0.005). Thus, ewes bred to some rams were more apt to lose single pregnancies, whereas ewes bred to other rams were more apt to lose 1 or more embryos or fetuses from multiple pregnancies. Breed type of service sire affected (P < 0.05) prenatal death. Complete losses of single conceptuses tended to be greater in ewes bred to black-faced or hair-type rams (service sire breed type × number of diagnosed conceptuses; P < 0.09). Breed type of ewes also varied in incidence of complete losses (P < 0.05); hair-type ewes (46%) lost more (P < 0.02) documented conceptuses from examination to birth than black-faced (27%), white-faced (20%), or dairy-type (25%) ewes. Greater losses of singles than of multiples occurred in black-faced (37% vs. 18%) and hair-type (64% vs. 27%) ewes than in other breeds (ewe breed type × number of conceptuses; P < 0.03) per ewe. Surprisingly, purebred conceptuses were lost less often (24%) than crossbreds (36.4%; P < 0.002). Selection of rams based on records of prenatal losses in ewes they serviced may be a method to decrease embryonic and fetal wastage. However, further study to determine repeatability of differences among service sires from year to year will be required.


Assuntos
Cruzamento/métodos , Reprodução/genética , Ovinos/genética , Fatores Etários , Criação de Animais Domésticos , Animais , Cruzamento/normas , Feminino , Mortalidade Fetal , Gravidez , Reprodução/fisiologia , Estações do Ano , Ovinos/fisiologia
2.
Anim Reprod Sci ; 126(3-4): 162-7, 2011 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-21757303

RESUMO

Generally, unilateral ovariectomy before a critical period in the latter part of the estrous cycle induces a transitory increase in plasma FSH, which causes subordinate follicles to develop and maintain ovulation rates characteristic of the species. A limiting period for subordinate follicles to assume dominance and from which ovulation occurs has not been shown for cattle. Growth and/or regression of subordinate follicles were characterized following removal of the dominant follicle at different days of the luteal phase of the estrous cycle in cattle in this study. In the mid-luteal phase (Day 13 or 15), the ovary with the dominant follicle of the second wave was ablated via unilateral ovariectomy; the corpus luteum also was removed. In the late luteal phase (Day 17 or 19), the dominant follicle was ablated with an ultrasonically guided 20 gauge needle. When the dominant follicle was removed on Day 13, the largest subordinate follicle of the second wave of follicular development became dominant and ovulation occurred from this follicle in 4 of 4 animals. However, when the dominant follicle was removed on Day 15, 17 or 19, a new wave of follicular development was induced in 14 of 15 animals. Moreover, the recovered subordinate follicle of the second wave of follicular development had similar growth characteristics to naturally occurring dominant follicles. In conclusion, the subordinate follicle in the second follicular wave in cattle retained the ability to become dominant, but this ability was lost by Day 15 of the estrous cycle. However, cattle then were able to maintain ovulation by developing a new wave of follicular growth.


Assuntos
Bovinos/fisiologia , Ciclo Estral/fisiologia , Folículo Ovariano/fisiologia , Animais , Feminino , Fase Luteal/fisiologia , Ovariectomia/veterinária , Ovulação/fisiologia
3.
Domest Anim Endocrinol ; 39(2): 147-54, 2010 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-20603027

RESUMO

Bacterial infection shortly after mating interferes with establishment of pregnancy. Injection of peptidoglycan-polysaccharide (PG-PS), a component of gram-positive bacteria, into sheep on day 5 after mating reduces pregnancy rate. Experiments were designed to evaluate the acute-phase response (APR) in ewes to injection of PG-PS on day 5 after mating (day 0). Catheters were inserted into the jugular and posterior vena cava on day 4. On day 5, ewes were challenged with saline or 30 microg/kg body weight (BW) PG-PS (Exp 1) or 60 microg/kg BW PG-PS (Exp 2). Blood samples were collected every 15 min for 6 h (Exp 1) and every 15 min for 2 h, hourly for 12 h, and at 24, 36, and 48 h (Exp 2). Body temperature and clinical signs of infection were monitored in Exp 2. Plasma was assayed for concentrations of a pro-inflammatory cytokine, tumor necrosis factor-alpha (TNF-alpha); 2 APR proteins, serum amyloid A (SAA) and haptoglobin (Hp); and progesterone (P(4)). Ewes injected with 60 microg/kg BW PG-PS exhibited fever, vaginal discharge, loss of appetite, and lethargy. After challenge with either 30 microg/kg or 60 microg/kg BW PG-PS, TNF-alpha increased in the posterior vena cava. Concentrations of SAA and Hp in the jugular increased after challenge with 60 microg/kg BW PG-PS. Only half (5/10) of the ewes treated with 60 microg/kg BW PG-PS had ultrasonically visible embryos, and none of them had functional corpora lutea (CL) (<1 ng/mL of P(4)) on day 21. On the other hand, 8/9 (88.9%) control ewes had visible embryos and all had functional CL on day 21. Using logistic regression, pregnancy on day 21 was predicted to depend on concentrations of TNF-alpha and Hp on day 5 and concentration of P(4) on day 14. In summary, injection of PG-PS on day 5 after mating resulted in fever; increased concentrations of TNF-alpha, Hp, and SAA on the day of and the day after the PG-PS challenge; and decreased concentrations of P(4) on days 14 and 21. These factors were related to failure to establish pregnancy.


