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The effect of bloodless pump prime on cerebral oxygenation in paediatric patients.

BACKGROUND: In paediatric patients, crystalloid prime for cardiopulmonary bypass (CPB) causes further haemodilution in comparison with blood-containing prime. Thus it may affect the cerebral oxygen supply/demand balance. The purpose of the study was to compare the effect of bloodless pump prime with that of blood-containing prime on cerebral oxygenation in children. METHODS: Thirty-six paediatric patients scheduled for elective repair of atrial or ventricular septal defect were enrolled. In Group C (n = 18), the CPB circuit was primed only with crystalloid. In Group B (n = 18), red blood cells were added to achieve a haematocrit (Hct) of 20% during CPB. The regional cerebral oxygen saturation (rSO(2)) value measured by near-infrared spectroscopy was compared between the two groups. RESULTS: In both groups, rSO(2) decreased below baseline at the start of CPB and during rewarming (P < 0.001, for both groups during each period). At the start of CPB, haemodilution was greater in Group C than in Group B (Hct 16.1 +/- 0.7% vs. 20.7 +/- 0.5%; P < 0.01), and there was a greater reduction in rSO(2) in Group C (49.0 +/- 5.4% vs. 59.2 +/- 7.0%; P < 0.01). During rewarming, rSO(2) was significantly lower in Group C than in Group B (57.8 +/- 5.3% vs. 62.8 +/- 6.2%; P < 0.01). CONCLUSIONS: In paediatric patients, the haemodilution associated with crystalloid priming causes a greater reduction in rSO(2) than with blood-containing prime at the starting period of CPB and the rewarming period.

Analysis of Variance↗

A phase 2 clinical trial of metformin as a treatment for non-diabetic paediatric non-alcoholic steatohepatitis.

BACKGROUND: Children with non-alcoholic steatohepatitis are insulin-resistant and metformin has been proposed as a potential therapy. However, paediatric safety and efficacy data are absent. AIM: To test the hypothesis that metformin therapy will safely improve markers of liver disease in paediatric non-alcoholic steatohepatitis. METHODS: Single-arm open-label pilot study of metformin 500 mg twice daily for 24 weeks in non-diabetic children with biopsy-proven non-alcoholic steatohepatitis. RESULTS: Ten obese children (mean body mass index 30.4) enrolled and completed the trial. Mean alanine aminotransferase and aspartate aminotransferase (AST) improved significantly (P < 0.01) from baseline (184, 114 U/L) to end of treatment (98, 68 U/L). Alanine aminotransferase normalized in 40% and AST normalized in 50% of subjects. Children demonstrated significant improvements in liver fat measured by magnetic resonance spectroscopy (30-23%, P < 0.01); insulin sensitivity measured by quantitative insulin sensitivity check index (0.294-0.310, P < 0.05); and quality of life measured by pediatric quality of life inventory 4.0 (69-81, P < 0.01). CONCLUSION: Open-label treatment with metformin for 24 weeks was notable for improvement in liver chemistry, liver fat, insulin sensitivity and quality of life. A large randomized-controlled trial is needed to definitively determine the efficacy of metformin for paediatric non-alcoholic steatohepatitis.

Adolescent↗

Assessment of a hygroscopic heat and moisture exchanger for paediatric use.

A laboratory study of a widely available heat and moisture exchanger marketed for paediatric use was undertaken. The deadspace, measured by volume displacement, was 12 ml, similar to that of a standard catheter mount for paediatric use. Pressure drop across the device was measured at several different flows in five samples of the device in both the dry and wet state. Calculated resistance proved to be markedly lower when compared with that of other anaesthetic equipment such as tracheal tubes, and with similar humidification devices for paediatric use.

Anesthesiology↗

A comparison of the nasal mask and the nasopharyngeal airway in paediatric chair dental anaesthesia.

