Mark D. Twite

Sedation, analgesia, and neuromuscular blockade in the pediatric intensive care unit: survey of fellowship training programs.

Objective: To survey current sedation, analgesia, and neuromuscular blockade practices in pediatric critical care fellowship training programs in the United States. Design: Questionnaire survey sent by E-mail to all program directors. The survey could be submitted either via a Web site, fax, or mail. Setting: University school of medicine. Subjects: Fifty-nine pediatric critical care fellowship training program directors in the United States, listed on the Accreditation Council for Graduate Medical Education Web site. Interventions: Survey. Measurements and Main Results: The response rate was 59.3% (35 questionnaires). Midazolam, lorazepam, morphine, and fentanyl are the most frequently used drugs in pediatric intensive care units for analgesia and sedation. Most pediatric intensive care units surveyed have a written sedation policy (66%). The majority of units responding to the survey (85.7%) routinely use a scoring system to assess agitation and pain in children, with the most common being the COMFORT score. All of the pediatric intensive care units surveyed reported weaning drugs slowly to try to prevent drug withdrawal. Movement disorders related to prolonged sedation and analgesia seem to be more common than is reported in the literature, with 65.7% of units reporting cases. There is good consensus on the indications for neuromuscular blockade, with vecuronium being the most popular drug. Conclusions: When compared with a similar survey from 1989, this survey suggests that pediatric critical care units with fellowship training programs have made some changes in their approach to sedation and analgesia over the past decade. More fellowship directors report the use of sedation protocols and better recognition, prevention, and management of drug withdrawal. Similar analgesic, sedative, and neuromuscular blocking drugs are being used but some more commonly than a decade ago.

A Handoff Protocol from the Cardiovascular Operating Room to Cardiac ICU Is Associated with Improvements in Care Beyond the Immediate Postoperative Period

BACKGROUNDnHandoff protocols from the cardiovascular operating room (CVOR) to the cardiac intensive care unit (CICU) can improve patient outcomes and delivery of care beyond the immediate postoperative period. In a prospective quality improvement study, a structured CVOR-to-CICU handoff protocol was implemented at a university-affiliated childrens hospital. As a parallel project, an initiative to reduce unplanned extubations in the CICU was implemented.nnnMETHODSnIn a 41-month period, 1,507 neonates, infants, children, and adults were admitted to the CICU from the CVOR after undergoing a surgical procedure. The study was divided into a 17-month prehandoff-protocol period (January 2009-May 2010) and a 24-month posthandoff-protocol period (June 2010-May 2012). The handoff protocol was intended to streamline the handoff process from the CVOR and throughout the transition to the CICU. The specifics of the handoff, as outlined in a bedside laminated flowchart, included patient transport from the CVOR, the cardiovascular surgeons report, the anesthesiologists report, and the patient status summary and care plan.nnnRESULTSnAfter introduction of the handoff protocol, there was a statistically significant and sustained reduction in the mean rate of unplanned extubations from 0.62 to 0.24 per 100 ventilator-days (p = .03). There was a statistically significant reduction in median ventilator time per patient--from 17 hours (interquartile range [IQR]: 5.3 to 57.7) to 12.8 hours (IQR: 4.8 to 31.8); p = .02). The mean rate of unplanned extubations was 0.26 in 2011 and 0.30 in 2012.nnnCONCLUSIONSnImplementation of a handoff protocol from the CVOR to the CICU was associated with sustained decrease in unplanned extubations and in mean ventilator times.