Assuntos
Proteínas de Fase Aguda/imunologia , Infecções por Bactérias Gram-Positivas/imunologia , Peptidoglicano/imunologia , Prenhez/imunologia , Fator de Necrose Tumoral alfa/imunologia , Reação de Fase Aguda/imunologia , Animais , Corpo Lúteo/imunologia , Relação Dose-Resposta a Droga , Feminino , Infecções por Bactérias Gram-Positivas/sangue , Haptoglobinas/imunologia , Imunidade Inata , Peptidoglicano/administração & dosagem , Polissacarídeos/administração & dosagem , Polissacarídeos/imunologia , Gravidez , Resultado da Gravidez/veterinária , Prenhez/fisiologia , Progesterona/sangue , Progesterona/imunologia , Proteína Amiloide A Sérica/imunologia , Ovinos , Fator de Necrose Tumoral alfa/sangue
4.
Theriogenology ; 72(4): 566-71, 2009 Sep 01.
Artigo em Inglês | MEDLINE | ID: mdl-19501392

RESUMO

Reduced capability of the uterus to support pregnancy in the absence of its interaction with secretions from male accessory glands has been demonstrated in rodents and to some extent in pigs. However, in cattle, the role of postmating inflammatory response on pregnancy success has not been studied. The current study examined the influence of uterine presensitization with seminal antigens at breeding on pregnancy outcome in cows. Lactating beef (n=1090) and dairy (n=800) cows received 0.5 mL seminal plasma (SP), 40 ng recombinant human transforming growth factor-beta1 (rhTGF-beta1), or 0.5 mL bovine serum albumin (BSA), or were left untreated before or at insemination. Semen was deposited into the anterior cervix using a second insemination gun. Pregnancy was diagnosed at 35 to 40 d postinsemination by transrectal ultrasonography or from records of calves born the subsequent calving season. Pregnancy rates in beef cows did not differ among treatments but differed among trials (69.8%, 52.5% vs. 40.3%; P<0.05). In trials where average pregnancy rates were below 50%, treatments with TGF-beta1 but not SP tended (P<0.07) to increase pregnancy rates in beef cows. In dairy cows, SP and TGF-beta1 improved pregnancy outcome by 10 percentage points, but these increments did not achieve statistical significance. In conclusion, this study did not find any conclusive evidence for the effect of TGF-beta1 or seminal plasma on pregnancy outcome in lactating dairy or beef cows but realized marginal improvements when pregnancy rates were below 50% (compromised fertility).


Assuntos
Cruzamento/métodos , Inseminação Artificial/veterinária , Resultado da Gravidez/veterinária , Proteínas Recombinantes de Fusão/farmacologia , Sêmen , Fator de Crescimento Transformador beta1/farmacologia , Animais , Bovinos , Feminino , Humanos , Inseminação Artificial/métodos , Masculino , Gravidez
5.
J Anim Sci ; 87(7): 2428-36, 2009 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-19359512

