Determinants and outcomes of ventriculoperitoneal shunt infections in Enugu, Nigeria

Assessment of childhood intracranial pressure: a comparative study of transcranial Doppler ultrasound indices and findings at ventriculoperitoneal shunt

PURPOSE

This study compares transcranial Doppler (TCD) Pulsatility Index (PI) and Resistivity Index (RI) with intra-operative CSF opening pressure measured by manometric technique during ventriculoperitoneal (V-P) shunt in children with hydrocephalus.

METHODS

It was a prospective, hospital-based study performed among patients diagnosed with hydrocephalus. Patients had TCD ultrasonography before V-P shunt. The TCD sonography was repeated within 1 week post-op, and at 1 month post-op. The PI and RI were retrieved after insonating the middle cerebral artery. Ventricular CSF opening pressure was measured. Associations between TCD indices and CSF pressure were determined using the t-test and the Wilcoxon rank /Mann-Whitney tests where the normality test failed. A p-value of < 0.05 was considered significant for associations.

RESULTS

Fifty-two patients were enrolled with a mean age of 9.9 ± 11.5 months. Of these, 41 (78.8%) were aged ≤ 12 months. The mean CSF opening pressure was 21.4 ± 9.0. When raised, ICP was defined as opening pressure > 15 cm of H2O, high PI (≥ 1.19), and high RI (> 0.8) diagnosed it with a sensitivity of 55% and 50%, respectively. The mean pre-operative PI (1.17 ± 0.56) reduced to 0.96 (Z =  - 2.032, p = 0.042), while that of RI (0.66 ± 0.17) also decreased to 0.58 (t = 2.906, p = 0.044) after V-P shunt surgery. A strong positive correlation exists between a reduction in PI and RI after V-P shunt (r = 0.743, p = 0.014).

CONCLUSION

Both PI and RI significantly decrease following V-P shunt, but a single reading has a poor sensitivity in predicting ICP.

Ventriculoperitoneal shunt infection rate and other associated complications of VP shunt insertion in Abuja, Nigeria

Background

Complications associated with ventriculoperitoneal shunt insertion constitute a significant cause of morbidity and mortality among hydrocephalus patients. Despite this, VP shunt placement has remained the mainstay of treatment for hydrocephalus. The aim of this study is to evaluate the complications of VP shunt surgery in our environment and to identify the risk factors associated with it.

Methodology

Patients who had VP shunt surgery over a period of two years (Jan 2015-December 2016) were evaluated retrospectively by reviewing their hospital records. The patients' demography, aetiology and clinical presentation of the hydrocephalus, and complications were analysed using SPSS version 26.0. Results were presented in tables and figures.

Results

A total of 69 patients who had VP shunt over the study period had complete medical records available for review. Their age ranged between 2days and 68years with a male to female ratio of 1.8:1. Overall complication rate was 30.4%. Shunt malfunction (11.5%) and shunt infection (7.2%) were the commonest complications recorded. Late presentation was the most important risk factor for shunt complications.

Conclusion

The rate of shunt complications seen in this study compares fairly with studies in other parts of the world.

Neuro-oncology access in Sub-Saharan Africa: A literature review of challenges and opportunities

Background

Ensuring equitable access to treatments and therapies in the constantly evolving field of neuro-oncology is an imperative global health issue. With its unique demographic, cultural, socioeconomic, and infrastructure characteristics, Sub-Saharan Africa faces distinct challenges. This literature review highlights specific barriers to neuro-oncology care in the region and explores potential opportunities for enhancing access.

Methods

Predetermined keyword searches were employed to screen titles and abstracts using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses framework. Inclusion criteria were studies published between January 1, 2003, and June 20, 2023, specifically addressing the capacity and challenges of neuro-oncology in the Sub-Saharan African region. The data sources queried were PubMed and Google Scholar. Systematic reviews and meta-analyses were deliberately excluded. All authors conducted independent screening and structured data extraction meticulously.