This study compared the quality of anaesthesia and surgical access afforded by two techniques for the administration of anaesthesia during paediatric chair dental procedures. A total of 50 ASA 1 paediatric day case patients were randomly assigned to receive anaesthesia through either the traditional Goldman nasal mask or through a nasopharyngeal airway. Patients in the nasal mask group were judged to have significantly worse airway patency (p = 0.0001) and significantly more episodes of airway obstruction (14 vs. 4; p = 0.0032) than those in the nasopharyngeal airway group. Anaesthetic, surgical and oxygen saturation data did not differ significantly between the two groups. Operating conditions were universally graded as excellent in the nasopharyngeal airway group, while those in the nasal mask group were graded as excellent/good in only 79% of cases (p < 0.0001). These results suggest that better quality anaesthesia and operating conditions can be achieved by using a nasopharyngeal airway rather than the traditional nasal mask for the administration of anaesthesia to paediatric chair dental patients.

Adolescent↗

Outer diameter and shape of paediatric tracheal tube cuffs at higher inflation pressures.

Cuffed tracheal tubes are becoming increasingly popular in paediatric anaesthesia and intensive care medicine. To avoid cuff related complications and airway morbidity, a thorough understanding of cuff volume/pressure behaviour and management is required. In this study, the outer cuff diameter and form stability of the cuff at high cuff pressure were assessed in a series of different paediatric cuffed tracheal tubes with internal diameter of between 3.0 and 5.0 mm. The main findings were that small amounts of inflated air led to a rapid increase in cuff pressure and volume and that the outer cuff diameters increased to 2-2.5 times the age-corresponding internal tracheal diameter following inadvertent syringe inflation. Careful cuff inflation under cuff pressure monitoring and/or automatic cuff pressure release is recommended in paediatric tracheal tube cuffs to prevent airway damage caused by manual inflation, pilot balloon compression and nitrous oxide diffusion.

Air Pressure↗

Comparison of a dedicated children's seizure clinic to mixed general paediatric clinics.

BACKGROUND: In the light of recent recommendations regarding the current management of children with possible epilepsy in the UK, different models of care are compared using an existing validated audit tool. METHODS: The initial clinical assessment process, investigation, management and communication regarding children referred with suspected epilepsy to general paediatric clinics or a paediatric seizure clinic was compared using the British Paediatric Neurology Association (BPNA) audit tool. Results Ninety-three children were included in the comparison. The history and description of the episodes was better documented in the Seizure Clinic (SC). Children's early development (79% vs. 50%) and school performance (86% vs. 42%) were better documented in the SC. Documentation of possible side effects relating to newly prescribed anti-epileptic drugs was poor in both groups (33% vs. 15%). CONCLUSIONS: Differences between models of epilepsy care can be detected using audit tools although there are some methodological limitations of this particular study. Future similar studies as well as informing local practice can add to the debate on the appropriate way forward in improving the care for children with epilepsy.

Anticonvulsants↗

Final adult height and body mass index after cure of paediatric Cushing's disease.

OBJECTIVE: Linear growth data after cure of paediatric Cushing's disease (CD) have been reported infrequently. We evaluated final adult height (FH) and body mass index (BMI) in a cohort of paediatric patients treated successfully for CD. PATIENTS AND METHODS: Fourteen patients (10 male, age range 6.4-16.6 years) fulfilled the diagnostic criteria for CD. All had had transsphenoidal surgery (TSS), combined with pituitary irradiation (RT) (45 Gy in 25 fractions) in six. All were cured (post-TSS cortisol < 50 nmol/l or mean cortisol post-RT < 150 nmol/l). Subjects analysed had bone ages at diagnosis of < 15 'years' (male) and < 13 'years' (female). RESULTS: At diagnosis, height SDS was [mean (range)]-2.5 (-4.2 to -0.8) and body mass index (BMI) SDS +2.7 (0.8-5.1). Following cure, 13 patients had GH deficiency (peak GH < 20 mU/l) and were treated with hGH (+ GnRH analogue in four). Height SDS at FH (n = 10) or latest assessment (n = 4) was -1.3 (-3.9-0.2) and increased compared to diagnosis (P < 0.01). The difference between final or latest height SDS and target height SDS was -1.2 (-3.3-0.5), that is less (P < 0.01) than the difference between the height SDS at diagnosis and target height SDS of -2.4 (-3.9 to -0.5). At final height or latest assessment, BMI SDS was +1.7 (0.4-6.2), being decreased compared to diagnosis (P < 0.05) but greater than the normal population (P < 0.01). CONCLUSION: Catch-up growth was demonstrated in paediatric patients cured from CD, with the majority achieving FH within target height range. Early diagnosis and treatment of GH deficiency is recommended to achieve optimal long-term growth. Excess adiposity remains a potential long-term complication.