RESUMO

The effect of shifting calf-weaning age on profiles of energy status (BW, BCS, and rib and rump fat) and reproductive performance of beef cows was evaluated in a 3-yr study. Pregnant and lactating crossbred beef cows (n = 408), mainly of Angus and Hereford breeding, were stratified by age and by sex and BW of their calves and assigned randomly into 2 treatments: weaning at approximately 180 d (early weaning) and normal weaning 45 d later (control). Cows were managed together on native range pastures and supplemented with harvested forage during the winter months. Cow BW, BCS, rib fat, and rump fat were measured periodically from early weaning through the next breeding. Reproductive performance was evaluated by calving intervals (CI), days from initiation of breeding to calving (BCI), retention in the herd, and adjusted 205-d weaning BW of the subsequent calf. Early weaned cows had greater (P < 0.001) BW at normal weaning than control cows, but the overall pattern of cow BW did not differ (P > 0.05) among treatments. Peak and nadir BCS occurred at precalving and postcalving periods, respectively and were greater (P < 0.001) at each period in early weaned than in control cows and in cows > or =5-yr-old than in younger cows. Patterns for rib fat and rump fat were nearly identical to those of BCS except for the 3-way interaction (P < 0.001) of treatment, age, and period on rump fat. Mean CI (372.4 +/- 2.1 d) and BCI (299.7 +/- 1.9 d) were not affected (P = 0.42) by treatment but varied (P < 0.001) with age of the cow. Age of cow accounted for 16% of total variation in CI and 12% of total variation in gestation length (P < 0.001). The intervals were longer (P < 0.001) in primiparous cows than in older cows. Early weaning decreased risk of culling in cows and thereby increased (P < 0.05) overall persistence by 11% over control cows. Earlier weaning of cows in the previous year increased (P < 0.001) weaning weight of the subsequent calf by 8.6 kg per cow per yr. Shifting weaning time increased storage of consumed energy as evidenced by increased rump fat, for use later during high-energy demand, ultimately improving overall productivity of the cow-calf system.


Assuntos
Criação de Animais Domésticos/métodos , Bovinos , Metabolismo Energético/fisiologia , Reprodução/fisiologia , Desmame , Envelhecimento/fisiologia , Animais , Composição Corporal , Peso Corporal/fisiologia , Feminino , Lactação , Gravidez , Fatores de Tempo
6.
J Anim Sci ; 85(5): 1274-84, 2007 May.
Artigo em Inglês | MEDLINE | ID: mdl-17224462

RESUMO

Embryonic and fetal mortality reduce lambing rates and litter sizes, thus contributing to economic losses in the sheep industry. In the current study, the timing of late embryonic and fetal loss in ewes and the factors with which these losses were associated were examined. Ewes lambing and lambs born were compared with pregnancy diagnosis and counts of embryos by ultrasonography near d 25, 45, 65, or 85 of gestation. Approximately 19.9% of the ewes experienced late embryonic loss, fetal loss, or both; and 21.2% of the embryos or fetuses were lost from d 25 to term. Potential offspring were lost throughout gestation; 3.7% of embryos from d 25 to 45, 4.3% of fetuses from d 45 to 65, 3.3% from d 65 to 85, and 11.5% from d 85 to parturition; thus, approximately 3 to 4% of the potential offspring were lost for each 20-d period of pregnancy beyond d 25. A greater proportion of ewes lost one (36.7%) rather than all (20.5% single; 3.8% multiple) embryos or fetuses. The patterns of loss were similar in ewes mated during the anestrous season and the transitional period and did not vary with service period within breeding season or method of synchronization of estrus. Late embryonic or fetal losses were not related to the temperature-humidity index. Maternal serum collected near d 25, 45, 65, or 85 of gestation was assayed for concentrations of progesterone, estradiol-17beta , and vascular endothelial growth factor (VEGF). The proportions of embryos or fetuses lost were associated with breed type (P < 0.05), as were concentrations of progesterone (P < 0.01), estradiol (P < 0.05), and VEGF (P < 0.01). The relationships of loss or retention of pregnancy to hormonal variables at the 4 stages studied were limited. Complete and partial losses increased rapidly as maternal progesterone at d 25 decreased below 2 ng/mL (P < 0.05). Survival of fetuses within a litter from d 25 to 65 was greater for ewes with medium concentrations of VEGF near d 25 and from d 65 to parturition was greater for ewes with high concentrations of VEGF near d 45 (P < 0.05). In summary, late embryonic or fetal losses occurred from d 25 throughout gestation and varied with breed type and with concentrations of progesterone in maternal serum on d 25.


