Publications by authors named "Yvonne Avent"

9 Publications

  • Page 1 of 1

Beginning Restorative Activities Very Early: Implementation of an Early Mobility Initiative in a Pediatric Onco-Critical Care Unit.

Front Oncol 2021 8;11:645716. Epub 2021 Mar 8.

Department of Quality Improvement Education and Training, Cincinnati Children's Hospital- James M. Anderson Center for Health Systems Excellence, Cincinnati, OH, United States.

Introduction: Children with underlying oncologic and hematologic diseases who require critical care services have unique risk factors for developing functional impairments from pediatric post-intensive care syndrome (PICS-p). Early mobilization and rehabilitation programs offer a promising approach for mitigating the effects of PICS-p in oncology patients but have not yet been studied in this high-risk population.

Methods: We describe the development and feasibility of implementing an early mobility quality improvement initiative in a dedicated pediatric onco-critical care unit. Our primary outcomes include the percentage of patients with consults for rehabilitation services within 72 h of admission, the percentage of patients who are mobilized within 72 h of admission, and the percentage of patients with a positive delirium screen after 48 h of admission.

Results: Between January 2019 and June 2020, we significantly increased the proportion of patients with consults ordered for rehabilitation services within 72 h of admission from 25 to 56% (<0.001), increased the percentage of patients who were mobilized within 72 h of admission to the intensive care unit from 21 to 30% (=0.02), and observed a decrease in patients with positive delirium screens from 43 to 37% (=0.46). The early mobility initiative was not associated with an increase in unplanned extubations, unintentional removal of central venous catheters, or injury to patient or staff.

Conclusions: Our experience supports the safety and feasibility of early mobility initiatives in pediatric onco-critical care. Additional evaluation is needed to determine the effects of early mobilization on patient outcomes.
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March 2021

Outcome of Acute Respiratory Failure Secondary to Engraftment in Children After Hematopoietic Stem Cell Transplant.

Front Oncol 2020 9;10:584269. Epub 2020 Oct 9.

Department of Bone Marrow Transplantation and Cellular Therapy, St. Jude Children's Research Hospital, Memphis, TN, United States.

Respiratory complications due to engraftment syndrome (ES) in the post-hematopoietic stem cell transplant (HSCT) setting can lead to acute respiratory failure (ARF). Outcomes of children developing ARF due to engraftment are unknown. We conducted a retrospective analysis of 1,527 pediatric HSCT recipients and identified children who developed ARF due to ES over a 17-year period. Thirty patients that developed ARF and required invasive mechanical ventilation (IMV) due to ES were included in this study. The survival rate for our cohort was 80% [alive at intensive care unit (ICU) discharge]. The most common underlying primary disease was hematologic malignancy, and 67% of children underwent allogeneic HSCT. Further, 73% required vasopressor drips and 23% underwent dialysis. Survivors had a shorter median ICU length of stay than did non-survivors (15 vs. 40 days, respectively, = 0.01). Survivors had a significantly lower median cumulative fluid overload % on days 4 and 5 after initiation of IMV than did non-survivors (2.8 vs. 14.0 ml/kg, = 0.038 on day 4, and 1.8 vs. 14.9 ml/kg, = 0.044 on day 5, respectively). Our results suggest that children who develop ARF during engraftment have better ICU survival rates than do those with other etiologies of ARF post-HSCT. Furthermore, fluid overload contributes to mortality in these children; therefore, strategies to prevent and address fluid overload should be considered.
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October 2020

Sensitivity and Specificity of the Modified Epworth Sleepiness Scale in Children With Craniopharyngioma.

J Clin Sleep Med 2019 10;15(10):1487-1493

Department of Pediatric Medicine, Division of Nursing Research, St. Jude Children's Research Hospital, Memphis, Tennessee.

Study Objectives: Children with craniopharyngioma are at risk for excessive daytime sleepiness (EDS). Multiple Sleep Latency Testing (MSLT) is the gold standard for objective evaluation of EDS; however, it is time and resource intensive. We compared the reliability, sensitivity, and specificity of the modified Epworth Sleepiness Scale (M-ESS) and MSLT in monitoring EDS in children with craniopharyngioma.

