Airway Management and Risk Factors for Prolonged Intubation in Patients with Severe Croup.

Croup is a common respiratory illness in children with a substantial variation in the severity of symptoms. Most of the patients present with mild symptoms, but patients with severe croup require intensive care unit (ICU) management. The aim of this study was to investigate the airway management of patients with severe croup who required intubation and determine the risk factors for prolonged intubation. We performed an 18-year retrospective observational cohort study at the pediatric ICU of a tertiary children's hospital in Japan. A total of 16 patients with croup who were intubated for upper airway obstruction were included in the study. Most patients (13of 16, 81%) were intubated with an endotracheal tube (ETT) smaller than their age-appropriate size. The median difference in the internal diameter (ID) between the selected ETT and the age-appropriate size was 1.0 mm (interquartile range: 0.5-1.0). Multivariate analysis performed on factors affecting the cumulative incidence of extubation revealed that the difference in ID between the selected ETT and age-appropriate size (mm) significantly reduced the duration of intubation (hazard ratio: 0.092, p = 0.03). A downsized ETT without a cuff may be recommended for intubation of patients with croup.

Combination of high-flow nasal oxygen and ketamine/dexmedetomidine sedation for diagnostic catheterization in a child with pulmonary arterial hypertension: a case report.

Pulmonary hypertension is associated with significant risk of perioperative life-threatening events. We present a case of a 12-year-old child with severe pulmonary arterial hypertension who successfully underwent diagnostic cardiac catheterization under ketamine and dexmedetomidine sedation with the support of high-flow nasal oxygen. Ketamine and dexmedetomidine are reported to have minimal effect on pulmonary vasculature in children with pulmonary hypertension and can be safely used in this population along with its lack of respiratory depression. Positive pressure generated by high-flow nasal oxygen improves upper airway patency, prevents micro-atelectasis, and is shown to improve the effectiveness of ventilation and oxygenation in patients under sedation breathing spontaneously. The presented strategy may contribute to enhancing the safety and effectiveness of procedural sedation for children with life-threatening pulmonary hypertension.

Anesthesia management in a child with mucopolysaccharidosis and toxic epidermal necrolysis: A case report.

Toxic epidermal necrolysis and mucopolysaccharidosis are both rare diseases that pose significant airway maintenance challenges to anesthesiologists. In this report, we describe the anesthesia management in a 4-year-old male with mucopolysaccharidosis type II who developed toxic epidermal necrolysis and presented for ophthalmic surgical procedures. Combined use of propofol and ketamine with the support of high-flow nasal oxygen enabled adequate analgesia and sedation while maintaining spontaneous ventilation and airway patency. The strategy presented in this report may contribute to enhancing the safety of sedation in spontaneously breathing children with abnormal airways.

Nurses' perception of pediatric pain and pain assessment in the Japanese PICU.

BACKGROUND: Nurses play an essential role in pain management in the pediatric intensive care unit (PICU). However, their perceptions regarding pediatric pain and current practice of pain assessment in Japanese PICUs remain unknown. METHODS: In January 2021, we conducted a multicenter, cross-sectional survey across 35 PICUs in Japan. A structured questionnaire which focused on nurses' perceptions of pediatric pain and pain assessment was developed, pilot-tested, and revised. Twenty copies of the questionnaire were sent to each institution and were distributed to the nursing staff. RESULTS: A total of 356 nurses from 22 institutions responded. Median age of the respondents was 33 years and 84.6% were female. Median length of nursing experience and PICU experience were 10 and 4 years, respectively. Use of pain scales for assessing pain in children who can self-report pain, preverbal children, and children unable to self-report pain due to cognitive impairment were 90.7%, 55.9%, and 50.0%, respectively. Nurses' satisfaction regarding pain management in their PICU was 31.9% and their confidence in pain assessment and management were 32.6% and 44.9%, respectively. Lack of knowledge (95.8%), difficulty assessing pain in children (95.2%), and delay in physician's action (91.8%) were the most perceived barriers to optimal pain management. CONCLUSIONS: The use of pain scales is insufficient and nurses' satisfaction proved to be extremely low in the Japanese PICUs. Substantial effort is required to enhance the level of current pain management and improve outcomes.

Trajectory of kidney recovery in pediatric patients requiring continuous kidney replacement therapy for acute kidney injury.