Assuntos
Aborto Animal/etiologia , Perda do Embrião/veterinária , Morte Fetal/veterinária , Doenças dos Ovinos/etiologia , Aborto Animal/sangue , Animais , Perda do Embrião/sangue , Perda do Embrião/etiologia , Estradiol/sangue , Feminino , Morte Fetal/sangue , Morte Fetal/etiologia , Gravidez , Progesterona/sangue , Fatores de Risco , Estações do Ano , Ovinos , Doenças dos Ovinos/sangue , Doenças dos Ovinos/genética , Fator A de Crescimento do Endotélio Vascular/sangue
7.
Reproduction ; 125(2): 295-9, 2003 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-12578543

RESUMO

Bacterial cell walls contain peptidoglycan (PTG), which, among other actions, induces fever. The present experiment evaluated the effects of PTG treatment on early pregnancy and blood plasma concentrations of reproductive hormones. Ewes were injected i.v. with saline or 15, 30 or 60 microg kg(-1) sonicated PTG (Streptococcus pyogenes) on day 5 after mating. Each dose of PTG induced fever. Pregnancy rate at day 25 was not related to incidence of fever but tended to differ among treatments (control, 100%; low, 100%; medium, 67%; high, 60%; P < 0.08). Combined pregnancy rate in ewes from control and low dose groups (100%) was greater than that in ewes from medium and high dose groups (64%, P < 0.01). Ewes with high 13,14-dihydro-15-keto-prostaglandin F(2alpha) (PGFM) concentrations had lower pregnancy rates (6 of 10) than those with low concentrations of PGFM (11 of 11; P < 0.05). Mean cortisol concentrations were higher in treated (2.8 +/- 0.28 microg dl(-1)) than in control (1.1 +/- 0.03 microg dl(-1)) ewes (P < 0.01); the pattern of secretion was biphasic and increased in all treated ewes (P < 0.01). Neither means nor profiles of oestradiol differed with treatment. Mean concentrations and the pattern of concentrations of progesterone were reduced in all treated ewes, as indicated by the time by treatment and linear interaction with treatment (1.2 +/- 0.1 versus 1.6 +/- 0.1 ng ml(-1), P < 0.01). Patterns of LH pulses did not differ from 0 to 4 h or 24 to 28 h after treatment; mean plasma LH concentration was lower in ewes treated with 0, 15 or 30 microg PTG kg(-1) than with 60 microg PTG kg(-1) (P < 0.01). Pregnancy status was not related to plasma concentrations or patterns of LH, oestradiol, progesterone or cortisol. Inflammatory mediators, such as PGF(2alpha), may act directly on the embryo or uterus in ewes treated with PTG.


Assuntos
Aborto Séptico/veterinária , Dinoprosta/análogos & derivados , Febre/veterinária , Peptidoglicano/efeitos adversos , Doenças dos Ovinos/sangue , Infecções Estreptocócicas/veterinária , Streptococcus pyogenes , Aborto Séptico/sangue , Animais , Dinoprosta/sangue , Estradiol/sangue , Feminino , Febre/sangue , Febre/microbiologia , Hidrocortisona/sangue , Hormônio Luteinizante/sangue , Gravidez , Progesterona/sangue , Ovinos , Infecções Estreptocócicas/sangue
8.
Ophthalmic Plast Reconstr Surg ; 17(5): 328-31, 2001 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-11642488

RESUMO

PURPOSE: To report patients who presented to the oculoplastics department for repair of cicatrical entropion after topical use of dipivefrin. To discuss the possible mechanisms of action and highlight the potential detrimental effects of dipivefrin on palpebral conjunctiva. METHODS: Retrospective consecutive noncomparative case series. Nine eyes from 6 patients, 74 years to 90 years of age, referred by ophthalmologists for repair of cicatricial entropion after at least 2 years of twice-a-day application of dipivefrin. RESULTS: After cessation of topical dipivefrin application and successful surgical repair of entropion, no recurrence of signs or symptoms has been reported. Moderate lymphocytic infiltration of the substantia propria of the conjunctiva of both upper and lower lid specimens was present, as was scarring and keratinization of the epithelium. CONCLUSIONS: Cicatrization in the substantia propria of the conjunctiva by excessive lymphocytic infiltration after topically administered antiglaucoma drugs including dipivefrin is a possible mechanism of action for entropion.