Methods: Seventy patients (ages 6 to 20 years) with craniopharyngioma completed the M-ESS and were evaluated by polysomnography and MSLT. Evaluations were made after surgery, if performed, and before proton therapy.

Results: MSLT revealed that 66 participants (81.8%) had EDS, as defined by a mean sleep latency (MSL) < 10 minutes, with only 28.8% reporting EDS on the M-ESS by using a cutoff score of 10. The M-ESS demonstrated adequate internal consistency and specificity (91.7%) but poor sensitivity (33.3%) with the established cutoff score of 10. A cutoff score of 6 improved the sensitivity to 64.8% but decreased the specificity to 66.7%.

Conclusions: Patients with craniopharyngioma are at high risk for EDS, as documented objectively on the MSLT, but they frequently do not recognize or accurately report their sleepiness. Future sleep studies should investigate whether specific items or alternative self- and parent-reported measures of sleepiness may have greater clinical utility in monitoring sleepiness in this population.
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October 2019

In-home salivary melatonin collection: Methodology for children and adolescents.

Dev Psychobiol 2018 01 20;60(1):118-122. Epub 2017 Nov 20.

St. Jude Children's Research Hospital, Memphis, Tennessee.

In-home salivary collection quality and adherence to a prescribed collection methodology for evaluation of dim light melatonin onset (DLMO) is unknown in children. Primary aims of this study were to 1) describe a novel family centered methodology for in-home salivary collection; 2) determine the acceptance and feasibility of this methodology; 3) measure adherence to collection instructions; and 4) identify patterns between participants' age and quality of samples collected. After receiving instructional handouts from the study team, families utilized in-home salivary melatonin collection. Participants (N = 64) included 39 children (21 female, mean age 9.5 ± 1.61 years) and 25 adolescents (11 female, mean age 15.9 ± 2.12 years) with craniopharyngioma. Participants were 90% adherent to collection schedule, and 89% of the samples collected were of sufficient quantity and quality, with no differences found between age (child vs. adolescent) and melatonin sample quantity and quality. In-home saliva collection provides an acceptable and feasible method to collect salivary melatonin and biomarkers in children and adolescents.
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January 2018

Safety and Benefits of Bronchoalveolar Lavage and Lung Biopsy in the Management of Pulmonary Infiltrates in Children With Leukemia.

J Pediatr Hematol Oncol 2016 11;38(8):597-601

*Division of Critical Care Medicine †Division of Patient Care Services ‡Division of Respiratory Care Services Departments of §Biostatistics ∥Oncology, St Jude Children's Research Hospital, Memphis, TN.

Background: Children with leukemia are at risk of developing life-threatening opportunistic pulmonary infections. The role of bronchoalveolar lavage (BAL) and lung biopsy (BX) in the management of these patients is controversial. In this study, we evaluate the yield and safety of BAL and BX in children with leukemia.

Procedure: We reviewed the records of all children with leukemia who underwent either BAL or BX between 1997 and 2007 at the St Jude Children's Research Hospital.

Results: A total of 64 patients were included, of whom 35 (55%) had BX and 29 (45%) had BAL. Positive results were obtained in 69% of BAL cohort and in 46% of BX cohort. Both procedures resulted in change in antimicrobial coverage (77% in BX, 83% in BAL). Pulmonary hemorrhage occurred in 2 patients, and transient hypoxia was the most frequent complication. All resolved without negatively impacting the clinical course.

Conclusions: Both BAL and BX are safe and useful in the management of children with leukemia and pulmonary disease.
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November 2016

Impact of continuous renal replacement therapy on oxygenation in children with acute lung injury after allogeneic hematopoietic stem cell transplantation.

Pediatr Blood Cancer 2010 Sep;55(3):540-5

Division of Critical Care Medicine, St. Jude Children's Research Hospital, Memphis, Tennessee 38105-3678, USA.

