Teaching NICU Fellows How to Relay Difficult News Using a Simulation-Based Curriculum: Does Comfort Lead to Competence?

PROBLEM: Neonatal Intensive Care Unit (NICU) clinicians must frequently relay difficult news to patient families, and the need for formal training for NICU trainees to develop this skill has been established. Although previous studies have shown improved trainee self-efficacy and comfort in handling difficult conversations after formal communication training, it remains unclear whether these interventions lead to improved objectively assessed short-term and long-term performance. INTERVENTION: A simulation-based intervention emphasizing the SPIKES protocol for delivery of bad news was implemented for 15 fellows in the 3-year Baylor College of Medicine Neonatal-Perinatal Medicine fellowship program in the 2013-2014 academic year. Simulations involved video-recorded encounters between each fellow and a standardized parent (SP) involving communication of difficult news. Each fellow was evaluated before (preintervention), immediately after (postintervention), and 3-4 months after the intervention (follow-up) with an (a) evaluation of video-recorded sessions by two expert raters blinded to the timing of the encounter (blinded rater evaluation [BRE]), (b) Self-Assessment Questionnaire, (c) Content Test evaluating knowledge of taught concepts, and (d) SP evaluation (SPE). CONTEXT: The 1st- and 2nd/3rd-year fellows participated in the study at separate times in the academic year to accommodate their schedules. First-year fellows had had more prior communication training and less NICU clinical experience than the 2nd/3rd-year fellows at the time of their intervention. OUTCOME: Although all fellows displayed improved Self-Assessment and Content Test scores at postintervention with retention at the follow-up assessment, the BREs showed no statistically significant improvement in postintervention scores and showed a decline in follow-up scores. First-year fellows had higher BRE postintervention scores than the senior fellows. SPEs showed no difference in scores at all 3 assessment stages. LESSONS LEARNED: As previously described in the literature, trainee self-efficacy and knowledge may improve in the short term and long term with a simulation-based curriculum in communication of difficult news. However, these results may be inconsistent with those of objective evaluations by expert raters and standardized parents. The impact of the curriculum may be heightened if it reinforces previously learned skills, but the effect may wane over time if not reinforced frequently with additional formal training or in the clinical setting. The results of this study highlight the importance of objective assessments in evaluating the utility of a simulation-based communication curriculum and the need for longitudinal curricula to promote retention of the concepts and skills being taught.

Delayed initiation but not gradual advancement of enteral formula feeding reduces the incidence of necrotizing enterocolitis (NEC) in preterm pigs.

Enteral formula feeding is a risk factor for necrotizing enterocolitis (NEC) in premature infants, yet studies are conflicting regarding the safest timing for introduction and advancement of feeds. Our aim was to test the effects of early vs. late initiation and abrupt vs. gradual advancement of enteral feeding of an intact vs. hydrolyzed protein formula on NEC incidence and severity in preterm pigs. In Experiment 1, preterm pigs received total parenteral nutrition (TPN) at birth with abrupt initiation of enteral formula feeds (50% full intake) on d of life (DOL) 2 (EA) or 5 (LA) while PN continued. Pigs were also fed formula containing either intact or hydrolyzed protein. In Experiment 2, preterm pigs received TPN at birth with enteral, hydrolyzed-protein formula feeds introduced on DOL 2 either abruptly (EA; 50% full feeds) or gradually (EG; 10-50% full feeds over 5 d) while PN continued. NEC incidence and severity were assessed based on macroscopic and histological scoring. In Experiment 1, NEC incidence (41% vs. 70%, P<0.05) and severity were reduced in LA vs. EA groups and LA was associated with a higher survival rate, daily weight gain and jejunum villus height. Piglets fed hydrolyzed vs. intact protein formula had lower stomach content weights and similar NEC incidence. In Experiment 2, NEC incidence and severity were not different between pigs the EG vs. EA group. Proinflammatory gene expression (IL-1ß, IL-6 and S100A9) in the ileum was lower in both LA and EG vs. EA groups. In conclusion, delayed initiation but not gradual advancement of enteral feeding is protective against NEC in preterm pigs. Feeding hydrolyzed vs. intact protein formula improved gastric transit without affecting the NEC incidence.

Evolution of highly active enzymes by homology-independent recombination.

The theta-class GST enzymes hGSTT1-1 (human GSTTheta-1-1) and rGSTT2-2 (rat GSTTheta-2-2) share 54.3% amino acid identity and exhibit different substrate specificities. Homology-independent techniques [incremental truncation for the creation of hybrid enzymes (ITCHY) and SCRATCHY] and low-homology techniques (recombination-dependent exponential amplification PCR) were used to create libraries of chimeric enzymes containing crossovers (C/Os) at positions not accessible by DNA family shuffling. High-throughput flow cytometric screening using the fluorogenic rGSTT2-2-specific substrate 7-amino-4-chloromethyl coumarin led to the isolation of active variants with either one or two C/Os. One of these enzymes, SCR23 (83% identity to hGSTT1-1), was encoded by a gene that exchanged helices 4 and 5 of hGSTT1-1 with the corresponding sequence from rGSTT2-2. Compared with either parent, this variant was found to have an improved k(cat) with the selection substrate and also exhibited activity for the conjugation of glutathione to ethacrynic acid, a compound that is not recognized by either parental enzyme. These results highlight the power of combinatorial homology-independent and low-homology recombination methods for the generation of unique, highly active enzymes and also suggest a possible means of enzyme "humanization."