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1.
Plast Reconstr Surg ; 148(1): 28e-31e, 2021 Jul 01.
Artículo en Inglés | MEDLINE | ID: mdl-34181607

RESUMEN

SUMMARY: Prominent ears and other ear deformities are some of the most common congenital deformities of the head, affecting over 10 percent of the general population. In 2018, more than 10,000 otoplasties were performed in the United States, with over one-third performed on men. The goal of primary otoplasty is creation of a normal-appearing ear without evidence of surgical intervention. This article and video detail the authors' preferred technique for the treatment of prominent ears. This novel method allows for reduction of a hypertrophic concha and obtuse conchoscaphal angle, as well as creation of an adequate antihelical fold.


Asunto(s)
Oído Externo/anomalías , Procedimientos de Cirugía Plástica/métodos , Niño , Preescolar , Oído Externo/cirugía , Estética , Humanos , Técnicas de Sutura , Tiempo de Tratamiento , Resultado del Tratamiento
2.
Plast Reconstr Surg ; 143(3): 722-732, 2019 03.
Artículo en Inglés | MEDLINE | ID: mdl-30817642

RESUMEN

BACKGROUND: The umbilical float mini-abdominoplasty has been criticized for low final umbilicus position and umbilical distortion. The authors believe that in the properly selected patient and with proper technique, the umbilical float can achieve superior aesthetic results in a subset of patients. METHODS: A retrospective review was performed of all umbilical floats performed by two surgeons (B.A.H. and H.S.B.) at the authors' institution. Postoperative photographs were reviewed by 20 blinded evaluators. RESULTS: Thirty-one female patients underwent umbilical float mini-abdominoplasty between 2010 and 2017. All patients had starting umbilicus position at or above the level of the iliac crest. The umbilicus was floated for a distance of 1 to 3.5 cm. Average umbilicus position was slightly above the midpoint between the xiphoid and pubis preoperatively, and slightly below the midpoint postoperatively. Final umbilicus was considered "too low" in five patients (18.5 percent), all of which were positioned at the level of the anterior superior iliac spine. CONCLUSIONS: Optimal candidates for the umbilical float mini-abdominoplasty are postpartum women with normal body mass index, mild to moderate infraumbilical skin excess, and minimal to mild supraumbilical excess. Starting umbilicus position should be at or above the level of iliac crests, or slightly above the mid torso. Final umbilicus position should remain above the anterior superior iliac spine. The umbilical base is reattached with multiple sutures to prevent distortion. At least 10 cm of hairless lower abdominal skin should be maintained between the final scar and navel to prevent a low-appearing umbilicus. CLINICAL QUESTION/LEVEL OF EVIDENCE: Therapeutic, IV.


Asunto(s)
Abdominoplastia/métodos , Estética , Selección de Paciente , Ombligo/cirugía , Adulto , Anciano , Índice de Masa Corporal , Femenino , Humanos , Persona de Mediana Edad , Estudios Retrospectivos , Resultado del Tratamiento
3.
Plast Reconstr Surg ; 139(3): 681-691, 2017 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-28234847

RESUMEN

BACKGROUND: A single practice's treatment protocol and outcomes following molding therapy on newborn ear deformations and malformations with the EarWell Infant Ear Correction System were reviewed. A classification system for grading the severity of constricted ear malformations was created on the basis of anatomical findings. METHODS: A retrospective chart/photograph review of a consecutive series of infants treated with the EarWell System from 2011 to 2014 was undertaken. The infants were placed in either deformation or malformation groups. Three classes of malformation were identified. Data regarding treatment induction, duration of treatment, and quality of outcome were collected for all study patients. RESULTS: One hundred seventy-five infant ear malformations and 303 infant ear deformities were treated with the EarWell System. The average age at initiation of treatment was 12 days; the mean duration of treatment was 37 days. An average of six office visits was required. Treated malformations included constricted ears [172 ears (98 percent)] and cryptotia [three ears (2 percent)]. Cup ear (34 ears) was considered a constricted malformation, in contrast to the prominent ear deformity. Constricted ears were assigned to one of three classes, with each subsequent class indicating increasing severity: class I, 77 ears (45 percent); class II, 81 ears (47 percent); and class III, 14 ears (8 percent). Molding therapy with the EarWell System reduced the severity by an average of 1.2 points (p < 0.01). Complications included minor superficial excoriations and abrasions. CONCLUSION: The EarWell System was shown to be effective in eliminating or reducing the need for surgery in all but the most severe malformations. CLINICAL QUESTION/LEVEL OF EVIDENCE: Therapeutic, IV.


