The Association of Workload and Outcomes in the Pediatric Cardiac ICU

Measuring Critical Care Unit Performance Using a Postoperative Mechanical Ventilation Quality Metric

BACKGROUND

Safely minimizing postoperative mechanical ventilation duration after congenital heart surgery could be a cardiac intensive care unit (CICU) quality measure. We aimed to measure CICU performance using duration of postoperative mechanical ventilation and identify organizational factors associated with this metric.

METHODS

Observational analysis of 16,848 surgical hospitalizations of patients invasively ventilated on admission from the operating room from 26 Pediatric Cardiac Critical Care Consortium CICUs. We fitted a multivariable model to predict duration of postoperative mechanical ventilation adjusting for pre- and postoperative factors to measure CICU performance accounting for postoperative illness severity. We used our model to calculate observed-to-expected (adjusted) ventilation duration ratios for each CICU, describe variation across CICUs, and characterize outliers based on bias-corrected bootstrap 95% CIs. We explored associations between organizational characteristics and patient-level adjusted ventilation duration by adding these as independent variables to the model.

RESULTS

We observed wide variation across CICUs in adjusted ventilation duration ratios, ranging from 0.7 to 1.7. Nine of 26 CICUs had statistically better than expected ventilation duration, while 10 were significantly worse than expected. Organizational characteristics associated with shorter adjusted ventilation duration included mixed (60%-90%) staffing by critical care or anesthesia-trained attendings, lower average attending-to-patient ratio, average CICU daily occupancy 80% to 90%, and greater nurse staffing ratios and experience.

CONCLUSIONS

CICU performance in postoperative duration of mechanical ventilation varies widely across Pediatric Cardiac Critical Care Consortium centers. Several potentially modifiable organizational factors are associated with this metric. Taken together, these findings could spur efforts to improve ventilation duration at outlier hospitals.

Durable Vascular Access in Neonates in the Cardiac ICU: A Novel Technique for Tunneled Femoral Central Venous Catheters

OBJECTIVES

There is an ongoing need for a method of obtaining long-term venous access in critically ill pediatric patients that can be completed at the bedside and results in a durable, highly functional device. We designed a novel technique for tunneled femoral access to address this need. Herein, we describe the procedure and review the outcomes at our institution.

DESIGN

A single-center retrospective chart review identifying patients who underwent tunneled femoral central venous catheter (tfCVC) placement between 2017 and 2021 using a two-puncture technique developed by our team.

SETTING

Academic, Quaternary Children's Hospital with a dedicated pediatric cardiac ICU (CICU).

PATIENTS

Patients in our pediatric CICU who underwent this procedure.

INTERVENTIONS

Tunneled femoral central line placement.

MEASUREMENTS AND MAIN RESULTS

One hundred eighty-two encounters were identified in 161 patients. The median age and weight at the time of catheter placement was 22 days and 3.2 kg. The median duration of the line was 22 days. The central line-associated bloodstream infection (CLABSI) rate was 0.75 per 1,000-line days. The prevalence rate of thrombi necessitating pharmacologic treatment was 2.0 thrombi per 1,000-line days. There was no significant difference in CLABSI rate per 1,000-line days between the tfCVC and nontunneled peripherally inserted central catheters placed over the same period in a similar population (-0.40 [95% CI, -1.61 to 0.82; p = 0.52]) and no difference in thrombus rates per 1,000-line days (1.37 [95% CI, -0.15 to 2.89; p = 0.081]).

CONCLUSIONS

tfCVCs can be placed by the intensivist team using a two-puncture technique at the bedside with a high-rate of procedural success and low rate of complications. Advantages of this novel technique of obtaining vascular access include a low rate of CLABSIs, the ability to place it at the bedside, and preservation of the upper extremity vasculature.