Adolescent↗

Inverse correlation between CD4+ regulatory T-cell population and autoantibody levels in paediatric patients with systemic lupus erythematosus.

CD4(+) CD25(+) regulatory T cells (Tregs) are critical in maintaining self-tolerance and preventing organ-specific autoimmunity. Their role in paediatric systemic lupus erythematosus (SLE), an autoimmune disease characterized by inappropriate regulation of hyperactivated B and T cells, has not been clearly defined. Using flow cytometry to determine cell populations and real-time polymerase chain reaction to assay mRNA expression for FOXP3, CTLA-4, and GITR, we characterized CD4(+) CD25(+) T cells in paediatric SLE patients and healthy subjects. The frequency of CD4(+) CD25(+) Tregs was significantly decreased in patients with active SLE compared with patients with inactive SLE and with controls (7.27% +/- 2.50%, 9.59% +/- 2.80% and 9.78% +/- 2.11%, respectively; P = 0.027 and P < 0.001, respectively), and was inversely correlated with disease activity, as assessed with the Systemic Lupus Erythematosus Disease Activity Index 2000 scores (r = -0.59, P = 0.001) and serum anti-double-stranded DNA levels (r = -0.65, P < 0.001). Our preliminary investigations found elevated surface expression of GITR in CD4(+) CD25(+) T cells, elevated mRNA expression of CTLA-4 in CD4(+) T cells and higher amounts of mRNA expression for FOXP3 in CD4(+) cells in patients with active SLE compared with patients with inactive disease and controls. We demonstrated reduced CD4(+) CD25(+) Treg levels were inversely correlated with disease activity, indicating a defective Treg population in paediatric SLE patients. The differences in the expression of FOXP3, CTLA-4 and GITR imply the possible role of CD4(+) Tregs in the pathogenesis of SLE.

Adolescent↗

Attitudes towards the use of hand over mouth (HOM) and physical restraint amongst paediatric specialist practitioners in the UK.

PURPOSE: To assess the views of paediatric specialist dental practitioners in the United Kingdom of the use of the hand over mouth technique and physical restraint. METHODS: Questionnaire survey of all specialist dental practitioners in paediatric dentistry in the United Kingdom (n = 216). Replies were received from 179 individuals (82.8%). RESULTS: The majority of the sample (over 80%) described HOM as having three components, broadly mirroring the description of the technique in clinical textbooks. Approximately 60% of the respondents reported that HOM should never be used (106 individuals, 59.2%). Those who endorsed the use of HOM suggested it should be used with cases of hysterical, tantrum behaviour (57 respondents, 32%). The use of physical restraint was endorsed for certain disabled patients by 110 individuals (62%); for very young patients by 69 respondents (39%); premedicated patients by 35 respondents (20%); physically resistive patients by 25 respondents (14%). Forty-three respondents (24%) felt there were no psychological consequences of the use of HOM or physical restraint; 91 (51%) felt that HOM would result in the child fearing dental treatment. CONCLUSIONS: Specialist paediatric dental practitioners in the UK are familiar with the technique of HOM although they also feel that this technique should never be used. A large proportion of practitioners felt that the use of physical restraint was appropriate with certain disabled patients. The most commonly anticipated psychological sequeala which may accompany the use of these techniques was subsequent fear of dental treatment.

Attitude of Health Personnel↗

Paediatric dentistry experience of the first cohort of students to graduate from Dublin Dental School and Hospital under the new curriculum.