Assuntos
Agonistas Adrenérgicos/efeitos adversos , Entrópio/induzido quimicamente , Epinefrina/análogos & derivados , Epinefrina/efeitos adversos , Pálpebras/efeitos dos fármacos , Idoso , Idoso de 80 Anos ou mais , Cicatriz/induzido quimicamente , Feminino , Glaucoma/tratamento farmacológico , Humanos , Masculino , Estudos Retrospectivos
9.
Ophthalmic Plast Reconstr Surg ; 17(4): 300-3, 2001 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-11476182

RESUMO

PURPOSE: To report the clinicopathologic features of a 17-year-old patient with primary Ewing sarcoma of the orbit. METHODS: The patient was evaluated clinically before surgery with computed tomography scans of the orbit. After surgery, the patient was staged with computed tomography scans and bone scan and was treated with systemic chemotherapy and radiation therapy to the orbit. The orbital biopsy was evaluated with conventional light microscopy and immunohistochemistry. RESULTS: Clinical evaluation revealed proptosis and limited upgaze. Computed tomography scans disclosed a mass involving the superior orbit, anterior cranial fossa, and temporal fossa. Microscopic examination revealed small, poorly differentiated cells with medium-sized nuclei containing finely granular chromatin and small nucleoli. The cytoplasmic borders of the cells were indistinct. A PAS stain revealed modest glycogen in many of the tumor cells. The tumor stained positive for O-13 and vimentin and was negative for neural, skeletal, and lymphoid cell markers. Computed tomography scan, bone scan, and blood chemistries revealed no other site of involvement. After treatment, the clinical symptoms and signs resolved, and there has been no evidence of residual orbital tumor or metastasis. CONCLUSIONS: Primary Ewing sarcoma of the orbit should be considered in the differential diagnosis of children or young adults with proptosis, diplopia, or periorbital swelling. Immunohistochemistry is essential to distinguish Ewing sarcoma from other small round cell tumors.


Assuntos
Neoplasias Orbitárias/patologia , Sarcoma de Ewing/patologia , Adolescente , Biomarcadores Tumorais/análise , Diagnóstico Diferencial , Feminino , Humanos , Neoplasias Orbitárias/química , Neoplasias Orbitárias/diagnóstico por imagem , Sarcoma de Ewing/química , Sarcoma de Ewing/diagnóstico por imagem , Tomografia Computadorizada por Raios X
10.
Ophthalmic Plast Reconstr Surg ; 16(6): 417-26, 2000 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-11106185

RESUMO

PURPOSE: To describe complications associated with laser resurfacing along with specific treatment recommendations. METHODS: The authors' experiences with laser resurfacing complications are discussed in conjunction with a review of published reports. Current preoperative and postoperative regimens are also presented. RESULTS: Postoperative erythema occurs in all patients and is considered a transient side effect, not a complication. Postinflammatory hyperpigmentation, hypopigmentation, scarring, wound infections, milia, ectropion, pain, acneiform eruptions, pruritus, and contact dermatitis are reported by multiple authors. Specific interventions combined with the passage of time allow most of these complications to resolve, leaving the patient with an acceptable final result. CONCLUSIONS: Although laser resurfacing is a safe and effective method of facial rejuvenation, the cosmetic surgeon must be aware of the various complications that may be encountered. Prompt recognition of complications and appropriate management provide the best opportunity for an acceptable aesthetic outcome.


Assuntos
Face/cirurgia , Terapia a Laser/efeitos adversos , Procedimentos de Cirurgia Plástica/efeitos adversos , Complicações Pós-Operatórias/etiologia , Complicações Pós-Operatórias/terapia , Antibacterianos/uso terapêutico , Anti-Inflamatórios/uso terapêutico , Beleza , Desbridamento , Humanos , Prognóstico , Reoperação
11.
J Anim Sci ; 78(11): 2942-9, 2000 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-11063320

RESUMO

Experiments were conducted in beef cows without a primary CL, in which pregnancy had been maintained with exogenous progestogen. In preliminary trials, replacement CL induced ipsilateral to the embryo and after, rather than before, d 36 of pregnancy, maintained more pregnancies after withdrawal of exogenous progestogen (13/13 vs 2/6; P < 0.05). In Exp. 1, in cows with replacement CL induced by treatment with hCG on d 28 of pregnancy, treatment with flunixin meglumine on d 31 through 37 did not increase maintenance of pregnancy. Experiment 2 was conducted to evaluate directly the effects of concentrations of PGF2alpha and estradiol-17beta during d 31 through 35 of pregnancy on maintenance of pregnancy by replacement CL induced between d 28 and 31. In cows that maintained pregnancy while progestogen was provided, maintenance of pregnancy after withdrawal of exogenous progestogen tended to be greater with high (5/5) than with low (2/6; P < 0.10) concentrations of PGF2alpha and greater with low (6/7) than with high (2/6; P = 0.10) concentrations of estradiol-17beta. Secretion of progesterone by replacement CL was greater (P < 0.05) in cows with high than in those with low concentrations of PGF2, during d 31 through 35. Prostaglandin F2alpha may facilitate attachment of the bovine embryo (d 30 to 40) in a manner similar to that reported for implantation in other species. Cows that did not form CL in response to hCG on d 28 to 31 responded well when retreated after d 36. Again, maintenance of pregnancy was greater when replacement CL were induced after (9/9) rather than before d 36 (8/16; P < 0.05).