Results

Our paper identified multiple challenges that impede access to quality treatment for brain tumors. These include constrained resources, insufficient training of healthcare professionals, certain cultural beliefs, and a general lack of awareness about brain tumors, all contributing to delayed diagnosis and treatment. Furthermore, the lack of detailed data on the incidence and prevalence of primary central nervous system tumors impairs the accurate assessment of disease burden and precise identification of areas requiring improvement. However, we discovered that ongoing research, advocacy, enhanced training, mentorship, and collaborative efforts present valuable opportunities for substantial progress in neuro-oncology access.

Conclusions

While we provide a glimpse of the current state, we hope these results will help stimulate dialogue and catalyze initiatives to surmount highlighted obstacles and improve neuro-oncology outcomes across Sub-Saharan Africa.

Mortality and complications 1 year after treatment of hydrocephalus with endoscopic third ventriculostomy and ventriculoperitoneal shunt in children at Queen Elizabeth Central Hospital, Malawi

BACKGROUND

Over the past two decades, the management of hydrocephalus has witnessed the addition of endoscopic third ventriculostomy with or without choroid plexus cauterization (ETV ± CPC) to the traditional methods including ventriculoperitoneal shunt insertion (VPSI). We conducted this study to assess mortality and complications with surgical implications associated with the two procedures in children with hydrocephalus.

METHODS

We reviewed our operating theater registry to identify children below 17 years old who underwent hydrocephalus surgery for the first time in 2016. The patients were followed for up to 1 year from the date of the initial operation. Their vital status was confirmed by follow-up visits by a community nurse. Descriptive analyses were used to describe the characteristics of the patients and evaluate the study outcomes (i.e., mortality and complications).

RESULTS

One hundred fifty-three patients were eligible for the study; 56% were males and 73.2% had primary ETV ± CPC. Complete 1-year follow-up data was available for 79 patients, and 73.4% of these had ETV ± CPC. One-year success (event-free) rates for ETV and VPSI were similar at 67.4% and 66.7%, respectively. ETVs in infants under 6 months performed poorly; failing in half the infants, who were subsequently converted to VPS. Shunt sepsis was very high, 21.4% (95% CI 10.3-36.8). The majority of surgical complications (81.8%) occurred within 3 months of surgery.

CONCLUSION

ETV ± CPC and VPSI carry a similar frequency of mortality and complications in our setting, and therefore, both should be considered as a treatment option for patients with hydrocephalus. As VP shunt is still used for managing most of the patients, there is still a need to prioritize measures to reduce shunt infections.

Aetiology and diagnostics of paediatric hydrocephalus across Africa: a systematic review and meta-analysis

BACKGROUND

We aimed to identify the aetiological distribution and the diagnostic methods for paediatric hydrocephalus across Africa, for which there is currently scarce evidence.

METHODS

In this systematic review and meta-analysis, we searched MEDLINE (Ovid), the Cochrane Database of Systematic Reviews (Wiley), Embase (Ovid), Global Health (Ovid), Maternity & Infant Care (Ovid), Scopus, African Index Medicus (Global Index Medicus, WHO) and Africa-Wide Information (EBSCO) from inception to Nov 29, 2021. We included studies from any African country reporting on the distribution of hydrocephalus aetiology in children aged 18 years and younger, with no language restrictions. Hydrocephalus was defined as radiological evidence of ventriculomegaly or associated clinical symptoms and signs of the disorder, or surgical treatment for hydrocephalus. Exclusion criteria were studies only reporting on one specific subgroup or one specific cause of hydrocephalus. We also excluded conference and meetings abstracts, grey literature, editorials, commentaries, historical reviews, systematic reviews, case reports and clinical guidelines, as well as studies on non-humans, fetuses, or post-mortem reports. The proportions of postinfectious hydrocephalus, non-postinfectious hydrocephalus, and hydrocephalus related to spinal dysraphism were calculated using a random-effects model. Additionally, we included a category for unclear cases. Diagnostic methods were described qualitatively. To assess methodological study quality, we applied critical appraisal checklists provided by the Joanna Briggs Institute. The study was registered in Prospero (CRD42020219038).