AIM: To assess undergraduate clinical experience in Paediatric Dentistry in students graduating under a new curriculum. METHODS: An audit using logbooks completed by 34 students for all patients for whom they had provided treatment in the university paediatric dentistry clinic. RESULTS: A total of 177 child patients had received treatment from the students, age range 2-8 years. Students had performed an average of 13 restorative techniques. Sixty-eight percent had provided stainless steel crowns and 71% at least one pulpotomy for a primary tooth. All students had provided fissure sealants. Eighteen had carried out extractions and 8 had provided treatment for fractured incisors on this clinic. CONCLUSIONS: The cohort of students included had a wide range of experience of paediatric dentistry which compared favourably with accepted guidelines. A relative lack of experience of dental extractions currently remains a problem.

Child↗

Parents' intentions to use paediatric nurse practitioner services in an emergency department.

AIM: This paper reports on a study investigating the factors which influence parental intent to use the services of a paediatric nurse practitioner in an emergency department. BACKGROUND: Research has shown that nurse practitioners provide quality care to paediatric and adult primary care and non-urgent emergency patients. Although there are studies that assess patient satisfaction with nurse practitioner care, there are few that report on what factors initially influence the public to use these services. No studies have examined the factors that affect parental decision-making to access nurse practitioner care in emergency settings for their children. METHODS: A questionnaire was completed by 100 parents who visited a tertiary paediatric emergency department for their child's non-urgent emergency care needs. Information captured included demographic variables, role responsibility tasks that parents would be willing to have a nurse practitioner provide, and parents' perceptions of the characteristics of the nurse practitioner role. Descriptive statistics and logistic regression were used to analyse the demographic data, percentiles were compiled for the role responsibility tasks, and logistic regression was used to analyse parents' perceptions of the characteristics of the nurse practitioner role. The data were collected in 2002. RESULTS: Eighty-three per cent of parents indicated their intention to access nurse practitioner services for a variety of childhood symptoms. Logistic regression revealed that the compatibility of nurse practitioner services with parents' beliefs and needs was the most statistically significant (P < 0.05) independent variable predicting parental intent to use these services. Demographic variables did not have a statistically significant influence. CONCLUSIONS: The public does not seem to understand fully the scope of nursing practice, and this is a concern if people are to feel comfortable with expanded roles for nurses. Thus, the public should be given information that not only describes the role of nurse practitioners, but also includes facts about the scope of practice of Registered Nurses as this may be helpful in producing a favourable attitude towards nurse practitioner care.

Adolescent↗

Hospital staff perceptions of parental involvement in paediatric hospital care.

AIM: This paper reports a study of hospital staff perceptions of parental involvement in children's hospital care. BACKGROUND: Previous research has shown that parents are expected and encouraged by hospital staff to be actively involved in the care of their hospitalized children. At the same time, parents have expressed a need for improved communication with paediatric hospital staff to clarify both parental and staff expectations and preferences about this involvement. Few studies, however, have studied hospital staff perceptions of parental involvement in the care of hospitalized children and their implications for clinical work. METHODS: A cross-sectional questionnaire study was conducted among paediatric hospital staff in October of 2003. Questionnaires were distributed to a total of 338 staff, including all physicians, Registered Nurses and nursing auxiliaries working on oncology, surgery and neurology units in three university children's hospitals in Sweden. RESULTS: A total of 207 questionnaires were returned, yielding a response rate of 61%. Exploratory and confirmatory factor analyses of the 26-item questionnaire resulted in the creation of two indices, Work Routines and Work Strain. Oncology staff reported having better work routines for involving parents in their children's care and they experienced less strain from parental demands compared with staff on other paediatric units. Staff perceptions and workplace routines regarding parental involvement did not differ statistically significantly by profession or by length of work experience. CONCLUSION: Staff perceptions of parental involvement may be related to clinical specialty. Oncology units may find it easier to establish routines for parental involvement, thereby experiencing less work strain in their interactions with parents. There is a need to further study staff perceptions of parental involvement and their implications for the staff work situation in both Sweden and other countries.

Adult↗

Pharmacokinetics and safety of prochlorperazine in paediatric patients receiving cancer chemotherapy.