Association Between Critical Events in the PICU and Outcomes in Neighboring Patients

PICU patients who experience critical illness events, such as intubation, are at high risk for morbidity and mortality. Little is known about the impact of these events, which require significant resources, on outcomes in other patients. Therefore, we aimed to assess the association between critical events in PICU patients and the risk of similar events in neighboring patients over the next 6 hours.

DESIGN

Retrospective observational cohort study.

SETTING

Quaternary care PICU at the University of Chicago.

PATIENTS

All children admitted to the PICU between 2012 and 2019.

INTERVENTIONS

None.

MEASUREMENTS AND MAIN RESULTS

The primary outcome was a critical event defined as the initiation of invasive ventilation, initiating vasoactive medications, cardiac arrest, or death. The exposure was the occurrence of a critical event among other patients in the PICU within the preceding 6 hours. Discrete-time survival analysis using fixed 6-hour blocks beginning at the time of PICU admission was used to model the risk of experiencing a critical event in the PICU when an event occurred in the prior 6 hours. There were 13,628 admissions, of which 1,886 (14%) had a critical event. The initiation of mechanical ventilation was the most frequent event (n = 1585; 59%). In the fully adjusted analysis, there was a decreased risk of critical events (odds ratio, 0.82; 95% CI, 0.70-0.96) in the 6 hours following exposure to a critical event. This association was not present when considering longer intervals and was more pronounced in patients younger than 6 years old when compared with patients 7 years and older.

CONCLUSION

Critical events in PICU patients are associated with decreased risk of similar events in neighboring patients. Further studies targeted toward exploring the mechanism behind this effect as well as identification of other nonpatient factors that adversely affect outcomes in children are warranted.

ICU Admission Tool for Congenital Heart Catheterization (iCATCH): A Predictive Model for High Level Post-Catheterization Care and Patient Management

OBJECTIVES

Currently, there are no prediction tools available to identify patients at risk of needing high-complexity care following cardiac catheterization for congenital heart disease. We sought to develop a method to predict the likelihood a patient will require intensive care level resources following elective cardiac catheterization.

DESIGN

Prospective single-center study capturing important patient and procedural characteristics for predicting discharge to the ICU. Characteristics significant at the 0.10 level in the derivation dataset (July 1, 2017 to December 31, 2019) were considered for inclusion in the final multivariable logistic regression model. The model was validated in the testing dataset (January 1, 2020 to December 31, 2020). The novel pre-procedure cardiac status (PCS) feature, collection started in January 2019, was assessed separately in the final model using the 2019 through 2020 dataset.

SETTING

Tertiary pediatric heart center.

PATIENTS

All elective cases coming from home or non-ICU who underwent a cardiac catheterization from July 2017 to December 2020.

INTERVENTIONS

None.

MEASUREMENTS AND MAIN RESULTS

A total of 2,192 cases were recorded in the derivation dataset, of which 11% of patients ( n = 245) were admitted to the ICU, while 64% ( n = 1,413) were admitted to a medical unit and 24% ( n = 534) were discharged home. In multivariable analysis, the following predictors were identified: 1) weight less than 5 kg and 5-9.9 kg, 2) presence of systemic illness, 3) recent cardiac intervention less than 90 days, and 4) ICU Admission Tool for Congenital Heart Catheterization case type risk categories (1-5), with C -statistics of 0.79 and 0.76 in the derivation and testing cohorts, respectively. The addition of the PCS feature fit into the final model resulted in a C -statistic of 0.79.

CONCLUSIONS

The creation of a validated pre-procedural risk prediction model for ICU admission following congenital cardiac catheterization using a large volume, single-center, academic institution will improve resource allocation and prediction of capacity needs for this complex patient population.

Direct Discharge to Home From the Pediatric Cardiovascular ICU

OBJECTIVES

To describe direct discharge to home from the cardiovascular ICU.

DESIGN

Mixed-methods including retrospective Pediatric Cardiac Critical Care Consortium and Pediatric Acute Care Cardiology Collaborative data and survey.