FINDINGS

Our search yielded 3783 results, of which 1880 (49·7%) were duplicates and were removed. The remaining 1903 abstracts were screened and 122 (6·4%) full articles were sought for retrieval; of these, we included 38 studies from 18 African countries that studied a total of 6565 children. The pooled proportion of postinfectious hydrocephalus was 28% (95% CI 22-36), non-postinfectious hydrocephalus was 21% (95% CI 13-30), and of spinal dysraphism was 16% (95% CI 12-20), with substantial heterogeneity. The pooled proportion of hydrocephalus of unclear aetiology was 20% (95% CI 13-28).

INTERPRETATION

Our findings suggest that postinfectious hydrocephalus is the single most common cause of paediatric hydrocephalus in Africa. For targeted investments to be optimal, there is a need for consensus regarding the aetiological classification of hydrocephalus and improved access to diagnostic services.

FUNDING

Rikshospitalet, Oslo University Hospital, Oslo, Norway.

Global trends in the evaluation and management of cerebrospinal fluid shunt infection: a cooperative ISPN survey

INTRODUCTION

Ventriculoperitoneal shunts (VPS) is commonly performed by pediatric neurosurgeons and there is no consensus in management of VPS infection as it relates to diagnosis and treatment.

OBJECTIVE

We utilized an international practitioner-based survey to study the variability in VPS infection diagnostic and therapeutic measures.

METHODS

A survey gauging practice patterns of pediatric neurosurgeons regarding VPS and its complication management was distributed. Survey endpoints were analyzed by VPS case volume and pediatric-focused case volume regarding diagnostic measures, use of cerebrospinal fluid (CSF) profile, microbiology, and treatment.

RESULTS

A total of 439 surveys were distributed, with a response rate of 31%. Responders ranged from Americas (44.9%), European (31.4%), Asian (18.6%), African (2.5%), to Australian continents (2.5%). Practitioners were stratified based on number and percentage pediatric VPS performed. Institutions performing highest VPS and percentage pediatric case volumes had lower rate of VPS infection. Shunt tap was the most widely used diagnostic study. Overall CSF profile did not affect decision making towards VPS internalization, except for leukocyte count ≤ 20 × 10⁹/L. Practitioners utilized 3 negative cultures prior to VPS internalization. Discrepancies in surgical management were noted amongst centers with high versus low VPS volume and proportion of pediatric-focused case volume. Practice patterns were not noted to be organism dependent. Antibiotic-impregnated shunts were utilized in the Americas and Europe over other regions but only in one third of all initial VPS or as a preventive strategy after a VPS infection has been resolved respectively.

DISCUSSION

Survey results from 6 continents in VPS management revealed patterns of lower infection in high-volume centers, 3 negative cultures prior to internalization and aggressive surgical VPS infection management in high-volume institutions.

Review of Clinically and Epidemiologically Relevant Coagulase-Negative Staphylococci in Africa

Coagulase-negative staphylococci (CoNS) have engendered substantial interest in recent years as pathogenic causes of infections in both human and veterinary medicine, especially in the immunocompromised, critically ill, long-term hospitalized and in those harboring invasive medical devices such as catheters. They have been implicated in infections such as urinary tract infections, bloodstream infections, and invasive device-related infections, and are responsible for substantial economic losses in livestock production. The advancement of diagnostic techniques has increased our understanding of their molecular mechanisms of pathogenicity, even though distinguishing between innocuousness and pathogenicity is still challenging. The incidence of CoNS varied across the continent in humans and animals (mainly cattle), ranging from 6% to 68% in suspected human infections and from 3% to 61.7% in suspected animal infections, distributed across different geographic locations. Furthermore, there were varying antibiotic resistance patterns observed in CoNS isolates, with high methicillin resistance in some cases, leading to crossresistance against many antibiotics. Staphylococcus epidermidis, Staphylococcus haemolyticus, and Staphylococcus xylosus were most commonly reported in studies herein reviewed, while the enterotoxin C gene, atl E gene, ica gene, and hemolysin virulence factors were linked with enhanced pathogenicity. Advancement in identification and typing methods, including whole genome sequencing, virulence screening, and the assessment of the immune status of subjects in studies will help to thoroughly assess the true pathogenic potential of isolated CoNS species in developing countries. Careful antibiotic stewardship guidelines should be followed due to the ability of CoNS to develop multidrug resistance.