Nausea and vomiting are common clinical problems in patients receiving cancer chemotherapy. Metoclopramide is often used but frequently causes extrapyramidal reactions. As an alternative, prochlorperazine is prescribed but no data on its pharmacokinetics in paediatric patients are available to guide the choice of suitable dosages. The primary objective of this study was to evaluate the pharmacokinetics and safety of intravenous prochlorperazine in paediatric patients receiving cancer chemotherapy. Eleven patients (ages 1-9 years) who received high doses of cisplatin or cyclophosphamide were given three to four intermittent doses of 0.2 mg/kg prochlorperazine i.v. over a period of 6-9 h. Multiple blood samples were collected and prochlorperazine was quantified by a specific gas-liquid chromatographic method. The peak serum concentrations ranged from 402 to 5,608 ng/ml. The total clearance and elimination half-life ranged from 0.03 to 0.28 (mean: 0.12) litre/kg/h, and from 1.2 to 15.5 (mean: 5.6) h, respectively. No adverse effects were observed in our patients. Three patients had uncontrolled episodes of vomiting during prochlorperazine therapy. These data suggest: (i) that there was a substantial interpatient variability in prochlorperazine pharmacokinetics thus the dose requirement differed among patients; and (ii) that prochlorperazine appeared safe at the doses used but higher doses may be required to control nausea and vomiting in some paediatric patients receiving high-dose cisplatin or cyclophosphamide therapy.

Adolescent↗

A retrospective drug utilization evaluation of vancomycin usage in paediatric patients.

OBJECTIVE: To evaluate the appropriateness of use of vancomycin in paediatric patients at KK Women's and Children's Hospital, the major paediatric hospital in Singapore to identify potential problems in prescribing practices that may necessitate intervention to optimize vancomycin usage. METHODS: A retrospective drug utilization evaluation was performed for paediatric patients who received intravenous vancomycin from 1 June 1998 to 31 June 1999. The outcome measures were consistency of vancomycin indication with recommended guidelines, dosing regimens, microbiological data, monitoring of serum drug levels, renal function, clinical outcomes and adverse drug reactions (ADRs). RESULTS: A total of 96 cases was available for evaluation. Sixty-two (64.6%) courses of vancomycin were consistent with guidelines for indication of therapy. Eighty-six (89.6%) of the dosing regimen were consistent. All infusion times that were recorded (56.3%) were consistent with criteria. Of the patients treated with vancomycin for more than 1 day, peak and/or trough serum vancomycin levels were ordered for 70 cases. Of the 56 cases with paired levels ordered, 46 cases had at least one level that fell outside the therapeutic range. Nineteen (19.8%) cases of ADRs were documented. Fifty-eight (60.4%) cases received concurrent nephrotoxic drugs. However, a substantial portion of vancomycin courses were apparently not prescribed for appropriate indications, and there was poor recording of vancomycin administration information and sampling time. CONCLUSION: The majority of dosing regimens of vancomycin was consistent with guideline criteria. The most evident problem was the sub-optimal use of the monitoring of vancomycin serum levels. The information derived from this study may be used as a for further study and for the development of strategies for optimize vancomycin usage.

Adolescent↗

Pharmacokinetics of gabapentin in paediatric patients with uncontrolled seizures.

PURPOSE: The pharmacokinetics of gabapentin in paediatric patients with uncontrolled seizures was studied. METHODS: Thirteen paediatric patients (mean age: 9.4 years) with uncontrolled partial seizures were included. Patients received gabapentin orally until doses were individualized to 9.6-39.8 mg/kg/day. Blood samples were obtained just prior to the dose and over 8 h after gabapentin was administered in the fasting state. The plasma concentration of gabapentin was measured by a high-performance liquid chromatography assay. Pharmacokinetic parameters for gabapentin were determined by non-compartment methods using multivariate regression analysis. RESULTS: Data from nine patients were suitable for pharmacokinetic analysis. The C(max) from 0.9 to 5.8 microg/mL (mean: 2.6 +/- 1.7 microg/mL) and T(max) from 0.5 to 2.0 h (mean: 1.6 +/- 1.0 h). The apparent clearance (Cl/F) ranged from 0.12 to 1.12 L/h/kg (mean: 0.50 +/- 0.29 L/h/kg), and the elimination half-life from 3.2 to 12.2 h (mean: 5.5 +/- 0.8 h). Five patients experienced moderate (n = 4) to severe (n = 1) aggressive behaviour and another gained weight on gabapentin. CONCLUSIONS: Our data suggests that gabapentin pharmacokinetics can vary substantially among paediatric patients. Gabapentin was well tolerated in patients with uncontrolled partial seizures up to 6 months of therapy.

