High-dose methylprednisolone and endothelial glycocalyx in paediatric heart surgery.

BACKGROUND: Corticosteroids are used in paediatric heart surgery to attenuate systemic inflammatory response. Glycocalyx regulates vascular permeability, shear stress and cell adhesion on the endothelium. Syndecan-1 serves as a biomarker of glycocalyx degradation. Hydrocortisone decreased endothelial glycocalyx degradation in an experimental model. Our hypothesis was that high-dose methylprednisolone decreases glycocalyx degradation as measured by plasma sydecan-1 concentration in children undergoing cardiac surgery. METHODS: Two double-blinded, randomized, placebo-controlled trials were conducted. In the first trial ('neonatal trial'), 40 neonates undergoing open heart surgery received either 30 mg/kg intravenous methylprednisolone (n = 20) or placebo (n = 20). In the second trial ('VSD trial'), 45 infants and very young children, undergoing ventricular or atrioventricular septal defect correction received one of the following: 30 mg/kg of methylprednisolone intravenously after anaesthesia induction (n = 15), 30 mg/kg methylprednisolone in the cardiopulmonary bypass prime solution (n = 15) or placebo (n = 15). Plasma syndecan-1 concentrations were measured. Results were expressed both as absolute concentrations and in relative concentrations as multiples of the baseline values of syndecan-1. RESULTS: There were no statistically significant differences between the neonate trial groups for absolute syndecan-1 concentrations. However, operative administration of methylprednisolone to neonates significantly reduced the relative increases of syndecan-1 at weaning from cardiopulmonary bypass (P = 0.008) and at 6 h post-operatively (P = 0.018). There were no statistically significant differences in absolute or relative increases of syndecan-1 between the VSD trial study groups. CONCLUSION: High-dose methylprednisolone reduces shedding of glycocalyx in neonates after complex cardiac surgery but not in older infants after repair of VSD/AVSD with shorter ischaemia times.

Intraosseous access in neonates and infants: risk of severe complications - a case report.

Gaining vascular access in a neonate during cardiopulmonary resuscitation is crucial and challenging. Intraosseous (IO) access can offer a fast and reliable method for achieving emergency access for fluids and drugs when venous access fails in a critically ill child. IO access can however result in rare, but serious adverse events including compartment syndrome and amputation. We describe a case resulting in leg amputation due to IO infusion in a neonate after resuscitation and therapeutic hypothermia. We compared 10 tibia X-rays in three age groups. The mean medullary diameter of the proximal tibia at the recommended site for IO access was 7 mm in neonate, 10 mm in 1- to 12-month-old infants, and 12 mm in 3- to 4-year-old children. This provides a narrow margin of safety for the correct positioning and the avoidance of dislodgement of the IO needle. The correct position of the IO needle should be confirmed by bone marrow aspiration and fluid bolus. Unnecessary touching of the IO needle after fixing it in place should be avoided by inserting a luer-lock catheter with a three-way stop-cock for IO drug and fluid administration. Regular observation of the circulation and possible swelling of the leg should be performed. The IO administration of inotropic infusions should also be avoided after the initial resuscitation phase. When treating with therapeutic hypothermia, it may be wise to remove the IO needle much earlier than the currently recommended 24 h because of the problems in peripheral circulation and its monitoring.

Drowning in children: Utstein style reporting and outcome.

BACKGROUND: We report the incidence and mortality of paediatric drowning incidents according to 'Utstein Style for Drowning' guidelines. METHODS: Retrospective study including all the drowned children under 16 years of age who were hospitalised or died with or without attempted cardiopulmonary resuscitation (CPR) between 1997 and 2007 in the province of Uusimaa, Finland. Survival rates provided at hospital discharge and after 1-year follow-up period are reported. RESULTS: A total of 58 drowned children were either admitted to the paediatric intensive care unit or died during the study period. The median (interquartile range) age was 5.9 (3.1, 7.8) years. The annual incidence of drowning was 1.9/100,000 and was highest, 2.8/100,000, in children aged between 1 and 4 years. The annual mortality rate was 0.9/100,000. Of all the 58 patients, 14 (24%) died at the scene, 22 (38.1%) before the hospital discharge, and 26 (45%) within the 1 year. The number of non-fatal drownings was 1.2-fold that of fatal drownings. The survival rate of the 26 patients for whom CPR was initiated by emergency medical service (EMS) personnel was 42% at hospital discharge, with the 1-year survival rate being 27%. CONCLUSIONS: The incidence of drowning in children and the survival rate of those children in whom CPR was initiated by EMS personnel was in line with the previously reported. However, the overall mortality rate in drowned children was higher than estimated in previous studies.

Levosimendan: current data, clinical use and future development.