Endoscopic third ventriculostomy versus shunt for pediatric hydrocephalus: a systematic literature review and meta-analysis

BACKGROUND

Optimized management of pediatric hydrocephalus remains the subject of debate. Ventriculoperitoneal shunt is largely considered the standard of care. However, the advancements and introduction of new cerebrospinal fluid (CSF) diversion approaches including the use of endoscopic third ventriculostomy (ETV) offer appealing alternatives that have been reported in numerous observational series.

OBJECTIVE

To evaluate the comparative safety and efficacy of shunting and ETV in pediatric hydrocephalus cases.

METHODS

This systematic literature review was performed according to the PRISMA guidelines. Eligible studies were identified through a search of PubMed (Medline) and Cochrane until October 2018. A random effects model meta-analysis was conducted and the I-square was used to assess heterogeneity. The ROBINS-1 tool and Cochrane tool were used to assess risk of bias in the observational and randomized studies, respectively.

RESULTS

Fourteen studies including 8419 patients were identified. Patients in the ETV group had a statistically significant lower risk of infection compared to shunt (OR: 0.19; 95% CI: 0.07-0.53; I²: 0%). All-cause mortality (OR: 0.77; 95% CI: 0.35-1.68; I²: 0%), post-operative CSF leak (OR: 1.53; 95% CI: 0.37-6.31; I²: 0%), and reoperation rates were similar between the two study groups (OR: 0.72; 95% CI: 0.39-1.32; I²: 93.5%). Subgroup analyses for re-operation demonstrated that ETV in Africa (OR: 0.13; 95% CI: 0.03-0.48; I²: 0%) and Europe (OR: 0.39; 95% CI: 0.30-0.52; I²:1.4%) was associated with significantly lower odds of re-operation compared to shunt, but not in USA/Canada (OR: 1.49; 95% CI: 0.85-2.63; I²:86.2%). Meta-regression analyses of age and duration of follow-up did not affect re-operation rates.

CONCLUSIONS

ETV was associated with a statistically significant lower risk of procedure-related infection compared to shunt. All-cause mortality, CSF leak, and re-operation rates were similar between the study groups. Subgroup analysis based on the geographic region showed that ETV is associated with statistically significant lower odds for re-operation in Europe and Africa, but not in USA/Canada. Future RCTs are needed to validate the results of this study and elucidate the cause of this heterogeneity.

Endoscopic third ventriculostomy (ETV) and ventriculoperitoneal shunt (VPS) in non-communicating hydrocephalus (NCH): comparison of outcome profiles in Nigerian children

BACKGROUND

Endoscopic third ventriculostomy (ETV) and ventriculo-peritoneal shunt (VPS) although recognized surgical options for non-communicating hydrocephalus have debatable applications.

OBJECTIVE

We analysed a prospective cohort of age-matched children with non-tumor, non-communicating hydrocephalus treated with the two surgical modalities using clinically measurable parameters.

METHODS

A single institution analysis of age-matched patients with non-communicating hydrocephalus treated with VPS or ETV over a 3-year period. Occipitofrontal circumference (OFC), milestone, shunt independence as well as complication profiles of patients were recorded and analysed. Mean follow-up period was 1.27 ± 0.19 years 95%CI). Data analysis were performed using SPSS version 15, Chicago, IL. Statistical tests were set at 95% significance level.