BACKGROUND: Acute kidney injury (AKI) is commonly seen in the PICU and is associated with poor short-term and long-term outcomes, especially in patients who required continuous kidney replacement therapy (CKRT). However, as the trajectory of kidney recovery in these patients remain uncertain, determination of the timing to convert to permanent kidney replacement therapy (KRT) remains a major challenge. We aimed to examine the frequency and timing of kidney recovery in pediatric AKI survivors that required CKRT. METHODS: We performed a retrospective study of patients under 18 years old who received CKRT for AKI in a tertiary-care PICU over 6 years. Primary outcomes were the rate of KRT withdrawal due to kidney recovery and KRT-dependent days for those who survived to hospital discharge. Secondary outcomes were all-cause mortality, dialysis dependence, and occurrences of estimated glomerular filtration rate (eGFR) < 90 mL/min/1.73m2 and eGFR < 60 mL/min/1.73m2 one year after initiation of the index CKRT in survivors. RESULTS: Thirty-nine patients were included. Of the 28 children who survived to hospital discharge, 26 (93%) withdrew from dialysis due to kidney recovery, all within 30 days. Twenty-three patients were followed up. One had died, five had an eGFR of 60 mL/min/1.73m2 or more but less than 90 mL/min/1.73m2, and two had an eGFR < 60 mL/min/1.73m2, of which one required peritoneal dialysis. CONCLUSIONS: Over 90% of the survivors withdrew CKRT within 30 days. However, the frequency of abnormal eGFR one year after initiation of CKRT in survivors exceeded 30% and supports the recommendation of post-AKI follow-up.

Unplanned admission to pediatric intensive care after general anesthesia: A seven-year retrospective cohort study in a tertiary children's hospital.

BACKGROUND: Thorough preoperative risk assessment and planning is key to improving patient safety in the perioperative period. Analysis of unplanned ICU admissions after general anesthesia has been validated as a measure of patient safety and its use as a quality initiative is recommended in many countries. AIMS: The aims of this study were to determine the reasons for unplanned ICU admission, required interventions, and outcomes after general anesthesia in our hospital, as well as predictability and preventability of the events that led to admission with a view to improving anesthetic management. METHODS: A single-center, retrospective cohort study in a tertiary children's hospital was performed. All patients under the age of 18 years admitted to our PICU between June 2014 and May 2021 were included. Unplanned ICU admission after general anesthesia was defined as an admission to the ICU either immediately postoperatively or after recovery room stay, which was not planned preoperatively. The reasons for ICU admission were classified as anesthesia-related, surgical, medical, or mixed. Required intervention, length of ICU stay, and patient outcome of each group, as well as preventability and predictability of the events were investigated. RESULTS: There were 75 admissions, representing 0.23% of all general anesthesia procedures during the study period. "Anesthesia-related" was the major reason for admission of which the majority required observation only or transient respiratory support with a median ICU stay of two days. Most of the admissions for medical reasons required disease-specific interventions resulting in the longest ICU stays with a median of six days. A total of 19% of the admissions were preventable, where most of them were for anesthesia-related reasons, and 33% were predictable. Seven patients required cardiopulmonary resuscitation, of which one patient died, giving an observed mortality rate of 1.3% overall. All but one patient who died demonstrated no changes in the Pediatric Cerebral Performance Category (PCPC) scale. CONCLUSION: "Anesthesia-related" was the leading reason for unplanned ICU admissions, of which the majority required only observation or transient respiratory support. All but one patient who died demonstrated no changes in the PCPC scale, presenting favorable outcome overall.

Dexmedetomidine for patients with croup.

Agitation exacerbates symptoms in patients with croup, but the reports on the therapeutic effects of sedation in these patients without intubation are scarce. We describe a typical case of croup wherein light sedation with dexmedetomidine was effective in treating and discuss how agitation exacerbates and sedation improves symptoms from the viewpoint of fluid dynamics theory in addition to the conventional explanation. The mechanism of dynamic airway collapse during inspiration in these patients supports the effectiveness of sedation with dexmedetomidine.

Life-threatening oral mucositis following chemotherapy in a pediatric patient.

Severe oral mucositis as a complication of chemotherapy may lead to airway obstruction and require prolonged intubation. As its course is consistent with the course of neutropenia, airway management strategies should be determined individually.

The Ventilatory Strategy to Minimize Expiratory Flow Rate in Ventilated Patients with Chronic Obstructive Pulmonary Disease.

Although the pathophysiology of chronic obstructive pulmonary disease (COPD) is multifactorial, central airway collapse is reported to have a great impact on symptom severity. In COPD patients, positive pressure formed by hyperinflated lungs compressing the tracheal wall and negative changes in intratracheal static pressure due to rapid expiratory flow velocity at the beginning of expiration collapse the trachea. This phenomenon can be explained by fluid dynamics theory. Our hypothesis is that ventilatory strategy focusing on minimization of expiratory flow rate may be advantageous for patients receiving mechanical ventilation for COPD. If appropriate counter pressure could be applied on exhalation, patients may be able to exhale slowly with reduced expiratory flow rates which may prevent negative changes of the intratracheal static pressure. We devised a new conceptual ventilation mode "minimized expiratory flow rate ventilation (MExV)" which applies regulated counter pressure on exhalation. The conceptual waveforms of "minimized expiratory flow rate ventilation" including flow rate, volume, and airway pressure are shown, compared with typical waveforms of the conventional ventilation modes.