Clinical risk index for babies (CRIB) II score as a predictor of neonatal mortality among low birth weight babies at Kenyatta National Hospital

BACKGROUND

Neonatal deaths, especially among the Low Birth Weight (LBW) babies, are of major concern in the Newborn Unit (NBU) of Kenyatta National Hospital (KNH). Several instruments have been developed to predict initial mortality risk among the LBW babies. Among them is the scoring system Clinical Risk Index for Babies also known as CRIB II score.

OBJECTIVE

To evaluate the use of CRIB II score as a tool to predict the risk for neonatal mortality among the LBW babies at KNH.

DESIGN

A prospective cohort study.

SETTING

Newborn Unit of Kenyatta National Hospital.

SUBJECT

A total sample of 135 low birthweight babies were followed up from admission till discharge, the 28th day of life or death whichever came first.

RESULTS

One hundred and thirty five newborns were enrolled into the study. Birth weight ranged from 600-2500 g, with a median of 1600g. Total CRIB II score ranged from 1-15, with a median of 5.5. Gestational age ranged from 26 - 38 weeks. Total mortality was 45.9%. Birth weight < 1500 g, gestational age < 30 weeks, base excess <-12 mmol/l, temperature at admission > 37.5 or < 35 (all components of CRIB II) and total CRIB II score of > 4 were all found to be significantly associated with hospital neonatal mortality. Using a cut off point of 4, CRIB II score was found to have a sensitivity of 80.6%, specificity of 75.3%, and a predictive value of 77.7% compared to 72.5, 71.2, and 71.8% respectively for birthweight. Gestational age was found to have even lower figures; 56, 75 and 66% for sensitivity, specificity and predictive values respectively.

CONCLUSION

CRIB II score of > 4 was found to have better prediction for mortality among the LBW babies at KNH-NBU compared to the traditionally used predictors and can be used to prioritise care for such neonates for better outcome.

Neonatal bacterial meningitis at the newborn unit of Kenyatta National Hospital

BACKGROUND

Meningitis occurs in up to one third of neonates with septicaemia. Diagnosis is difficult due to its non-specificity of signs and symptoms. While neonatal septicaemia is a common problem at Kenyatta National Hospital (KNH), there are no recent data on the incidence and clinical characteristics of neonatal meningitis at the hospital.

OBJECTIVE

To evaluate the prevalence and the bacterial aetiology of meningitis in neonates at the Newborn Unit (NBU) of KNH.

DESIGN

Descriptive cross-sectional study.

SETTING

Newborn Unit of Kenyatta National Hospital, Nairobi, Kenya.

SUBJECTS AND METHODS

Lumbar punctures were performed on eighty-four neonates with suspected sepsis based on specified clinical criteria. Cases were defined as meningitis if the cerebrospinal fluid (CSF) was positive for bacteria by Gram stain, aerobic bacterial culture or latex particle agglutination assay.

RESULTS

The prevalence of meningitis amongst cases of suspected sepsis was 17.9%. The male:female ratio was 1.5:1 mean birth weight 2116.7 grams (1682.2-2551.2) mean gestational age 35.7 weeks (32.6-38.8) and the mean postnatal age was 4.1 days (2.7-5.4) with none of the parameters being significantly different from those without meningitis. Feed intolerance and lethargy were the most common clinical features, present in 73.3% and 60% of patients with meningitis respectively. Neonates with meningitis had a higher mean CSF protein value (2.67 g/L vs 1.97 g/L, p=0.367) and a significantly higher mean CSF white cell count (21 cells/mL vs 7 cells/mL, p=0.001). The most common aetiological agents were Escherichia coli (46.7%). Group B. Streptococci (26.7%) and Klebsiella pneumoniae (13.3%). Most blood and CSF isolates were resistant to ampicillin and gentamicin but showed good in-vitro sensitivities to amikacin, cefuroxime and the third generation cephalosporins (ceftriaxone, ceftazidime and cefotaxime). Blood cultures were positive in only 53.3% of neonates with meningitis.