Assuntos
Bovinos/fisiologia , Corpo Lúteo/fisiologia , Prenhez/fisiologia , Animais , Doenças dos Bovinos/etiologia , Gonadotropina Coriônica/farmacologia , Dinoprosta/sangue , Feminino , Morte Fetal/etiologia , Morte Fetal/veterinária , Gravidez , Progesterona/sangue
12.
Am J Ophthalmol ; 130(1): 117-9, 2000 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-11004270

RESUMO

PURPOSE: To present the carbon dioxide laser as an effective tool for surgical debulking of eyelid and orbital neurofibromas. METHOD: Two patients with neurofibromatosis underwent surgical debulking of their eyelid and orbital plexiform neurofibromas by means of the carbon dioxide laser. RESULTS: Acceptable cosmetic results were obtained with the removal of eyelid and orbital neurofibromas with improved hemostasis and minimal destruction of surrounding tissue when compared with conventional methods of removal. CONCLUSIONS: The carbon dioxide laser may allow significant improvement in the removal of plexiform neurofibromas.


Assuntos
Neoplasias Palpebrais/cirurgia , Terapia a Laser , Neurofibroma Plexiforme/cirurgia , Neoplasias Orbitárias/cirurgia , Adulto , Criança , Desbridamento/métodos , Neoplasias Palpebrais/patologia , Feminino , Humanos , Terapia a Laser/métodos , Masculino , Neurofibroma Plexiforme/patologia , Neoplasias Orbitárias/patologia , Resultado do Tratamento
13.
Ophthalmic Plast Reconstr Surg ; 16(4): 258-70, 2000 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-10923973

RESUMO

PURPOSE: To report the ophthalmic complications of Le Fort I osteotomy for the correction of dentofacial deformities and to determine the maximal compressive loads applied during pterygomaxillary separation in a cadaver model. METHODS: Two cases of ophthalmic complications arising after Le Fort I osteotomy are reported. Le Fort I osteotomy was performed on five cadavers. The maximal compressive load applied during pterygomaxillary separation was recorded with a 10 kN (3,000 lbf) load cell of a MTS Mini-Bionix servo-hydraulic machine (MTS, Eden Prairie, MN, U.S.A.). A paired t test was used to compare forces applied to the right and left sides. Computed tomography scans of each specimen were obtained after Le Fort I osteotomy to document secondary fractures. The skulls were subsequently stained with 1% fuschin red to highlight secondary fractures. RESULTS: Maximum compressive loads during pterygomaxillary separation ranged from 22 N (5.0 lbf) to 162 N (36.5 lbf), with an average of 106 N (23.8 lbf) (SD 47.6 N [10.7 lbf]). Forces applied on the first operative side were significantly greater than forces applied on the second operative side (p = 0.0034). Secondary fractures were found in three specimens by computed tomography and in two specimens by 1% fuschin red. All secondary fractures occurred on the second operative side. CONCLUSION: Secondary fractures in the Le Fort I osteotomy procedures occurred on the side opposite the greater maximal compressive load and on the second operative side.


Assuntos
Doenças Maxilares/cirurgia , Oftalmoplegia/etiologia , Osteotomia de Le Fort/efeitos adversos , Distúrbios Pupilares/etiologia , Fraturas Cranianas/etiologia , Osso Esfenoide/lesões , Transtornos da Visão/etiologia , Adulto , Idoso , Fenômenos Biomecânicos , Cadáver , Humanos , Masculino , Pessoa de Meia-Idade , Fraturas Cranianas/diagnóstico por imagem , Fraturas Cranianas/fisiopatologia , Osso Esfenoide/diagnóstico por imagem , Tomografia Computadorizada por Raios X
14.
Br J Neurosurg ; 13(3): 335-7, 1999 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-10562851

RESUMO

Fibrous dysplasia is a benign, developmental bone disorder of unknown aetiology. With involvement of the facial bones, indications for surgical intervention include cosmetic deformity and/or progressive neurological dysfunction. We present the case of a 36-year-old female with bilateral orbital lesions whose initial presentation was that of progressive proptosis and visual loss. She underwent bilateral pterional craniotomies with gross total resection of her tumours. Review of the literature reveals several cases of unilateral orbital fibrous dysplasia. This appears to be the first reported case of distinct, bilateral orbital fibrous dysplasia.