Asunto(s)
Oído Externo/anomalías , Procedimientos de Cirugía Plástica/instrumentación , Procedimientos de Cirugía Plástica/métodos , Anomalías Congénitas/clasificación , Anomalías Congénitas/cirugía , Humanos , Recién Nacido , Estudios Retrospectivos
4.
Domest Anim Endocrinol ; 53: 70-7, 2015 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-26143302

RESUMEN

Adiponectin is an important anti-inflammatory hormone secreted from adipose tissue. The high-molecular-weight form of adiponectin (HMW) closely correlates with insulin sensitivity in human beings. This study uses a novel method of size-exclusion gel chromatography combined with enzyme-linked immunosorbent assay to measure HMW feline adiponectin and determine its relationship to leptin, cholesterol, and insulin sensitivity as cats gain and lose weight. In addition, total adiponectin and its messenger RNA expression in subcutaneous adipose tissue were measured. No correlations were found between total serum adiponectin and subcutaneous adipose messenger RNA expression, fat mass, or measures of insulin sensitivity. This study demonstrates that cats have high percentages of HMW adiponectin. Although weak correlations between HMW adiponectin and fat mass were detected, additional cats are needed to determine if the correlations are significant.


Asunto(s)
Adiponectina/metabolismo , Gatos/fisiología , Sobrepeso/veterinaria , Pérdida de Peso/fisiología , Adiponectina/sangre , Animales , Composición Corporal , Femenino , Masculino , Sobrepeso/sangre , Sobrepeso/metabolismo
5.
Pediatr Obes ; 8(6): 445-53, 2013 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-23325553

RESUMEN

WHAT IS ALREADY KNOWN ABOUT THIS SUBJECT: Youth with ADHD may be at increased risk for obesity. Medications used to treat ADHD can affect weight. Few studies have investigated possible gender differences in associations between ADHD and obesity. WHAT THIS STUDY ADDS: Nationally representative of US youth aged 8-15 years. Height and weight were measured, and ADHD assessed by structured diagnostic interview and parent report. Associations between ADHD and obesity are reported for males and females to enable gender comparisons. OBJECTIVE: To investigate how associations between attention-deficit/hyperactivity disorder (ADHD) and obesity differ by gender and medication use in a nationally representative sample of US youth in which height and weight were measured. METHODS: Youth age 8-15 (n = 3050) studied in the National Health and Nutrition Examination Survey 2001-2004. Obesity was defined as ≥95th percentile of US body mass index-for-age reference. ADHD was determined by asking parents if child had been diagnosed and using the Diagnostic Interview Schedule for Children IV. Gender-stratified multivariable logistic regression was used to estimate odds of obesity for youth with ADHD (medicated and unmedicated) relative to youth without ADHD. RESULTS: Males with ADHD who were medicated had lower odds of obesity compared to males without ADHD (adjusted odds ratio [OR] = 0.42, 95% confidence interval [CI] = 0.23-0.78). Unmedicated males with ADHD were as likely as males without ADHD to be obese (adjusted OR = 1.02, 95% CI = 0.43-2.42). The odds of obesity for females taking medication for ADHD did not differ statistically from those of females without ADHD (adjusted OR = 1.21, 95% CI = 0.52-2.81). Females with ADHD not taking medication had odds of obesity 1.54 times those of females without ADHD; however, the 95% CI (0.79-2.98) was wide and not statistically significant at α = 0.05. CONCLUSIONS: Associations between ADHD and obesity are influenced by treatment of ADHD with medication and may differ by gender. Youth with ADHD who are not treated with medication are as or more likely than youth without ADHD to be obese.


