Publications by authors named "Steen Henneberg"

Background: Minor but painful medical procedures are often handled at the operating room. If safe and effective treatment options are available many procedures may be performed outside of the operating room.

Objective(s): The objective of this study is to assess the adverse events of intranasal s-ketamine and/or sufentanil alone or as part of a multimodal analgesic regime for medical procedures outside of the operating room.

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Introduction: Oral mucositis is a painful side effect to chemotherapy. Orally applied opioids may offer analgesia with fewer side effects than systemic opioids.

Methods: A randomized trial comparing the analgesic effect of a morphine oromucosal solution (OM) to placebo and a positive control group receiving intravenous (IV) morphine as an add-on treatment to morphine patient-controlled analgesia (PCA) in a mixed population of paediatric and adult haematology patients.

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Background: Clonidine is used off-label in children but only limited pediatric pharmacokinetic data are available for intravenously administered clonidine.

Objectives: To determine pharmacokinetic parameter estimates of clonidine in healthy children undergoing surgery and to investigate age-related differences. Furthermore, to investigate possible pharmacokinetic differences of clonidine between this group of children and a cohort with cardiac diseases.

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Background: Postoperative agitation is a frequent and stressful condition for a child, their family, and their health-care providers, and prevention would be of benefit. We aimed to assess the effects of intravenous clonidine administered intraoperatively on the incidence of postoperative agitation, pain, and adverse events.

Methods: We did this randomised, placebo-controlled, double-blind trial (PREVENT AGITATION) at one tertiary-level hospital and two urban-district hospitals in Denmark.

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Background And Aims: The 2 currently available indirect calorimeters, CCM Express Indirect Calorimeter (MedGraphics, St Paul, MN) and Quark RMR ICU Indirect Calorimeter (COSMED, Rome, Italy), have not been validated against a gold standard in mechanically ventilated patients. Our aim was to do so using a gold-standard, modified Tissot bell-spirometer method in mechanically ventilated patients who were hemodynamically, respiratory, and metabolically stable.

Methods: We studied 30 patients undergoing general anesthesia and major gynecological surgery.

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Introduction: Post-operative agitation (PA) is a common problem (20-70%) in children anaesthetised with sevoflur-ane. Clonidine is widely used off-label in children for several indications, including PA, but the current level of evidence is limited. Our aim is to investigate the impact of prophylactic intravenous (IV) clonidine administered at the end of surgery on the incidence and degree of PA.

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Animal studies (including non-human primates) have shown that most general anaesthetics cause enhanced neuroapoptosis with subsequent long-term neurocognitive deficits later in life. Some human cohort studies have indicated an association between anaesthesia/surgery and adverse neurocognitive outcome whereas other studies have not. Overall, the data do not justify any change in paediatric anaesthetic clinical practice.

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Background: Few human cohort studies on anesthesia-related neurotoxicity and the developing brain have focused on and compared specific surgeries and conditions. These studies cannot disentangle the effects of anesthesia from those of the surgery and underlying conditions. This study aimed at assessing the impact of specific neurosurgical conditions and procedures in infancy on mortality and academic achievements in adolescence.

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Background: Children being cared for in hospital often undergo multiple diagnostic and therapeutic procedures. Procedure-related pain, anxiety, and distress may consequently place a significant burden on the children. Although standards for pain management exist, procedure-related pain remains inadequately treated.

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Background: The management of procedural pain in children ranges from physical restraint to pharmacological interventions. Pediatric formulations that permit accurate dosing, are accepted by children and a have a rapid onset of analgesia are lacking.

Objectives: To investigate a pediatric formulation of intranasal sufentanil 0.

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Background: Immature animals exposed to anesthetics display apoptotic neurodegeneration with subsequent long-term cognitive dysfunctions. Young age at anesthetic exposure is believed to be critical, but human studies are scarce. This study investigated the association between exposure to surgery and anesthesia for pyloric stenosis (PS) before 3 months of age and subsequent educational outcome in adolescence.

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Background: A high perioperative inspiratory oxygen fraction (FiO2) may reduce the frequency of surgical site infection. Perioperative atelectasis is caused by absorption, compression and reduced function of surfactant. It is well accepted, that ventilation with 100% oxygen for only a few minutes is associated with significant formation of atelectasis.

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Context: Systemic opioids for painful chemotherapy-induced oral mucositis in children often result in unsatisfactory pain relief and a high frequency of side effects. Opioids applied topically can produce analgesia by binding to opioid receptors on peripheral terminals of sensory neurons. These receptors are upregulated during inflammation, for example, in oral mucositis.

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Breastfeeding women who undergo general anaesthesia often receive conflicting recommendations regarding the need to discard their milk before resumption of breastfeeding. This narrative review describes the sparse evidence to support the current practice of discarding milk as advocated by many physicians. However, individual drugs such as diazepam, morphine, codeine and pethidine should be avoided when possible and otherwise only be administered as single doses with observation of the child.

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Nerve blocks play an increasingly important role in pediatric regional anaesthesia. The benefits are numerous compared to standard pain regimens. The use of ultrasound (US) for nerve blocks lowers the volume of local anaesthetics applied, shortens the on-set time and results in higher success rates.

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Background: Although animal studies have indicated that general anesthetics may result in widespread apoptotic neurodegeneration and neurocognitive impairment in the developing brain, results from human studies are scarce. We investigated the association between exposure to surgery and anesthesia for inguinal hernia repair in infancy and subsequent academic performance.

Methods: Using Danish birth cohorts from 1986-1990, we compared the academic performance of all children who had undergone inguinal hernia repair in infancy to a randomly selected, age-matched 5% population sample.

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Context: Use of 80% oxygen during surgery has been suggested to reduce the risk of surgical wound infections, but this effect has not been consistently identified. The effect of 80% oxygen on pulmonary complications has not been well defined.

Objective: To assess whether use of 80% oxygen reduces the frequency of surgical site infection without increasing the frequency of pulmonary complications in patients undergoing abdominal surgery.

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Background: A high perioperative inspiratory oxygen fraction may reduce the risk of surgical site infections, as bacterial eradication by neutrophils depends on wound oxygen tension. Two trials have shown that a high perioperative inspiratory oxygen fraction (FiO(2) = 0.80) significantly reduced risk of surgical site infections after elective colorectal surgery, but a third trial was stopped early because the frequency of surgical site infections was more than doubled in the group receiving FiO(2) = 0.

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Reflex dystrophy or Complex Regional Pain Syndrome (CRPS) is a neuropathic pain condition in a limb after a trauma. Pain is not limited to one or more dermatomes and there is a disproportion between the intensity of the pain and the eliciting trauma. Among physicians in Denmark it is not common knowledge that CRPS also affects children.

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Background: The extraction of the middle latency auditory evoked potentials (MLAEP) is usually done by moving time averaging (MTA) over many sweeps (often 250-1,000), which could produce a delay of more than 1 min. This problem was addressed by applying an autoregressive model with exogenous input (ARX) that enables extraction of the auditory evoked potentials (AEP) within 15 sweeps. The objective of this study was to show that an AEP could be extracted faster by ARX than by MTA and with the same reliability.

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