Intracranial hypertension: a current review

Effect of different head-high lateral extubation on adverse reactions in the peri-extubation period of pediatric OSAS surgery under general anesthesia

BACKGROUND

Children with OSAS are prone to various airway complications during tracheal extubation after tonsillectomy and adenoidectomy due to oropharyngeal secretions and oozing blood. However, few studies have examined the effect of position on airway complications after tracheal extubation in children with OSAS. The aim of this study was to investigate the appropriate position for extubation in children with OASA.

METHODS

A total of 459 children aged 3-14 years with OSAS who underwent tonsillectomy and adenoidectomy were recruited for this study. All children were treated with the same surgical approach and standard anesthesia methods of induction of anesthesia, tracheal intubation and maintenance of anesthesia. At the end of surgery, the children were delivered to the post anesthesia care unit and randomly divided into three groups: Group A: Head-high 0° in lateral position; Group B: Head-high 15° in lateral position; Group C: Head-high 30° in lateral position. The main outcomes of this study were the pulse oxygen saturation (SpO₂) and the Sedation-Agitation Scale (SAS) scores of the children after extubation, the outflow of oral-nasal secretions and the respiratory complications. Secondary outcomes were blood pressure, heart rate, end-respiratory carbon dioxide, respiratory rate, and post-operative awakening time of the children in three groups.

RESULTS

Data from a total of 423 children were statistically analyzed, 141 in Group A, 142 in Group B, and 140 in Group C. The main results showed a significant decrease in choking response after extubation in Group B (46.5%) and Group C (40.7%) compared to Group A (60.3%) (P < 0.05). The SAS score for postoperative agitation was higher in Group A (4.6 [Formula: see text] 0.9) than in Group B (4.4 [Formula: see text] 0.7) and Group C (4.3 [Formula: see text] 0.6) (P < 0.05). Also the SpO₂ after extubation was higher in Group B (97.2%) and Group C (97.1%) than in Group A (95.8%) (P < 0.05). In contrast, there was no difference in the occurrence of respiratory complication and postoperative agitation in children between Group B and Group C (all P > 0.05). In addition, there was no difference in the amount of oral-nasal secretions among the children in the three groups (all P > 0.05).

CONCLUSION

The head-high 15° lateral position and head-high 30° lateral position can reduce the incidence of airway complications and agitation and provide safe and comfortable extubation conditions for children during the peri-extubation period after tonsillectomy and adenoidectomy, which has certain clinical guidance value.

TRIAL REGISTRATION

Registration Number: NO.ChiCTR2200055835(20,01,2022) https://www.chictr.org.cn.

Treatment recommendations for non-HIV associated cryptococcal meningoencephalitis including management of post-infectious inflammatory response syndrome

Cryptococcal meningoencephalitis (CM) continues to cause major morbidity and mortality in a range of patients such as those immunosuppressed from HIV and with biologic immunosuppressants, including treatments of autoimmunity, malignancies, and conditioning regimens for transplantation. It is currently the most common cause of non-viral meningitis in the United States. Infections in previously healthy patients also develop with autoantibodies to granulocyte-macrophage colony stimulating factor or with monogenetic defects. In all populations, mortality and significant long-term morbidity occur in 30-50% despite therapy, and immune reconstitution and post-infectious inflammatory response syndromes complicate management. To help with these difficult cases, we present here a practical tutorial of the care of a range of patients with CM in the absence of HIV/AIDS.

Correlation between the Optic Nerve Sheath Diameter Measurement and Intracranial Hypertension Tomographic Findings from a Colombian Hospital

Objective In the present study, we aimed at determining the correlation between tomographic findings of intracranial hypertension and ultrasound measurement of the optic nerve sheath diameter (ONSD).

Methods Observational, descriptive, prospective, cross-sectional pilot study. The present research was performed in a tertiary hospital in Cali, Colombia, from March 2019 to October 2019. Twenty-five patients constituted the intracranial hypertension group, and 25 patients without intracranial hypertension constituted the control group. Ultrasound measurements of the ONSD were assessed using a Sonosite Turbo (SonoSite Inc., Bothell, WA, USA) ultrasound. The computed tomography (CT) images obtained from each patient diagnosed with intracranial hypertension were available in the software of the hospital. The primary outcome was the ultrasound measurement of the ONSD.

Results The ONSD values of the right eye of the intracranial hypertension group ranged from 5.2 to 7.6 mm, and the ONSD of the left eye ranged from 5.3 to 7.3 mm. The global ONSD values, obtained from the average between the right and left eye, were recorded between 5.25 and 7.45 mm. Overall, our study indicated that ultrasound measurements of the ONSD were effective in differentiating a group with intracranial hypertension, previously diagnosed by CT scan images, from patients without this condition. According to the ROC curve, the optimal cutoff point for detecting intracranial hypertension was 5.2 mm.

Conclusions Ultrasound measurements of the ONSD correlated with the measurements obtained from CT scan images, suggesting that the ultrasound technique can be efficient in identifying patients with intracranial hypertension and valuable in cases when CT scan images are not an available option.