Asunto(s)
Trastorno por Déficit de Atención con Hiperactividad/complicaciones , Estimulantes del Sistema Nervioso Central/uso terapéutico , Obesidad/etiología , Adolescente , Trastorno por Déficit de Atención con Hiperactividad/tratamiento farmacológico , Trastorno por Déficit de Atención con Hiperactividad/epidemiología , Índice de Masa Corporal , Niño , Estudios Transversales , Femenino , Humanos , Masculino , Encuestas Nutricionales , Obesidad/tratamiento farmacológico , Obesidad/epidemiología , Oportunidad Relativa , Prevalencia , Factores de Riesgo , Estados Unidos/epidemiología
6.
Plast Reconstr Surg ; 130(3): 690-699, 2012 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-22929253

RESUMEN

BACKGROUND: The senior author's (H.S.B.) endoscopic brow and midface lift technique has a series of periorbital suture points. This study evaluated the efficacy of endoscopic treatment of the difficult lower eyelid and identifies the preoperative predictive patterns for additional suture placement and ancillary procedures within this population. METHODS: Patients who underwent endoscopic brow and midface lift performed by the senior author were stratified into categories of preoperative lower eyelid morphologies, including lower eyelid retraction, negative canthal tilt, negative vector orbit, exorbitism, and a deep tear trough. Intraoperative treatment and postoperative course were recorded and postoperative photographs were evaluated objectively. The data were analyzed to determine preoperative predictive patterns of endoscopic lower eyelid treatment. RESULTS: Three hundred patients who underwent an endoscopic brow and midface lift between 1999 and 2008 were included in the study, with an average follow-up of 1 year. Most patients were treated with endoscopic orbicularis oculi repositioning combined with midface elevation. Additional suture points were used in 12 percent, with preexisting scleral show being the most common indication for additional endoscopic suture placement. There were no cases of postoperative lower eyelid retraction. Skin resurfacing and volumetric filling were the most common revision procedures. CONCLUSIONS: The difficult lower eyelid can be treated effectively with endoscopic orbicularis repositioning and midface elevation. This technique preserves the innervation and continuity of the orbicularis oculi muscle, decreasing postoperative complications. Additional suture application is needed in only a minority of patients, and ancillary lower eyelid procedures can be performed safely in the same operative setting.


Asunto(s)
Blefaroplastia/métodos , Endoscopía/métodos , Párpados/cirugía , Adulto , Anciano , Femenino , Estudios de Seguimiento , Humanos , Masculino , Persona de Mediana Edad , Regeneración de la Piel con Plasma , Estudios Retrospectivos , Técnicas de Sutura , Resultado del Tratamiento
7.
Plast Reconstr Surg ; 126(4): 1191-1200, 2010 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-20453717

RESUMEN

BACKGROUND: A review of a single physician's experience in managing over 831 infant ear deformities (488 patients) is presented. METHODS: The authors' methods of molding have advanced from the use of various tapes, glues, and stents, to a comprehensive yet simple system that shapes the antihelix, the triangular fossa, the helical rim, and the overly prominent conchal-mastoid angle (EarWell Infant Ear Correction System). RESULTS: The types of deformities managed, and their relative occurrence, are as follows: (1) prominent/cup ear, 373 ears (45 percent); (2) lidding/lop ear, 224 ears (27 percent); (3) mixed ear deformities, 83 ears (10 percent) (all had associated conchal crus); (4) Stahl's ear, 66 ears (8 percent); (5) helical rim abnormalities, 58 ears (7 percent); (6) conchal crus, 25 ears (3 percent); and (7) cryptotia, two ears (0.2 percent). Bilateral deformities were present in 340 patients (70 percent), with unilateral deformities in 148 patients (30 percent). Fifty-eight infant ears (34 patients) were treated using the final version of the EarWell Infant Ear Correction System with a success rate exceeding 90 percent (good to excellent results). The system was found to be most successful when begun in the first week of the infant's life. When molding was initiated after 3 weeks from birth, only approximately half of the infants had a good response. CONCLUSIONS: Congenital ear deformities are common and only approximately 30 percent self-correct. These deformities can be corrected by initiating appropriate molding in the first week of life. Neonatal molding reduces the need for surgical correction with results that often exceed what can be achieved with the surgical alternative.