Background: Acute lung injury (ALI) continues to carry a high mortality rate in children after allogeneic hematopoietic stem cell transplant (HSCT). Continuous renal replacement therapy (CRRT) is often used for these patients for various indications including renal failure and fluid overload, and may have a beneficial effect on oxygenation and survival. Therefore, we sought to determine the effect of CRRT on oxygenation in mechanically ventilated pediatric allogeneic HSCT patients with ALI, and to document survival to intensive care unit discharge in this at-risk population receiving both mechanical ventilation and CRRT.

Procedure: Retrospective analysis of a pediatric allogeneic HSCT cohort admitted to intensive care unit of a single pediatric oncology center from 1994 to 2006 who received CRRT during a course of mechanical ventilation for ALI.

Results: Thirty post-HSCT mechanically ventilated children with ALI who underwent CRRT were included. There was a significant improvement in PaO(2)/FiO(2) with median increase of 31 and 43 in the 24 and 48 hr intervals after initiation of CRRT compared with the 24 hr interval before CRRT (P = 0.0008 and 0.0062, respectively). This improvement in PaO(2)/FiO(2) correlated significantly with reduction of fluid balance achieved after initiation of CRRT (P = 0.0001). There was a trend not reaching statistical significance in improvement in mean airway pressure 48 hr after CRRT in survivors compared to non-survivors.

Conclusions: CRRT improved oxygenation in mechanically ventilated pediatric allogeneic HSCT patients with ALI.
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September 2010

Outcomes of hematopoietic stem cell transplant patients who received continuous renal replacement therapy in a pediatric oncology intensive care unit.

Pediatr Crit Care Med 2010 Nov;11(6):699-706

St. Jude Children's Research Hospital, Memphis, TN, USA.

Objectives: To assess the long-term benefits of continuous renal replacement therapy (CRRT) in this patient population and to analyze factors associated with survival. Hematopoietic stem cell transplantation is being utilized as curative therapy for a variety of disorders. However, organ dysfunction is commonly associated with this therapy. Continuous renal replacement therapy (CRRT) is increasingly being used in the treatment of this multiorgan dysfunction.

Design: Retrospective cohort study.

Setting: A free-standing, tertiary care, pediatric oncology hospital.

Patients: Twenty-nine allogeneic hematopoietic stem cell transplantation patients who underwent 33 courses of CRRT in the intensive care unit between January 2003 and December 2007.

Interventions: Cox proportional hazards regressions models were used to examine the relationship between demographic and clinical variables and length of survival.

Measurements And Main Results: The median length of survival post CRRT initiation was 31 days; only one patient survived >6 mos. Factors associated with increased risk of death included: higher bilirubin and blood urea nitrogen levels before and at 48 hrs into CRRT, lower Pao2/Fio2 ratios at 48 hrs of CRRT, and higher C-reactive protein levels, as well as lower absolute neutrophil counts at CRRT end.

Conclusion: In this single-center study, CRRT was not associated with long-term survival in pediatric allogeneic hematopoietic stem cell transplantation patients. Clinical data exist, both before and during CRRT, that may be associated with length of survival. Lower C-reactive protein levels at CRRT end were associated with longer survival, suggesting that the ability to attenuate inflammation during CRRT may afford a survival advantage. These findings require confirmation in a prospective study.
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November 2010

Successful use of a rapid response team in the pediatric oncology outpatient setting.

Jt Comm J Qual Patient Saf 2010 Jan;36(1):43-5

Pediatric Intensive Care Unit, St. Jude Children's Research Hospital, Memphis, Tennessee, USA.

In a clinic setting, the RRT, in conjunction with the ICU intensivist, succesfully treated a septic patient with fluid resuscitation and a vasoactive medication, and subsequently facilitated a quick transport to a higher level of care. St. Jude Children's Research Hospital's successful use of the RRT in the clinic setting suggests that RRTs can be used to improve patient outcomes across the spectrum of inpatient as well as outpatient hospital settings. Our experience suggests that RRTs can be beneficial in filling a gap in patient safety in outpatient clinics.
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January 2010

Managing calcium imbalance in acute care.

Yvonne Avent

Nurse Pract 2007 Oct;32(10):7-10

Yvonne Avent is an ICU Clinical Nurse Specialist at St. Jude Children's Research Hospital, Memphis, Tenn, USA.

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October 2007