Assuntos
Exoftalmia/etiologia , Ossos Faciais , Displasia Fibrosa Poliostótica/complicações , Adulto , Craniotomia/métodos , Exoftalmia/cirurgia , Feminino , Humanos , Tomografia Computadorizada por Raios X
15.
Ophthalmic Plast Reconstr Surg ; 15(5): 349-54, 1999 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-10511215

RESUMO

PURPOSE: To determine the effectiveness of transconjunctival frontalis suspension in patients with blepharoptosis and poor levator function (eyelid excursion less then 5 mm). METHODS: The medical records of 29 patients (50 ptotic eyelids) were reviewed. RESULTS: Four patients (eight eyelids) had blepharophimosis syndrome, ten patients (27 eyelids) had congenital ptosis, seven patients (14 eyelids) had myogenic ptosis, and one patient (one eyelid) had neurogenic ptosis. Surgical results were good and complications were minimal during follow-up intervals ranging from six months to seven years. CONCLUSIONS: Transconjunctival frontalis suspension is technically simpler than traditional external frontalis suspension and yields satisfactory functional and cosmetic results in patients with poor levator function.


Assuntos
Blefaroptose/cirurgia , Túnica Conjuntiva/cirurgia , Pálpebras/cirurgia , Músculos Faciais/cirurgia , Músculos Oculomotores/cirurgia , Procedimentos Cirúrgicos Oftalmológicos/métodos , Adolescente , Idoso , Criança , Pré-Escolar , Feminino , Seguimentos , Humanos , Masculino , Satisfação do Paciente , Estudos Retrospectivos
16.
Ophthalmic Plast Reconstr Surg ; 15(5): 360-2, 1999 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-10511217

RESUMO

PURPOSE: To present a patient with congenital entropion of the upper eyelid caused by levator aponeurosis disinsertion. METHODS: Case report. RESULTS: Surgical correction of the levator aponeurosis disinsertion corrected the upper eyelid entropion. CONCLUSIONS: Congenital upper eyelid entropion may be caused by levator aponeurosis disinsertion and treated effectively by repairing the anatomic defect.


Assuntos
Entrópio/congênito , Anormalidades do Olho/etiologia , Pálpebras/anormalidades , Doenças Musculares/congênito , Músculos Oculomotores/patologia , Entrópio/cirurgia , Anormalidades do Olho/cirurgia , Pálpebras/cirurgia , Humanos , Recém-Nascido , Masculino , Doenças Musculares/cirurgia , Músculos Oculomotores/cirurgia , Procedimentos Cirúrgicos Oftalmológicos , Técnicas de Sutura
17.
Ophthalmic Plast Reconstr Surg ; 14(6): 398-402, 1998 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-9842559

RESUMO

A 68-year-old woman experienced an infection of a porous polyethylene orbital implant caused by Capnocytophaga after a dental procedure. The infection was unresponsive to both topical and oral antibiotics and required removal of the porous polyethylene orbital implant. Capnocytophaga is a capnophilic, gram-negative bacillus. Capnocytophaga is a normal commensal of the mouth and is responsible for both gingivitis and periodontal disease. Capnocytophaga is a rare cause of ocular infections. This is the first reported patient with an infection of a porous polyethylene orbital implant caused by Capnocytophaga. The authors believe infected integrated orbital implants must be removed because neither topical or systemic therapy provide effective treatment.