RESULTS

Fifty-five patients were enrolled, 25 patients had ETV, while 30 had VPS. Mean age was 2.3 ± 0.7 years (95% CI) with a range of 3 months to 4.5 years. Aqueductal stenosis was the most common indication. OFC profile decline was significant among the VPS group when compared with ETV group at 3 months follow-up (χ² = 7.59, df = 1, p < 0.05). There was no difference among the two treatment groups χ² = 2.47, df = 1, p > 0.05) in milestone profile. Thirteen percent of VPS, compared to (4%) ETV patients, had sepsis (χ² = 4.59, df = 1 p < 0.05). Ninety-two percent of ETV patients remained shunt free, while 80% of shunted patients achieved ETV independence. Two patients died among the VPS group compared to one patient in the ETV group.

CONCLUSION

VPS compared to ETV is associated with an earlier milestone and OFC response. ETV is associated with lower rates of sepsis and mortality.

Neurosurgical management of hydrocephalus by a general surgeon in an extremely low resource setting: initial experience in North Kivu province of Eastern Democratic Republic of Congo

PURPOSE

Evaluate the management of hydrocephalus in pediatric patients in the Eastern Democratic Republic of Congo by a general surgeon.

METHODS

Retrospective review of a single institution in the province of North Kivu. Patient charts and surgical notes were reviewed from 2003 to 2016.

RESULTS

116 procedures were performed for an average of 8.9 per year. 51.7% of surgeries were on female patients with an average age of 13.6 ± 22.7. The average distance traveled from home to hospital was 153.7 km but ranged from 5 to 1420 km. The majority of hydrocephalus was due to neonatal sepsis (57%); 33.6% were classified as congenital; 9.5% of cases followed myelomeningocele closure. 97.4% had a ventriculoperitoneal (VP) shunt placed. Endoscopic third ventriculostomy combined choroid plexus cauterization (ETV/CPC) was performed in 2.5% of patients. Shunt infection occurred in 9.5% of patients, shunt dysfunction or obstruction in 5.2% and shunt exteriorization in 1.7%; no complications occurred in patients who underwent ETV/CPC.

CONCLUSION

VP shunt is the predominant management for hydrocephalus in this environment with increasing use of ETV/CPC. Further research is needed to evaluate variability by etiology, short and long-term outcomes of procedures performed by neurosurgeons and general surgeons, and regional epidemiologic variability.

Global surgery for pediatric hydrocephalus in the developing world: a review of the history, challenges, and future directions

OBJECTIVE

Pediatric hydrocephalus is one of the most common neurosurgical conditions and is a major contributor to the global burden of surgically treatable diseases. Significant health disparities exist for the treatment of hydrocephalus in developing nations due to a combination of medical, environmental, and socioeconomic factors. This review aims to provide the international neurosurgery community with an overview of the current challenges and future directions of neurosurgical care for children with hydrocephalus in low-income countries.

METHODS

The authors conducted a literature review around the topic of pediatric hydrocephalus in the context of global surgery, the unique challenges to creating access to care in low-income countries, and current international efforts to address the problem.

RESULTS

Developing countries face the greatest burden of pediatric hydrocephalus due to high birth rates and greater risk of neonatal infections. This burden is related to more general global health challenges, including malnutrition, infectious diseases, maternal and perinatal risk factors, and education gaps. Unique challenges pertaining to the treatment of hydrocephalus in the developing world include a preponderance of postinfectious hydrocephalus, limited resources, and restricted access to neurosurgical care. In the 21st century, several organizations have established programs that provide hydrocephalus treatment and neurosurgical training in Africa, Central and South America, Haiti, and Southeast Asia. These international efforts have employed various models to achieve the goals of providing safe, sustainable, and cost-effective treatment.

CONCLUSIONS

Broader commitment from the pediatric neurosurgery community, increased funding, public education, surgeon training, and ongoing surgical innovation will be needed to meaningfully address the global burden of untreated hydrocephalus.