Migration complications of lumboperitoneal shunts

Background

Lumboperitoneal (LP) shunts have been described as a safe and effective option for idiopathic intracranial hypertension (IIH). However, it had many complications, including migration. Herein, we report our experience regarding the incidence, different sites, presentation, and management of LP shunt migration in patients with IIH.

Patients and methods

This retrospective series reviewed the data of IIH patients who had migration after LP shunt during the period between January 2018 and June 2021.

Results

From 67 patients who had LP shunt, 12 patients developed shunt migration. Two cases had intrathecal migration, while three cases had intraperitoneal migration. In four cases, the distal tube migrated to the subcutaneous location at the abdomen, whereas the other two cases had the proximal tube migrated outside the thecal sac to the subcutaneous location in the back. In one case, the distal tube migrated from the abdomen to the back subcutaneously.

Conclusion

The insertion of LP shunts appears to be a relatively safe technique. Shunt migration, on the other hand, is a common side effect. While various theories have been proposed to explain shunt migration, good shunt fixation remains the most critical component in preventing shunt migration.

Idiopathic intracranial hypertension in a child with Bardet-Biedl syndrome

BACKGROUND

Bardet-Biedl syndrome (BBS) is known to be associated with hydrocephalus, but not with idiopathic intracranial hypertension (IIH). Case presentation: We describe such a case and propose the pathogenesis. We also discuss the challenges of diagnosis, treatment, and monitoring outcomes in this population that is already at high risk of vision loss from retinal dystrophy.

CONCLUSION

IIH can result from a combination of risk factors in conjunction with the underlying dysfunctional cilia in BBS patients. Monitoring disease progression is difficult, and as such IIH may be underdiagnosed or missed. Management must be adjusted to account for BBS patients' impaired metabolic and renal physiology. It is important that clinicians be aware of these challenges in this vulnerable population, and regular monitoring should be done to avoid preventable vision loss.

Recognition of intracranial hypertension using handheld optical coherence tomography in children (RIO Study): a diagnostic accuracy study protocol

INTRODUCTION

Paediatric intracranial hypertension (IH) is a rare but serious condition that can pose deleterious effects on the brain and vision. Estimating intracranial pressure (ICP) in children is difficult. Gold standard direct ICP measurement is invasive and carries risk. It is impractical to routinely perform direct ICP measurements over time for all children at risk of IH. This study proposes to assess the diagnostic accuracy of handheld optical coherence tomography (OCT), a non-invasive ocular imaging method, to detect IH in children.

METHODS AND ANALYSIS

This is a prospective study evaluating the diagnostic accuracy of handheld OCT for IH in at risk children. Inclusion criteria include clinical and/or genetic diagnosis of craniosynostosis, idiopathic intracranial hypertension, space occupying lesion or other conditions association with IH and age 0-18 years old. Exclusion criteria include patients older than 18 years of age and/or absence of condition placing the child at risk of IH. The primary outcome measures are handheld OCT and 48-hour ICP assessments, which will be used for diagnostic accuracy testing (sensitivity, specificity, positive predictive value, negative predictive value and accuracy). Main secondary outcome measures include visual acuity, fundoscopic examination, contrast sensitivity, visual field testing and visual evoked potentials, wherever possible.

ETHICS AND DISSEMINATION

Ethical approval was granted for this study by the East Midlands Nottingham 2 Research Ethics committee (UOL0348/IRAS 105137). Our findings will be disseminated through presentation at relevant meetings, peer-reviewed publication and via the popular media.

TRIAL REGISTRATION NUMBER

ISRCTN52858719.

Craniosynostosis Surgery for Increased Intracranial Pressure

INTRODUCTION

Craniosynostosis is the premature fusion of 1 or more cranial sutures. The presentation may vary, and there are differing opinions regarding surgical indications and timing. Though increased intracranial pressure (ICP) is a well-established risk of craniosynostosis, its response to treatment is not uniform. This study aims to identify the signs and symptoms indicative of increased ICP that are most likely to improve after craniosynostosis surgery.

METHODS

Pre- and post-operative data were retrospectively collected from patients at our institution with syndromic and non-syndromic craniosynostosis from January 2009 to June 2020. Demographics, symptoms (headache, nausea, emesis, and lethargy), signs (visual disturbances and papilledema), and imaging characteristics (copper beaten changes), if available, were analyzed.

RESULTS

One hundred fifty-three children with craniosynostosis were identified, and 56 with preoperative symptoms met inclusion criteria. Older age was significantly correlated with the number of symptoms improved postoperatively (P = 0.015). Papilledema, headache, nausea, and irritability (if present preoperatively) were the features most likely to improve after craniosynostosis repair. Optic nerve or disc anomalies, feeding difficulties, seizures, and need for glasses were least likely to improve.

CONCLUSIONS

Older children undergoing craniosynostosis surgery had a greater number of improved symptoms. Classical features of increased ICP were more likely to improve than developmental difficulties and multifactorial causes. These findings may be useful when considering craniosynostosis repair in a symptomatic child.

Detection of intracranial hypertension in children using optical coherence tomography: a systematic review

OBJECTIVES

To evaluate the diagnostic capability of optical coherence tomography (OCT) in children aged under 18 years old with intracranial hypertension (IH).