Asunto(s)
Anomalías Congénitas/terapia , Técnicas Cosméticas , Pabellón Auricular/anomalías , Dispositivos de Fijación Quirúrgicos , Adhesivos , Estudios de Cohortes , Oído Externo/anomalías , Estética , Femenino , Humanos , Recién Nacido , Masculino , Procedimientos de Cirugía Plástica/métodos , Estudios Retrospectivos , Férulas (Fijadores) , Stents , Cinta Quirúrgica , Resultado del Tratamiento
8.
Plast Reconstr Surg ; 123(4): 1364-1377, 2009 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-19337105

RESUMEN

Of all the methods for repair of the unilateral cleft lip, none has gained as much popularity as the rotation-advancement. Millard's original principle of 50 years ago continues to guide surgeons in closure of the cleft lip. Unlike earlier procedures, the brilliance of the rotation-advancement is that it permits individual manipulation and modifications while maintaining Millard's original surgical and anatomical goals. Millard and many other surgeons have made modifications to adjust the procedure to each specific patient, to address some of its faults, and to gain new advantages. In this article, the authors review the techniques of Drs. Ralph Millard, Steve Byrd, Court Cutting, John Mulliken, and Samuel Stal. The variations from Millard's original technique are highlighted, including a discussion of the benefits of each modification.


Asunto(s)
Labio Leporino/cirugía , Procedimientos de Cirugía Plástica/métodos , Preescolar , Humanos , Lactante , Cuidados Preoperatorios , Colgajos Quirúrgicos , Factores de Tiempo
9.
Semin Plast Surg ; 23(4): 274-82, 2009 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-21037863

RESUMEN

The endoscopic midface lift procedure has evolved from experience with postreduction soft tissue repair after facial fracture fixation. The procedure elevates and repositions midface soft tissue, which descends with facial aging; as well, it can correct periorbital congenital abnormalities, such as exorbitism and lateral canthal displacement. The procedure has been refined by the senior author to employ a temporal endoscopic approach alleviating the need for a lower eyelid incision. The plane is sub-SMAS (superficial muscular aponeurotic system) within the pre-zygomatic space with release of the zygo-orbicular ligament and the malar retaining ligament. Using an endoscopically placed suture in the malar retaining ligament, the midface and orbicularis oculi are elevated en bloc, with additional selective sutures applied for specific lower eyelid and cheek morphology. Ancillary lower eyelid procedures including skin resurfacing, skin excision, soft tissue augmentation, and a transblepharoplasty septal reset can all be safely applied to the lower eyelid in the same operative setting. All procedures are technically advanced though once executed deliver an exact correction of the midface, which can be combined with both brow and lower face rejuvenation. The procedure offers limited recovery time and few complications as the facial surgeon becomes facile with the technique.

10.
Plast Reconstr Surg ; 122(4): 1181-1190, 2008 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-18827654

RESUMEN

SUMMARY: The bilateral cleft lip and nasal repair has remained a challenging endeavor. Techniques have evolved to address concerns over unsatisfactory features and stigmata of the surgery. The authors present an approach to this complex clinical problem that modifies traditional repairs described by Millard and Manchester. The senior author (H.S.B.) has developed this technique with over 25 years of surgical experience dealing with the bilateral cleft lip. This staged lip and nasal repair provides excellent nasal projection, lip function, and aesthetic outcomes. Lip repair is performed at 3 months of age. Columellar lengthening is performed at approximately 18 months of age. A key component of this repair focuses on reconstruction of the central tubercle. A triangular prolabial dry vermilion flap is augmented by lateral lip vermilion flaps that include the profundus muscle of the orbicularis oris. This minimizes lateral lip segment sacrifice and provides improved central vermilion fullness, which is often deficient in traditional repairs. The authors present the surgical technique and examples of their clinical results.