Adolescent↗

An evaluation of antimicrobial prophylaxis in paediatric surgery and its financial implication.

OBJECTIVE: To assess the appropriateness of use of antimicrobial prophylaxis in paediatric surgery in Singapore. METHODS: A prospective evaluation of the use of antimicrobial prophylaxis in paediatric patients undergoing surgery in KK Hospital, Singapore was carried out from September and December 2001. Process measures for the study included adherence to local or international guidelines, choice and dose of antimicrobial agent and timing and duration of prophylaxis. Outcome measures included surgical site and other related infections. A cost analysis was also performed to look at the extra expenditure due to any excessive use of antimicrobials. RESULTS: A total of 171 patients with a mean age of 5.7 years (SD=4.5) were included in the study. Among the 117 (68.4%) elective and 54 (31.6%) emergency procedures, 22 cases (12.8%) were fully compliant with the guidelines. The most frequently encountered non-compliance types were unnecessary prolongation of prophylaxis (54.4%), inappropriate choice of antibiotics (42.7%) and overdose of antibiotics (26.3%). The estimated extra cost to patients for the study period was Sing$13,879.41 (US 8164.36). CONCLUSION: The results showed a significantly high level of inappropriate use of antimicrobial prophylaxis in paediatric surgery in Singapore. However, when the individual factors such as appropriate choice of antibiotics, appropriate timing and duration were considered, the situation was very similar to the results obtained from overseas studies.

Antibiotic Prophylaxis↗

Is fibre supplementation in paediatric sip feeds beneficial?

The usefulness of a paediatric fibre containing sip feeds specifically formulated for paediatrics has not been evaluated. In an open, prospective, parallel study the efficacy, safety and tolerance of a paediatric fibre-containing sip feed designed for children weighing 8-20 kg (1-6 years) was compared with a fibre-free sip feed in 60 children with chronic illness. The subjects either received a trial sip feed containing 150 kcal (100 ml)(-1) and 2.0 g (100 ml)(-1) of fibre or a fibre-free equivalent control sip feed for 12 weeks. Blood biochemistry, haematology, anthropometry, tolerance and food intake data were estimated during week 1 and 12. The fibre intake was higher (P < 0.0001) and laxative usage decreased in the fibre-containing sip feed group. The sip feed provided almost 50% of fibre intake in the trial group. There were no differences in sip feed tolerance, anthropometry, nutritional biochemistry or haematology between the two groups. Sip feeds provide an important source of fibre for sick children with normal gut function requiring nutritional support.

Anthropometry↗

Televised paediatric consultations: a student evaluation of a multipurpose learning strategy.

Since 1984, each student in the sixth-year paediatric rotation in the Department of Paediatrics and Child Health at the University of the Witwatersrand has been videotaped while undertaking a comprehensive paediatric primary care consultation. Video replay of the consultation by each individual student was evaluated by the student together with medical and social work tutors. This incorporated psychosocial aspects, communication skills, doctor-mother-child interactions, as well as essential medical content, clinical examination techniques, and management strategies. The student was expected to provide comprehensive health care, viz. dealing with the presenting health problems, identifying any possible hidden agenda, giving due attention to nutrition, immunization, development, optimal use of available records, health surveillance and appropriate education. This teaching programme was introduced in 1984. In 1988, 68 consecutive final-year medical students completed an anonymous Likert-type evaluation form scoring their perceived learning. They affirmed that the use of television in medical education provides a unique multipurpose learning strategy and in particular enhances awareness of self and of patient/family needs. The time, cost and effort invested in this programme are considered justified.

Clinical Competence↗