DESIGN

Systematic review.

METHODS

We conducted a systematic review using the following platforms to search the keywords 'optical coherence tomography' and 'intracranial hypertension' from inception to 2 April 2020: Cochrane Central Register of Controlled Trials, EMBASE, MEDLINE, PubMed and Web of Science, without language restrictions. Our search returned 2729 records, screened by two independent screeners. Studies were graded according to the Oxford Centre for Evidence-Based Medicine and National Institutes of Health Quality Assessment Tool for observational studies.

RESULTS

Twenty-one studies were included. Conditions included craniosynostosis (n=354 patients), idiopathic IH (IIH; n=102), space-occupying lesion (SOL; n=42) and other pathology (n=29). OCT measures included optic nerve parameters, rim parameters (notably retinal nerve fibre layer thickness) and retinal parameters. Levels of evidence included 2b (n=13 studies), 3b (n=4) and 4 (n=4). Quality of 10 studies was fair and 11 poor. There was inconsistency in OCT parameters and reference measures studied, although OCT did demonstrate good diagnostic capability for IH in craniosynostosis, IIH and SOL.

CONCLUSIONS

This systematic review identified various studies involving OCT to assist diagnosis and management of IH in children with craniosynostosis, IIH, SOL and other pathology, in conjunction with established clinical measures of intracranial pressure. However, no level 1 evidence was identified. Validating prospective studies are, therefore, required to determine optimal OCT parameters in this role and to develop formal clinical guidelines.

PROSPERO REGISTRATION NUMBER

CRD42019154254.

Detection of intracranial hypertension in children using optical coherence tomography: a systematic review protocol

INTRODUCTION

Intracranial hypertension (ICH) in children can have deleterious effects on the brain and vision. It is notoriously difficult to estimate intracranial pressure (ICP) in children and existing methods deliver suboptimal diagnostic accuracy to be used as screening tools. Optical coherence tomography (OCT) may represent a valuable, non-invasive surrogate measure of ICP, as has been demonstrated in a number of associated conditions affecting adults. More recently, OCT has been employed within the paediatric age group. However, the role of OCT in detecting ICH in children has not been rigorously assessed in a systematic review for all relevant conditions. Here, we propose a systematic review protocol to examine the role of OCT in the detection of ICH in children.

METHODS AND ANALYSIS

Electronic searches in the Cochrane Central Register of Controlled Trials, Medline, Embase, Web of Science and PubMed will identify studies featuring OCT in detecting ICH in children. Two independent screeners will identify studies for inclusion using a screening questionnaire. The systematic search and screening will take place between 2 April 2020 and 1 June 2020, while we aim to complete data analysis by 1 September 2020. Quality assessment will be performed using the National Institutes of Health Quality Assessment Tool for Observational Cohort and Cross-Sectional Studies. The primary outcome measure is the sensitivity and specificity of OCT in detecting ICH in children. Secondary outcomes measures include conditions associated with ICH per study, direct ICP monitoring, sensitivity and specificity of other measures for ICP and OCT parameters used.

ETHICS AND DISSEMINATION

Ethical approval is not required for the proposed systematic review as no primary data will be collected. The findings will be disseminated through presentations at scientific meetings and peer-reviewed journal publication.

PROSPERO REGISTRATION NUMBER

CRD42019154254.

Long-Term Follow-up of Pseudotumor Cerebri Syndrome in Prepubertal Children, Adolescents, and Adults

PURPOSE

Pseudotumor cerebri syndrome can have a recurrent course. We compared the long-term disease course, recurrences, and final visual outcomes in prepubertal children, adolescents, and adults.

METHODS

In this retrospective observational study, patients were divided into prepubertal children (group A) adolescents (group B), and adults (group C).

RESULTS

Sixty-five patients (56 females, nine males) were included, 26.2% in group A, 24.6% in group B, and 49.2% in group C. Age at diagnosis was 8.6 ± 2.0 years, 14.3 ± 1.5 years, and 31.9 ± 9.7 years for the prepubertal children, adolescents, and adults, respectively. Medical treatment duration was similar (2.4 to 3.3 years, P > 0.05). Recurrences were observed in 23.5% of prepubertal children, 50% of adolescents, and 28.1% of adults. Recurrences occurred within 1.3 ± 0.6 years from treatment cessation in the prepubertal group compared with 3.8 ± 5.1 years in adolescents and 2.7 ± 2.0 years in adults (P = 0.267). Optic neuropathy was evident in 41% of group A, 31% of group B, and 87.5% of group C (P < 0.001). Obesity and cerebrospinal fluid opening pressures were unassociated with either relapsing rates or final visual outcomes in all groups.

CONCLUSIONS

Pseudotumor cerebri syndrome exhibits a relapsing course in a third of cases. Recurrences tend to occur within one year after treatment cessation in prepubertal children, and within three years in older patients, revealing the importance of longer follow-up, especially in adults. Optic neuropathy was more common in adults along with a tendency for visual decline. Longer treatment times were associated with fewer recurrences.