The Hemodynamic Response to Dexmedetomidine Loading Dose in Children With and Without Pulmonary Hypertension

BACKGROUND:Dexmedetomidine, an &agr;-2 receptor agonist, is widely used in children with cardiac disease. Significant hemodynamic responses, including systemic and pulmonary vasoconstriction, have been reported after dexmedetomidine administration. Our primary goal of this prospective, observational study was to quantify the effects of dexmedetomidine initial loading doses on mean pulmonary artery pressure (PAP) in children with and without pulmonary hypertension. METHODS:Subjects were children undergoing cardiac catheterization for either routine surveillance after cardiac transplantation (n = 21) or pulmonary hypertension studies (n = 21). After anesthetic induction with sevoflurane and tracheal intubation, sevoflurane was discontinued and anesthesia was maintained with midazolam 0.1 mg/kg IV (or 0.5 mg/kg orally preoperatively) and remifentanil IV infusion 0.5 to 0.8 &mgr;g/kg/min. Ventilation was mechanically controlled to maintain PCO2 35 to 40 mm Hg. When end-tidal sevoflurane was 0% and fraction of inspired oxygen (FIO2) was 0.21, baseline heart rate, mean arterial blood pressure, PAP, right atrial pressure, pulmonary artery occlusion pressure, right ventricular end-diastolic pressure, cardiac output, and arterial blood gases were measured, and indexed systemic vascular resistance, indexed pulmonary vascular resistance, and cardiac index were calculated. Each subject then received a 10-minute infusion of dexmedetomidine of 1 &mgr;g/kg, 0.75 &mgr;g/kg, or 0.5 &mgr;g/kg. Measurements and calculations were repeated at the conclusion of the infusion. RESULTS:Most hemodynamic responses were similar in children with and without pulmonary hypertension. Heart rate decreased significantly, and mean arterial blood pressure and indexed systemic vascular resistance increased significantly. Cardiac index did not change. A small, statistically significant increase in PAP was observed in transplant patients but not in subjects with pulmonary hypertension. Changes in indexed pulmonary vascular resistance were not significant. CONCLUSION:Dexmedetomidine initial loading doses were associated with significant systemic vasoconstriction and hypertension, but a similar response was not observed in the pulmonary vasculature, even in children with pulmonary hypertension. Dexmedetomidine does not appear to be contraindicated in children with pulmonary hypertension.

Hypnotic Depth and the Incidence of Emergence Agitation and Negative Postoperative Behavioral Changes

Background:u2002 Emergence agitation (EA) and negative postoperative behavioral changes (NPOBC) are common in children, although the etiology remains unclear. We investigated whether longer times under deep hypnosis as measured by Bispectral Index™ (BIS) monitoring would positively correlate with a greater incidence of EA in the PACU and a greater occurrence of NPOBC in children after discharge.

Pediatric sedation outside the operating room: the year in review.

Purpose of review This review is a survey of the recent literature concerning issues and trends in the rapidly changing field of pediatric sedation. Recent findings Clinical guidelines for the safe provision of sedation to children continue to be developed and revised. Systems for providing sedation are evolving, and the most successful models emerging are those that involve a dedicated team, either mobile or stationary, of physicians and nurses. A variety of drugs is used, and potent drugs that were designed as anesthetics, such as propofol and ketamine, are being administered outside the operating room by anesthesiologists and non-anesthesiologists. The safety of this practice continues to be debated. The reported incidence of adverse events is different in various settings and systems; however, outcome data are difficult to compare because of differences in study design and outcome definition. There is agreement that sedation is a continuum, and evidence that the depth of sedation attained during procedural sedation in children is often consistent with general anesthesia. Capnography and processed electroencephalogram monitoring have been described in sedation studies, may enhance safety during pediatric sedation, and should be investigated further. Summary The evolution of systems, drugs, and monitors for the provision of pediatric sedation is continuing. An accurate assessment of safety and other outcomes will be enhanced through the establishment of multicenter collaborative databases.