CONCLUSION

Neonatal bacterial meningitis is an important clinical problem at KNH with a prevalence of 17.9% amongst cases of suspected sepsis. E. coli and Group B Streptococci were the most common aetiological pathogens. Blood cultures were negative in almost half of the patients with meningitis. Resistance to the commonly employed first-line antibiotics (penicillin and gentamicin) is high and a change of empirical antibiotic use for neonates with suspected sepsis is recommended.

Growth and development of abandoned babies in institutional care in Nairobi

OBJECTIVE

To determine the pattern of growth and development of institutionalised infants and to compare the outcome with that of infants living with their biological mothers.

DESIGN

A cross-sectional survey.

SETTING

Seven children's homes; Kenyatta National Hospital's New Born Unit and Well Baby Clinics in Nairobi, Kenya.

PARTICIPANTS

Eighty-two abandoned babies who fulfilled the selection criteria were recruited and for each abandoned baby two mothered babies matched for age and sex were selected from the well baby clinics.

MAIN OUTCOME MEASURES

Anthropometric measures of weight, length, head circumference and left mid arm circumference (LUMAC) were taken and the mean values and Z scores determined to demonstrate growth pattern and nutritional status of the babies. The Revised Denver Development Screening Test (RDDST) was used to assess the development pattern of infants.

RESULTS

Seventy per cent of infants were below six months old and 73% were abandoned within the first week of life. Abandoned babies were significantly thinner with the mean LUMAC of 10.8 cm versus 12.3 cm (p = 0.02) Institutionalised babies were significantly wasted (p = 0.00001) and stunted (p = 0.00001). Abandoned babies were significantly delayed in development (p < 0.0001). In all the four sectors tested for, institutionalised babies showed significant delay, p < 0.0001 in each sector.

CONCLUSION

This study demonstrates that infants under institutional care have poorer growth and development compared to mothered infants.

Incidence of rickets of prematurity at Kenyatta National Hospital, Nairobi

BACKGROUND

Reports of osteopaenia/rickets of prematurity are on the increase due to improved survival rates of low birthweight infants.

OBJECTIVE

To establish the incidence of rickets of prematurity by the age of six months in premature infants born at Kenyatta National Hospital, Nairobi.

DESIGN

Prospective cohort study.

SETTING

Newborn unit and paediatric outpatient follow up clinic of Kenyatta National Hospital.

SUBJECTS

Successive surviving infants of birthweight less than 2000 g residents in Nairobi.

RESULTS

Incidence of rickets of prematurity by six months of age was 58.8%. Rickets appeared more commonly in male infants compared to female infants.

CONCLUSION

Rickets of prematurity is a common problem in the premature infants seen at Kenyatta National Hospital. Routine vitamin D supplements to premature infants in adequate doses of at least 400iu per day should be adopted in our centre.

Does the "Baby Cloche" heat shield keep low birth-weight infants warm?

To determine whether the "Baby Cloche" heat shield improves temperature control in low birth-weight infants we compared serial temperatures in 11 preterm infants nursed with or without the Cloche. Mean birth weights were 1490 and 1510 gm, mean weights at time of study 1680 and 1710 gm and mean postnatal age 20 and 27 days for study and control infants respectively. Serial measurements of rectal, abdominal skin, dorsum of the foot, Cloche wall and room temperature were recorded once or twice daily for 2 to 5 days. Mean rectal temperatures increased with increasing age from 35.3 in the first week of life to 37.0 degrees C by the third week (P less than 0.001). In infants nursed under the Cloche who were over 2 weeks of age mean rectal, abdominal and foot temperatures were 0.5, 0.6 and 1.6 degrees C higher (P less than 0.001); in younger infants there was no significant difference in any of the temperatures. Our findings suggest that the "Baby Cloche" improves temperature control in preterm infants over 1600 gm who are more than 2 weeks of age.