Levosimendan is an inodilator indicated for the short-term treatment of acutely decompensated severe chronic heart failure, and in situations where conventional therapy is not considered adequate. The principal pharmacological effects of levosimendan are (a) increased cardiac contractility by calcium sensitisation of troponin C, (b) vasodilation, and (c) cardioprotection. These last two effects are related to the opening of sarcolemmal and mitochondrial potassium-ATP channels, respectively. Data from clinical trials indicate that levosimendan improves haemodynamics with no attendant significant increase in cardiac oxygen consumption and relieves symptoms of acute heart failure; these effects are not impaired or attenuated by the concomitant use of beta-blockers. Levosimendan also has favourable effects on neurohormone levels in heart failure patients. Levosimendan is generally well tolerated in acute heart failure patients: the most common adverse events encountered in this setting are hypotension, headache, atrial fibrillation, hypokalaemia and tachycardia. Levosimendan has also been studied in other therapeutic applications, particularly cardiac surgery - in which it has shown a range of beneficial haemodynamic and cardioprotective effects, and a favourable influence on clinical outcomes - and has been evaluated in repetitive dosing protocols in patients with advanced chronic heart failure. Levosimendan has shown preliminary positive effects in a range of conditions requiring inotropic support, including right ventricular failure, cardiogenic shock, septic shock, and Takotsubo cardiomyopathy.

The effect of tepid amino acid-enriched induction cardioplegia on the outcome of infants undergoing cardiac surgery.

BACKGROUND: Despite promising experimental results, no information has been published on the clinical effects of amino acid-enriched induction cardioplegic solution on outcome in children undergoing cardiac surgery. METHODS: This is a retrospective study of 185 consecutive patients younger than 12 months with one of the following defects undergoing open heart surgery: atrioventricular septal defect, transposition of the great arteries, tetralogy of Fallot or ventricular septal defect. Patients were divided into two groups according to the following myocardial protection approaches: tepid substrate-enriched induction cardioplegia followed by cold blood cardioplegia (n=113) or only cold blood induction cardioplegia (n=72). Patient allocation was determined by the anesthesiologist in charge of cardiopulmonary bypass (CPB). The primary outcome measure was postoperative myocardial injury assessed by troponin T level and inotrope score. RESULTS: Demographic data were similar for both groups. Cardioplegic induction had no overall effect for inotrope score (16.3 ± 9.2 vs.17.9 ± 10.0, p=0.276) or lactate release (1.8 ± 1.3 vs. 1.6 ± 0.8, p=0.110) on arrival to the paediatric intensive care unit. On the first postoperative day, there were no significant differences between the cardioplegia groups for inotrope score (13.7 ± 8.7 vs.14.3 ± 9.1, p=0.657), troponin T (2.4 ± 1.6 vs. 2.8 ± 2.7 µg/L, p=0.267), lactate (1.5 ± 2.0 vs. 1.5 ± 0.8, p=0.972), or any of the other clinical outcome measures. CONCLUSIONS: Compared to cold cardioplegia alone, the administration of tepid induction cardioplegia had no effect on the clinical outcome of infants who underwent cardiac surgery.

Health-related quality of life after a drowning incident as a child.

AIM OF THE STUDY: To describe health-related quality of life (HRQoL), quality-adjusted life years (QALYs) gained and school performance in subjects having received either bystander or emergency medical service personnel initiated cardiopulmonary resuscitation (CPR) after a drowning incident in childhood. MATERIALS AND METHODS: 64 children admitted to pediatric intensive care (PICU) after successful CPR between 1985 and 2007. Eleven died in the PICU, 9 other within 6 months. In 2009 all long-term survivors, except for two, lived at home. Of the 40 patients eligible for the study, 29 (73%) responded to a questionnaire. HRQoL was assessed with the generic 15D, or its versions for adolescents (16D) or children (17D), and compared to that of general population. These HRQoL scores, age-specific survival probabilities, and HRQoL scores of the general population were used in a Markov model to estimate the number of QALYs gained. RESULTS: Median age of the respondents was 17.3 (range: 3.0-28.4) years and 62% were male. At the time of drowning their median age had been 3.0 (range: 1.2-15.7) years. The drowning incident was associated with a significant loss in HRQoL in the oldest age group (total HRQoL total score 0.881 compared to 0.971 in the general population, P<0.01) but not in children (HRQoL score 0.944 vs. 0.938). When submersion time exceeded 10min mean HRQoL score was significantly lower than in patients with a shorter submersion (0.844 vs. 0.938, P=0.032). The mean undiscounted and discounted (at 3%) number of QALYs gained by treatment were 40.8 and 17.0, respectively. CONCLUSIONS: A good HRQoL will be achieved in the majority of patients surviving long-term after a drowning incident in childhood, although HRQoL is affected by the submersion time.

Outcome of drowned hypothermic children with cardiac arrest treated with cardiopulmonary bypass.