Tetralogy of Fallot: Perioperative Anesthetic Management of Children and Adults

Tetralogy of Fallot (TOF) is a common congenital heart defect in children. Perioperative considerations include preoperative preparation for surgery, intraoperative anesthetic management, and common postoperative issues in the intensive care unit. Surgical debates have shifted away from 2-stage versus single-stage repairs to debates of how surgery to limit pulmonary insufficiency (PI) may have significant long-term impact as the child grows. There are many adult survivors of TOF repair in infancy who now present with a unique set of problems related to PI and right ventricular dysfunction. These adults provide new insights into congenital heart disease (CHD) and how management strategies early in life may have significant implications much later in life. Patients with complex CHD should have lifelong follow-up, so our knowledge will continue to improve, and the best possible care can be provided for these patients.

Retrospective analysis of eliminating modified ultrafiltration after pediatric cardiopulmonary bypass

Modified ultrafiltration (MUF) is a technique which is commonly used immediately post-cardiopulmonary bypass (CPB) for open heart surgery in children. There are many advantages of MUF, but there are also a number of less reported disadvantages. At our institution, after considering all of the available data, a decision was made to no longer perform MUF. The primary motivation being the simplified and miniaturized CPB circuit would reduce hemodilution, decrease our likelihood of reaching our transfusion trigger during CPB and, potentially, improve safety. This study reports the before and after data from this practice change. A total of 160 patients less than 8kg were studied over 38 months and divided into neonatal and pediatric cohorts. Parameters reported in this study include: demographics, hematocrit, blood product transfusion, hemostasis, hemodynamics and outcomes. Although retrospective, our analysis supports an advantage of preventing hemodilution (via circuit miniaturization) versus reversing hemodilution (via MUF) at our institution with the patient population we examined.

A case of childhood peripheral T-cell lymphoma with massive cardiac infiltration.

ALK-negative CD30-negative peripheral T-cell lymphoma (PTCL) is an exceedingly rare neoplasm in children. Equally rare is the finding of cardiac involvement from lymphoma at presentation. The authors present a pediatric patient with PTCL involving the heart. The patient had orthopnea and an abnormal echocardiogram on presentation. After three doses of radiation, he died, and the autopsy showed massive infiltration of the heart and cardiac vessels by tumor. The authors review briefly the biology of PTCL and the incidence of cardiac involvement with lymphoma, which is not often appreciated prior to death.

Is there a "right" way to wean my patient from the ventilator? A critical appraisal of Randolph et al: Effect of mechanical ventilator weaning protocols on respiratory outcomes in infants and children: A randomized controlled trial (JAMA 2002; 288:2561-2568).

Objective: To review the findings and discuss the implications of mechanical ventilator weaning protocols in children. Design: A critical appraisal of Randolph et al. Effect of mechanical ventilator weaning protocols on respiratory outcomes in infants and children: A randomized controlled trial. JAMA 2002;288:2561–2568, and literature review. Findings: There was no difference in ventilator weaning times between children randomized to a ventilator weaning protocol (pressure support, volume support, or no protocol). However, the study did show that increased sedative use during the first 24 hrs of weaning (the only time during which these data were collected) was an important predictor of weaning duration (p < .001) and weaning failure (p = .04). Conclusions: The majority of children are weaned from mechanical ventilation over a short period of time. Weaning protocols may not shorten this brief duration of weaning but may have other advantages such as improved collaboration between healthcare team members. Future research into the effects of sedation on weaning from mechanical ventilation is needed in children.

Consensus Statement by the Congenital Cardiac Anesthesia Society: Milestones for the Pediatric Cardiac Anesthesia Fellowship

Pediatric cardiac anesthesiology has evolved as a subspecialty of both pediatric and cardiac anesthesiology and is devoted to caring for individuals with congenital heart disease ranging in age from neonates to adults. Training in pediatric cardiac anesthesia is a second-year fellowship with variability in both training duration and content and is not accredited by the Accreditation Council on Graduate Medical Education. Consequently, in this article and based on the Accreditation Council on Graduate Medical Education Milestones Model, an expert panel of the Congenital Cardiac Anesthesia Society, a section of the Society of Pediatric Anesthesiology, defines 18 milestones as competency-based developmental outcomes for training in the pediatric cardiac anesthesia fellowship.