Asunto(s)
Labio Leporino/cirugía , Fisura del Paladar/cirugía , Nariz/anomalías , Nariz/cirugía , Niño , Preescolar , Femenino , Humanos , Masculino , Procedimientos de Cirugía Plástica
11.
Pharmazie ; 63(1): 81-5, 2008 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-18271310

RESUMEN

The clinical significance of a proper eye drop application technique was evaluated in Japanese glaucoma patients. Patients diagnosed with primary open-angle glaucoma having intraocular pressure (IOP) greater than 21 mmHg were treated with eye drops at home. In some patients, however, the topical treatment was ineffective. They returned to the hospital to receive surgical treatment. On admission, 56% of these patients had IOP greater than 21 mmHg. Patient instillation technique was evaluated based on the proximity of the eyedropper tip to the eyes, application position, eyelid closure, treatment (removal) of excess fluid, and nasolacrimal occlusion. In addition, pharmacists interviewed patients to determine the level of understanding of glaucoma, knowledge of prescribed drugs, home application technique, and sensation after application. Multivariate analysis revealed that the key factors influencing the control of IOP to less than 21 mmHg with topical medication were: application of drops in the center of the eye and removal of excessive fluid, in addition to gender and age. Proper topical application at home was dependent on the patient's understanding of the disease, knowledge of prescribed drugs, patient education on the use of drugs, the competence of the instructor, and knowledge of correct application technique. This study indicates that easily comprehensible patient education on the use of eye drops, the nature of glaucoma and the proper use of prescribed drugs is vital to improving the clinical efficacy of topical ophthalmic medication of glaucoma in adult patients.


Asunto(s)
Glaucoma/tratamiento farmacológico , Soluciones Oftálmicas/administración & dosificación , Soluciones Oftálmicas/uso terapéutico , Administración Tópica , Adulto , Anciano , Femenino , Glaucoma/diagnóstico , Humanos , Presión Intraocular , Masculino , Persona de Mediana Edad , Análisis Multivariante , Soluciones Oftálmicas/efectos adversos , Farmacéuticos
12.
Plast Reconstr Surg ; 120(5): 1348-1356, 2007 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-17898611

RESUMEN

The majority of patients with a unilateral cleft nasal deformity still benefit from additional nasal surgery in their teenage years, despite having undergone a primary nasal repair. However, the secondary nasal deformity of these patients stands in sharp contrast to those of children who have not benefited from primary repair. The authors' algorithm for the definitive correction of these secondary deformities considers the differences in these two patient groups and defines their indications for rib cartilage grafts and their method of using septal and ear cartilage in the repair. Balancing the muscle forces on the septum and alar cartilage is emphasized in both the primary and secondary repair. Both cartilage malposition and hypoplasia of the lower lateral cartilage complex have been identified as factors contributing to the deformity.


Asunto(s)
Algoritmos , Labio Leporino/cirugía , Nariz/cirugía , Rinoplastia , Cartílago/trasplante , Humanos , Maxilar/cirugía , Rinoplastia/métodos , Costillas/trasplante
13.
Plast Reconstr Surg ; 119(6): 1897-1902, 2007 May.
Artículo en Inglés | MEDLINE | ID: mdl-17440372

RESUMEN

BACKGROUND: When performing dorsal reduction in primary rhinoplasty, one must pay close attention to the height of the upper lateral cartilages. They are in part responsible for the dorsal aesthetic lines and often require a lower profile. METHODS: The technique the authors describe uses the transverse portion of the upper lateral cartilages rotated medially to function as a local spreader flap while reducing the profile of the dorsum and preserving the aesthetic lines. This is a surgical technique that adjusts the height of the upper lateral cartilages in a precise and safe manner while preserving the function of the internal valve. RESULTS: The authors present two patients seen at 1 and 3 years after undergoing the autospreader flap technique. In the experience of the senior author (H.S.B.) with this procedure over the past decade, preoperative surgical goals were achieved reliably. CONCLUSIONS: The authors review the anatomical indications in which they found this technique to be simple, reproducible, and effective in shaping the dorsal midvault while preserving the function of the internal valve. Autospreader flap rotation should be considered when dorsal reduction is required.