BACKGROUND: There is a lack of data on the outcome of cardiopulmonary bypass (CPB) rewarming of hypothermic children with cardiac arrest following drowning. AIM OF THE STUDY: To retrospectively analyze single-center outcome of drowning victims treated with CPB. MATERIALS AND METHODS: This retrospective study included all hypothermic drowning victims admitted to the Hospital for Children and Adolescents with attempted resuscitation on CPB between 1994 and 2008 inclusive. Median sternotomy and cannulation of the ascending aorta and the right atrium for CPB were performed on all victims. RESULTS: Nine hypothermic drowning victims, comprising five boys and four girls, with a median age of 3.8 years (range, 1.5-10 years). The median submersion time was 38 min (range, 5-75 min) and the median water temperature was 6.5 °C (range, 0.2-16.5 °C). The median core temperature was 21.9 °C (range 17.7-32.8 °C) at arrival to the hospital. All nine children were able to be weaned from CPB. Only one child, with mild to moderate neurological deficit, became a long-term survivor. She was slowly rewarmed up to 33 °C with CPB and kept in mild hypothermia for 48 h. CONCLUSIONS: Large numbers of submerged children can be primarily resuscitated with CPB. Unfortunately, many of them will decease from severe hypoxic brain injury. Slow rewarming with CPB may improve the likelihood of a better neurological outcome.

Intrathecal morphine provides effective and safe analgesia in children after cardiac surgery.

BACKGROUND: The purpose of this prospective, randomized, blinded to observer study was to assess the analgesic effect and safety of intrathecal morphine (ITM) in post-operative pain control in children after heart surgery with a sternotomy incision. METHODS: Eighty children, 3-55 kg in body weight, undergoing elective cardiac surgery with opioid-based anaesthesia were randomly divided into two treatment groups to receive either 20 micrograms/kg ITM at induction of anaesthesia or control. To standardize the protocol for administration of post-operative rescue intravenous morphine boluses and infusion (20-60 micrograms/kg/h), the Cardiac Analgesic Assessment Scale (CAAS) was used. RESULTS: Nine patients were excluded from the study after randomization. Thirty-five patients were enrolled to the ITM group and 36 to the control group. The groups were similar for demographics and intra-operative clinical characteristics. The mean time for the first intravenous morphine dose from ITM administration or equivalent time zero in the control group was significantly longer (P = 0.003) in the ITM group compared with the control group (12.3 vs. 8.7 h). Time from Paediatric Intensive Care Unit (PICU) admission to the start of intravenous morphine was also significantly longer (P = 0.01) in the ITM group (6.0 vs. 3.4 h). The total intravenous morphine consumption over the mean 19 post-operative hours was significantly lower (P = 0.03) in the ITM group. However, the use of ITM did not result in earlier extubation or earlier discharge from the PICU. Of the 35 patients who received ITM at induction of anesthesia, 20% (n = 7) did not require any additional morphine in the PICU compared with three out of 36 control group patients. This did not reach statistical significance. The incidence of adverse events was low in both groups. CONCLUSIONS: An ITM dose of 20 micrograms/kg had a significant (P = 0.03) intravenous morphine-sparing effect after cardiac surgery. Effective analgesia was observed for 12 h after administration of intrathecal morphine.

Does water temperature affect outcome of nearly drowned children.

The effect of water temperature on the outcome of nearly drowned children was studied retrospectively. All patients under 16 years of age, who required admission to the paediatric intensive care unit (PICU) or who died despite life support measures between January 1, 1985 and December 31, 1994 in Southern Finland, were included in the study. The authors created a Near Drowning Severity Index (NDSI) and an age-adjusted NDSIage as tools to evaluate the effect of submersion duration and water temperature on the outcome of nearly drowned children. The predictive performance of the NDSI and the NDSIage were compared with the duration of submersion to predict the outcome. Of the 48 patients 11 were female and 37 were male. Their ages ranged from 0.8 to 15 years and the median was 3.7 years. The submersion time ranged from 0.5 to 90 min and the median time was 6.3 min. The median temperature of water was 16 degrees C (range 0-37 degrees C). The NDSI had a sensitivity of 93.9% and specificity of 90.6% in predicting the outcome after submersion incidents. The inclusion of age (NDSIage) in the formula did not increase predictive performance of the NDSI. With a cut-off value of 10 min, the duration of submersion alone had a sensitivity of 96.6% and specificity of 89.5% in predicting the outcome. In conclusion the effect of a potentially beneficial rapid development of hypothermia by cold water on the outcome of nearly drowned children could not be proved.

The late outcome of femoral neck fractures.

The late outcome of 562 consecutive femoral neck fractures is presented; 396 were treated with a Thompson hemiarthroplasty, 121 by internal fixation, 4 by primary total hip replacement, and 41 were treated conservatively. Mortality during the first 30 days was 5%. The incidence of primary and secondary local complications after osteosynthesis was 25%. Further operations were carried out in 10% of the hemiarthroplasties. Seventy-eight patients were evaluated clinically and radiologically 10 years after this operation; 24 had been converted to total hip replacements, and in 23 of the remaining 54 the prosthesis appeared loose on radiographs. There was severe protrusion of the metal head in 25 cases. The clinical result was excellent or good in only 17 of 78 cases. We conclude that osteosynthesis or total hip replacement, rather than a Thompson hemiarthroplasty, should be considered for the treatment of femoral neck fractures if the patient is active and appears to have a life expectancy of several years.