Assuntos
Capnocytophaga/isolamento & purificação , Infecções Oculares Bacterianas/microbiologia , Infecções por Bactérias Gram-Negativas/microbiologia , Implantes Orbitários/microbiologia , Polietilenos , Infecções Relacionadas à Prótese/microbiologia , Idoso , Antibacterianos , Quimioterapia Combinada/uso terapêutico , Infecções Oculares Bacterianas/tratamento farmacológico , Infecções Oculares Bacterianas/cirurgia , Feminino , Seguimentos , Infecções por Bactérias Gram-Negativas/tratamento farmacológico , Infecções por Bactérias Gram-Negativas/cirurgia , Humanos , Porosidade , Infecções Relacionadas à Prótese/tratamento farmacológico , Infecções Relacionadas à Prótese/cirurgia , Reoperação
19.
Domest Anim Endocrinol ; 15(3): 169-75, 1998 May.
Artigo em Inglês | MEDLINE | ID: mdl-9606598

RESUMO

Manipulation of one ovary in prepubertal gilts treated with pregnant mare serum gonadotropin (PMSG) and human chorionic gonadotropin (hCG) results in cysts on the manipulated ovary and corpora lutea (CL) on the non-manipulated (control) ovary. Because tissue-type plasminogen activator (tPA) might play a role in follicular rupture and because relaxin might increase tPA production, concentrations of tPA and relaxin in manipulated and control follicles were measured at different stages of development. Prepubertal gilts were treated with 1000 IU PMSG followed by 750 IU hCG at 72 hr later. Follicles on one ovary in each gilt were manipulated at laparotomy 48 hr after PMSG administration. Gilts were ovariectomized at 72, 90, 108, 114, 144, and 216 hr after PMSG. Concentrations of tPA and relaxin were determined for follicular fluid from follicles dissected free of ovarian stroma and snap frozen in liquid nitrogen and media from follicles cultured for 48 hr. Relaxin did not differ between treatment groups (manipulated and control) at any time (P > 0.05); whereas, tPA was greater in control follicles at 114 hr after PMSG than in manipulated follicles (P < 0.01). The effect of pyrilamine, a histamine-1 receptor antagonist, on tPA concentrations was determined in manipulated and control follicles collected at 3, 12, 24, 42, and 66 hr after manipulation. Concentrations of tPA were similar in control and manipulated follicles for gilts treated with pyrilamine, but again control follicles had greater (P < 0.05) tPA concentrations at 114 hr after PMSG. Thus, tPA seems to be involved in ovulation, and blockage of ovulation and subsequent cyst formation results from inadequate tPA activity in manipulated follicles.


Assuntos
Cistos Ovarianos/veterinária , Folículo Ovariano/metabolismo , Relaxina/metabolismo , Doenças dos Suínos/metabolismo , Suínos/fisiologia , Ativador de Plasminogênio Tecidual/metabolismo , Animais , Meios de Cultura , Ensaio de Imunoadsorção Enzimática/veterinária , Feminino , Líquido Folicular/química , Antagonistas dos Receptores Histamínicos H1/farmacologia , Laparotomia/veterinária , Cistos Ovarianos/metabolismo , Ovariectomia/veterinária , Pirilamina/farmacologia , Radioimunoensaio/veterinária , Distribuição Aleatória , Relaxina/análise , Ativador de Plasminogênio Tecidual/análise
20.
Ophthalmic Plast Reconstr Surg ; 14(3): 169-73, 1998 May.
Artigo em Inglês | MEDLINE | ID: mdl-9612806

RESUMO

Hodgkin disease with primary manifestation in the orbit is extremely rare, and even when suspected can be very difficult to diagnose. Its clinical and histological presentation can be nearly impossible to differentiate from that of a benign inflammatory process, and it is necessary to utilize immunohistochemical techniques to confirm the diagnosis. This article focuses on a case of nodular sclerosing Hodgkin disease with initial manifestation in the orbit. A comparison of the clinical, histological, and immunohistochemical presentations associated with both Hodgkin disease and benign inflammation is discussed. A brief review of the immunohistochemistry specific for Hodgkin disease is also provided.


Assuntos
Doença de Hodgkin/diagnóstico , Linfonodos/patologia , Neoplasias Orbitárias/diagnóstico , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Biomarcadores Tumorais/metabolismo , Biópsia , Bleomicina/uso terapêutico , Criança , Dacarbazina/uso terapêutico , Doxorrubicina/uso terapêutico , Doença de Hodgkin/metabolismo , Doença de Hodgkin/terapia , Humanos , Imuno-Histoquímica , Linfonodos/metabolismo , Masculino , Neoplasias Orbitárias/metabolismo , Neoplasias Orbitárias/terapia , Radioterapia Adjuvante , Células de Reed-Sternberg/patologia , Tomografia Computadorizada por Raios X , Vimblastina/uso terapêutico
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