Asunto(s)
Cartílago/trasplante , Estética , Rinoplastia/métodos , Cartílago/cirugía , Femenino , Estudios de Seguimiento , Humanos , Tabique Nasal/cirugía , Expansión de Tejido/métodos
14.
Am J Pharm Educ ; 71(1): 17, 2007 Feb 15.
Artículo en Inglés | MEDLINE | ID: mdl-17429517

RESUMEN

OBJECTIVES: To evaluate the effectiveness of a problem-based learning (PBL) model implemented in 1995 at the University of Mississippi School of Pharmacy. DESIGN: The third-professional (P3) year curriculum was reoriented from a faculty-centered model of teaching to a student-centered model of learning. Didactic lectures and structured classroom time were diminished. Small student groups were organized and a faculty facilitator monitored each group's discussions and provided individual student assessments. At the end of each 8-week block, students were assessed on group participation, disease and drug content knowledge, and problem-solving abilities. Faculty and student input was solicited at the end of each year to aid programmatic improvement. In 2000, a formal 5-year review of the PBL program was conducted. ASSESSMENT: Recommendations for improvement included clarifying course objectives, adopting a peer-review process for examination materials, refining the group assessment instruments, and providing an opportunity for student remediation after a course was failed. A weekly case conference presided over by a faculty content expert was also recommended. Ongoing critical evaluation during the following 5-year period was provided by graduates of the program, faculty participants, and accreditation reviews. CONCLUSION: Over our 10-year experience with a PBL model of P3 education, we found that although the initial challenges of increased demands on personnel and teaching space were easily overcome, student acceptance of the program depended on their acknowledgment of the practical benefits of active learning and on the value afforded their input on curricular development.


Asunto(s)
Evaluación Educacional/métodos , Modelos Educacionales , Aprendizaje Basado en Problemas/métodos , Curriculum/tendencias , Educación en Farmacia/métodos , Educación en Farmacia/tendencias , Humanos , Aprendizaje Basado en Problemas/tendencias , Estudiantes de Farmacia , Enseñanza/métodos , Enseñanza/tendencias
15.
Anal Bioanal Chem ; 387(6): 1983-90, 2007 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-17093959

RESUMEN

A sensitive semi-micro column HPLC method with peroxyoxalate chemiluminescence (POCL) detection and column switching has been developed for simultaneous determination of 3,4-methylenedioxymethamphetamine (MDMA) and related compounds, for example 3,4-methylenedioxyamphetamine, methamphetamine, and amphetamine, in hair. After digestion of the hair with 1 mol L-1 sodium hydroxide the compounds were extracted with n-heptane and derivatized with 4-(N,N-dimethylaminosulfonyl)-7-fluoro-2,1,3-benzoxadiazole. A mixture of hydrogen peroxide and bis(2,4,5-trichloro-6-carbopentoxyphenyl)oxalate in acetonitrile was used as post-column CL reagent. Calibration plots showed linearity was good (r=0.999); detection limits were 0.02-0.16 ng mg-1 hair at a signal-to-noise ratio of 3. The precision of the method, as RSD (n=5), in intra-day and inter-day assays was better than 5.0 and 6.9%, respectively. The proposed method was sufficiently sensitive to detect low ng mg-1 levels of MDMA and related compounds in hair, and could be used for quantification of the compounds in hair samples from patients treated in a chemical dependency unit.


Asunto(s)
Cromatografía Líquida de Alta Presión/instrumentación , Cromatografía Líquida de Alta Presión/métodos , Cabello , Mediciones Luminiscentes/instrumentación , Mediciones Luminiscentes/métodos , N-Metil-3,4-metilenodioxianfetamina/análisis , Oxalatos/análisis , Calibración , Cabello/química , Humanos , Estructura Molecular , N-Metil-3,4-metilenodioxianfetamina/química , Oxalatos/química , Sensibilidad y Especificidad
16.
J Am Chem Soc ; 126(11): 3472-6, 2004 Mar 24.
Artículo en Inglés | MEDLINE | ID: mdl-15025474