SETTING

Tertiary pediatric heart center.

PATIENTS

Patients less than 25 years old, with a cardiovascular ICU stay of greater than 24 hours and direct discharge to home from January 1, 2016, to December 8, 2020, were included. Select data describing patients discharged from acute care internally and nationally from Pediatric Acute Care Cardiology Collaborative sites were compared with the direct discharge to home cohort.

INTERVENTIONS

None.

MEASUREMENTS AND MAIN RESULTS

Encounter- and patient-specific characteristics. Seven-day and 30-day readmission and 30-day mortality served as surrogate safety markers. A survey of cardiovascular ICU frontline providers assessed comfort and skills related to direct discharge to home.There were 364 direct discharge to home encounters that met inclusion criteria. The majority of direct discharge to home encounters were associated with a surgery or procedure (305; 84%). There were 27 encounters (7.4%) for medical technology-dependent patients requiring direct discharge to home. Unplanned 7-day readmissions among direct discharge to home patients was 1.9% compared with 4.6% (p = 0.04) of patients discharged from acute care internally. Readmission among those discharged from acute care internally did not differ from those at Pediatric Acute Care Cardiology Collaborative sites nationally. Frontline cardiovascular ICU providers had mixed levels of confidence in technical aspects and low levels of confidence in logistics of direct discharge to home.

CONCLUSIONS

Cardiovascular ICU direct discharge to home was not associated with increased unplanned readmissions compared with patients discharged from acute care and may be safe in select patients. Frontline cardiovascular ICU providers feel time constraints challenge direct discharge to home. Further research is needed to identify patient characteristics associated with safe direct discharge to home and systems needed to support this practice.Summary statistics are described using proportions or medians with interquartile ranges (IQRs) and were performed using Microsoft Excel (Microsoft, Redmond, WA). Two-sample tests of proportions were used to compare readmission frequency of the DDH cohort compared with internal and national PAC3 data using STATA Version 15 (StataCorp, College Station, TX).

Training needs assessment for practicing pediatric critical care nurses in Malawi to inform the development of a specialized master's education pathway: a cohort study

Background

Significant improvements in under-five mortality in Malawi have been demonstrated over the past thirty years; however, Malawian healthcare remains with gaps in availability and access to quality pediatric critical care nursing training and education. To improve expertise of pediatric critical care nurses in Malawi, Kamuzu University of Health Sciences (KUHeS), Queen Elizabeth Central Hospital (QECH), and Mercy James Center (MJC) entered a partnership with Seed Global Health, a US non-governmental organization. A needs assessment was conducted to understand the training needs of nurses currently working in pediatric critical care and in preparation for the development of a specialized Master’s in Child Health pathway in Pediatric Critical Care (PCC) Nursing at KUHeS.

Methods

The needs assessment was completed using a survey questionnaire formatted using an ABCDE (Airway, Breathing, Circulation, Disability, and Exposure) framework. The questionnaire had Likert scale and yes/no questions. Data was manually entered into excel and was analyzed using descriptive statistics.

Results

One hundred and fifty-three nurses at QECH and MJC responded to the survey. Most nurses were between the ages of 25 and 35 years (N = 98, 64%), female (N = 105, 69%), and held either a Bachelors (N = 72, 47%) or diploma (N = 70, 46%) in nursing. Nurses had high rates of confidence in certain skills: airway management (N = 120, 99%), breathing assessment & management (N = 153, 100%). However, nurses demonstrated little to no confidence in areas such as: mechanical ventilation (N = 68, 44%), ECG evaluation (N = 74, 48%), and arterial blood gas collection & interpretation (N = 49, 32%).

Conclusion

It is important to identify priority areas for training and skills development to address in the PCC master’s within the child health pathway at KUHeS. Ideally this partnership will produce practice-ready PCC nurses and will establish a recognized PCC nursing workforce in Malawi.