Traumatic Chylothorax Following Pulmonary Segmentectomy: A Case Report and Review of Postoperative Investigation and Management.

The incidence of iatrogenic traumatic chylothorax is on the rise secondary to the preferred use of minimally invasive thoracic surgery over thoracotomy. Most reported causes of chylothorax occur following pneumonectomy or lobectomy. There have been no reported cases of traumatic chylothorax following segmentectomy according to our literature review. Complications following lung resection typically include pneumonia, atelectasis, or prolonged air leak. Here, we present a rare case of postoperative chylothorax following minimally invasive segmentectomy to diagnose an enlarging singular pulmonary nodule. This condition was diagnosed with fluid analysis after CT imaging revealed a postoperative unilateral pleural effusion. Interestingly, the patient had a loculated pleural effusion that mimicked a pericardial effusion and empyema. Our patient was managed conservatively with a low-fat diet and short-term pleural drainage without the need for repeat surgical intervention. The importance of imaging interpretation following lung resection along with a working differential diagnosis, appropriate examination, and testing can assist with the diagnosis of this known, but rare, postoperative complication.

Varenicline rescues nicotine-induced decrease in motivation for sucrose reinforcement.

Varenicline is one of the top medications used for smoking cessation and is often prescribed before termination of nicotine use. The effect of this combined nicotine and varenicline use on the reward system and motivation for primary reinforcement is underexplored. The goal of this study was to assess the effects of nicotine and varenicline on motivation for a food reinforcer. In Experiment 1, we first assessed the responding for sucrose after pretreatment with nicotine (0, 0.1, or 0.4 mg/kg) and varenicline (0.0, 0.1, 1.0 mg/kg) using a behavioral economics approach. The responding for sucrose was then assessed using a progressive ratio schedule of reinforcement after pretreatment with all possible combinations of nicotine and varenicline doses. In Experiment 2, rats were assessed for the consumption of sucrose in home cages after pretreatment with nicotine and varenicline. We found that (a) nicotine decreased economic demand for sucrose, (b) varenicline rescued nicotine-induced reduction in economic demand for sucrose, and (c) history of varenicline treatment predicted responding for sucrose on a progressive ratio schedule of reinforcement where rats with a history of varenicline treatment responded significantly lower for sucrose across nicotine doses than rats that had not been exposed to varenicline. The results of Experiment 2 largely confirmed that nicotine decreases motivation for sucrose using a passive consumption protocol and that varenicline rescues this effect. Overall, these findings suggest that varenicline interacts with the effects of nicotine by restoring nicotine-induced reduction in motivation for appetitive rewards.

Scheuermann's thoracic kyphosis in the adolescent patient.

Scheuermann's thoracic kyphosis is a condition characterized by increased posterior rounding of the thoracic spine in association with structural deformity of the vertebral elements. It is a structural deformity of the spine that is classically characterized by anterior wedging of 5° or more of 3 adjacent thoracic vertebral bodies with kyphosis measuring greater than 45° between T5 and T12. The cause of the deformity remains unknown but it is believed to be multifactorial, and it likely has a genetic component as well. Most adolescent patients seek orthopaedic evaluation for increased rounding and deformity of the thoracic spine that is occasionally associated with back pain. Parental concerns are also often related to the cosmetic deformity and the progressive nature of the condition. Bracing has been demonstrated to be an effective nonsurgical treatment modality for the skeletally immature child and/or adolescent with a progressive deformity. Operative management has been advocated for adolescents with progressive kyphosis measuring over 70°, for those who have had progression despite bracing, for patients with intractable back pain, and also for patients with unacceptable cosmetic deformity. Surgical options include posterior spinal arthrodesis with or without anterior spinal release via thoractomy or video-assisted thoracoscopic surgery (VATS). This article will review the diagnosis, pathophysiology, physical examination findings, and the nonoperative and surgical treatment options for adolescent patients with Scheuermann's kyphosis of the thoracic spine.

Intraoperative neuromonitoring in pediatric spinal deformity surgery.

Pediatric spinal deformity includes a broad range of disorders with differing causes, natural histories, and treatments. Spinal deformity surgery is performed to arrest the progression of and correct coronal and sagittal plane deformities including scoliosis and kyphosis. It is also undertaken to improve cosmesis and decrease the pain that can be associated with certain types of spinal deformity. Iatrogenic spinal cord injury remains the most feared complication of corrective spine surgery. Intraoperative neuromonitoring may be the single innovation that has had the greatest impact in lowering neurological complication rates over the last 2 decades. It is currently recommended in pediatric spinal deformity surgery whenever cord-level spinal instrumentation is planned and reliable signals can be anticipated. This article will briefly discuss common types of pediatric spinal deformity and corrective spine surgery. The use of intraoperative neuromonitoring in pediatric spine surgery will also be reviewed. As our abilities to correct more complex spinal deformities continue to improve, the importance of more advanced methods to decrease the risk of intraoperative neurological complications will also continue to increase.

Discoid lateral meniscus in children.

The discoid lateral meniscus is the most common abnormal meniscal variant in children. It affects the shape and mobility of the menisci, altering the normal mechanical relationships between the articulating surfaces of the knee and predisposing it to injury. The incidence of discoid lateral meniscus is estimated to be 1%-3% in the pediatric population and the condition is bilateral in 10%-20% of patients (Stanitski, 2002). An otherwise asymptomatic knee with an incidentally detected discoid meniscus does not require surgical intervention. However, a discoid lateral meniscus is much more likely to tear, and many children develop pain as well as mechanical symptoms (popping, snapping, locking, or giving way of the knee). Recent improvements in arthroscopic technique have led to greater attempts to stabilize, sculpt, and repair the torn discoid lateral meniscus. This article will review the classification, clinical presentation, diagnostic/imaging studies, and treatment options for a discoid lateral meniscus in children.

Developmental dysplasia of the hip: nursing implications and anticipatory guidance for parents.

Developmental dysplasia of the hip (DDH) is a comprehensive term used to describe an abnormal relationship between the femoral head and the acetabulum. Developmental dysplasia of the hip includes a very wide spectrum of abnormality from a frank dislocation (very unstable) to a stable hip with a slightly shallow acetabulum. As many of these findings may not be present at birth, the term developmental more accurately reflects the biologic features than does the term congenital. Despite the recent increased awareness of DDH and the importance of thorough screening programs, hip dysplasia continues to be a frequently missed diagnosis in pediatrics. Earlier detection and diagnosis of DDH is associated with a much more successful and less invasive outcome.