RESUMEN

A versatile methodology to prepare hybrid biomaterials by atom transfer radical polymerization from resin-supported peptides has been established. As an example, we have synthesized a GRGDS-functionalized poly(2-hydroxyethyl methacrylate). The peptide-polymer was characterized by solid-state (13)C NMR and GPC and found to have a number average molecular weight of 4420 and a polydispersity of 1.47. These values are comparable to those obtained from solution-phase syntheses, suggesting the ATRP reaction is successful from a peptide-conjugated solid support. Solid-state (13)C NMR was used to characterize multiple steps in the reaction, and the synthesis was found to be near quantitative. We have performed cell adhesion experiments and observed the GRGDS sequence-promoted cell adhesion, whereas unfunctionalized poly(2-hydroxyethyl methacrylate) did not. By incorporating cell-signaling moieties in materials with defined molecular architecture, it will be possible to control the interactions between polymeric materials and biological systems.


Asunto(s)
Oligopéptidos/síntesis química , Poliaminas/síntesis química , Polihidroxietil Metacrilato/análogos & derivados , Polihidroxietil Metacrilato/síntesis química , Animales , Adhesión Celular , Hidrogeles/síntesis química , Hidrogeles/química , Ratones , Células 3T3 NIH , Resonancia Magnética Nuclear Biomolecular , Oligopéptidos/química , Poliaminas/química , Polihidroxietil Metacrilato/química , Resinas Sintéticas/química
18.
Plast Reconstr Surg ; 112(2): 636-41; discussion 642-6, 2003 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-12900627

RESUMEN

Advances in medicine have improved the delivery of health care, making it more technologically superior than ever and, at the same time, more complex. Nowhere is this more evident than in the surgical arena. Plastic surgeons are able to perform procedures safely in office-based facilities that were once reserved only for hospital operating rooms or ambulatory surgery centers. Performing procedures in the office is a convenience to both the surgeon and the patient. Some groups have challenged that performing plastic surgery procedures in an office-based facility compromises patient safety. Our study was done to determine whether outcomes are adversely affected by performing plastic surgery procedures in an accredited outpatient surgical center. A retrospective review was performed on 5316 consecutive cases completed between 1995 and 2000 at Dallas Day Surgical Center, Dallas, Texas, an outpatient surgical facility. Most cases were cosmetic procedures. All cases were analyzed for any potential morbidity or mortality. Complications requiring a return to the operating room were determined, as were infection rates. Events leading to inpatient hospitalization were also included. During this 6-year period, 35 complications (0.7 percent) and no deaths were reported. Most complications were secondary to hematoma formation (77 percent). The postoperative infection rate for patients requiring a return to the operating room was 0.11 percent. Seven patients required inpatient hospitalization following their procedure secondary to arrhythmias, angina, and pulmonary emboli. Patient safety must take precedence over cost and convenience. Any monetary savings or time gained is quickly lost if safety is compromised and complications are incurred. The safety profile of the outpatient facility must meet and even exceed that of the traditional hospital-based or ambulatory care facility. After reviewing our experience over the last 6 years that indicated few complications and no deaths, we continue to support the judicious use of accredited outpatient surgical facilities by board-certified plastic surgeons in the management of plastic surgery patients.


Asunto(s)
Procedimientos Quirúrgicos Ambulatorios , Complicaciones Posoperatorias , Cirugía Plástica , Hospitalización , Humanos , Reoperación , Estudios Retrospectivos
19.
J Am Soc Mass Spectrom ; 14(1): 51-7, 2003 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-12504333

RESUMEN

The present study demonstrates the feasibility of the eta5-cyclopentadienylcobalt ion (CpCo*+) as a suitable cationization reagent for saturated hydrocarbon analysis by mass spectrometry. Ion/molecule reactions of CpCo*+ and three medium chain-length n-alkanes were examined using Fourier-transform ion cyclotron resonance mass spectrometry. Second-order rate constants and reaction efficiencies were determined for the reactions studied. Loss of two hydrogen molecules from the CpCo-alkane ion complex was found to dominate all reactions ( > or = 80%). Furthermore, this dehydrogenation reaction efficiency increases with increasing chain length. These preliminary results suggest that the CpCo*+ ion may be a promising cationization reagent of longer chain saturated hydrocarbons and polyolefins.

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