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Biomedical subjects

Carl L von Baeyer

Publications and source records attributed to Carl L von Baeyer.

12 recordsLinked to original sources
PubMed2006

Systematic review of observational (behavioral) measures of pain for children and adolescents aged 3 to 18 years.

Observational (behavioral) scales of pain for children aged 3 to 18 years were systematically reviewed to identify those recommended as outcome measures in clinical trials. This review was commissioned by the Pediatric Initiative on Methods, Measurement, and Pain Assessment in Clinical Trials (www.immpact.org). In an extensive literature search, 20 observational pain scales were identified for review including behavior checklists, behavior rating scales, and global rating scales. These scales varied in their reliance on time sampling and inclusion of physiological items, facial and postural items, as well as their inclusion of multiple dimensions of assessment (e.g., pain and distress). Each measure was evaluated based on its reported psychometric properties and clinical utility. Scales were judged to be indicated for use in specific acute pain contexts rather than for general use. Two scales were recommended for assessing pain intensity associated with medical procedures and other brief painful events. Two scales were recommended for post-operative pain assessment, one for use in hospital and the other at home. Another scale was recommended for use in critical care. Finally, two scales were recommended for assessing pain-related distress or fear. No observational measures were recommended for assessing chronic or recurrent pain because the overt behavioral signs of chronic pain tend to habituate or dissipate as time passes, making them difficult to observe reliably. In conclusion, no single observational measure is broadly recommended for pain assessment across all contexts. Directions for further research and scale development are offered.

Adolescent↗
PubMed2006

Children's self-reports of pain intensity: scale selection, limitations and interpretation.

Most children aged five years and older can provide meaningful self-reports of pain intensity if they are provided with age-appropriate tools and training. Self-reports of pain intensity are an oversimplification of the complexity of the experience of pain, but one that is necessary to evaluate and titrate pain-relieving treatments. There are many sources of bias and error in self-reports of pain, so ratings need to be interpreted in light of information from other sources such as direct observation of behaviour, knowledge of the circumstances of the pain and parents' reports. The pain intensity scales most commonly used with children - faces scales, numerical rating scales, visual analogue scales and others - are briefly introduced. The selection, limitations and interpretation of self-report scales are discussed.

Child↗
PubMed2005

Effects of attentional direction, age, and coping style on cold-pressor pain in children.

This study assessed the relative efficacy of two imagery-based attentional strategies for modifying pain experience in children. Children aged 7-14 years (n = 120) were randomly assigned to one of three conditions: distraction, sensory-focussing or control (no imagery). The distraction condition prompted children to focus their attention externally; the sensory-focussing condition prompted the child to focus internally on physical sensations. Self-report measures of pain coping style preferences and imagery ability were completed. Children's pain tolerance and perceptions of pain intensity were assessed using a 10 degrees C cold-pressor task. Results showed pain intensity ratings after 1 min were lower for both intervention conditions than for the controls. Younger children (7-9 years) showed higher pain tolerance in the distraction condition than in the sensory-focussing condition, whereas both interventions were equally effective for older children (10-14 years). Among older children, coping style interacted with the intervention type: in the sensory-focussing condition, pain tolerance was negatively associated with self-reported distraction-based coping style, whereas in the distraction condition this association was positive. The results are interpreted with reference to current models of attention. The implications for use of attentional strategies in helping children to cope with clinical pain are discussed.

Adaptation, Psychological↗
PubMed2005

Online psychological treatment for pediatric recurrent pain: a randomized evaluation.

OBJECTIVE: To evaluate the efficacy of a distance treatment delivered through Internet and telephone for pediatric recurrent pain. METHODS: Forty-seven participants (9-16 years of age) were randomly assigned to either an Internet-based treatment or a standard medical care waitlist. Treatment employed a Web-based manual for children and parents with weekly therapist contact by telephone or e-mail. At 1- and 3-month follow-ups, participants were assessed on the outcome variables of pain and quality of life. A 50% reduction in diary pain scores was considered clinically significant. RESULTS: Significant between-group differences were found: 71 and 72% of the treatment group achieved clinically significant improvement at the 1- and 3-month follow-ups, respectively, whereas only 19 and 14% of the control group achieved the criterion. No significant differences were found on the quality of life variable. CONCLUSIONS: Distance methods have considerable potential for making effective treatments more accessible with lower associated costs.

Adolescent↗
PubMed2005

Guidelines for the cold pressor task as an experimental pain stimulus for use with children.

UNLABELLED: The cold pressor task (CPT) involves placing a hand or forearm in cold water, a stimulus that produces a slowly mounting pain of mild to moderate intensity and is terminated by voluntary withdrawal of the limb. The CPT has been used in many studies of pain, autonomic reactivity, and hormonal stress responses. Use of the CPT with children was first reported in 1937, and it has been used since then in at least 24 published studies including more than 1700 children without reported adverse effects. However, differences in water temperature, apparatus, and procedure might contribute to conflicting results. We offer suggested guidelines for the safe construction and operation of apparatus for the CPT and for consistent administration of the task and measurement. In particular, use of continuously circulating water at a temperature of 10 degrees C +/- 1 degrees C is recommended for the CPT with children and adolescents. Data on children's pain tolerance found in CPT studies in the authors' laboratories are provided. PERSPECTIVE: Differences in methodology might have contributed to conflicting results in published research using the CPT with children. These guidelines for apparatus and for administration of the CPT might be helpful to researchers planning such studies. Questions for research leading toward further methodologic refinement are identified.

Child↗
PubMed2004

Children's memory for pain: overview and implications for practice.

UNLABELLED: Children's memories of painful experiences can have long-term consequences for their reaction to later painful events and their acceptance of later health care interventions. This review surveys research on children's memory for pain, emphasizing implications for clinical practice. Topics reviewed include consequences of children's memories of pain; the development of memory; differences between explicit (declarative, verbal, autobiographic) memory and implicit (nondeclarative, nonverbal) memory; and individual differences, situational, and methodologic factors affecting memories of pain. Methods to prevent the adverse consequences of remembered pain are addressed with reference to current research on editing or reframing memories. PERSPECTIVE: This review covers topics of value to clinicians providing care to children undergoing painful procedures. Specific recommendations are offered regarding the importance of acknowledging and assessing children's previous memories of painful experiences, the type of information that benefits children before and after procedures, and the most appropriate questioning strategies. It might be possible to prevent or reduce the adverse effects of memories of pain.

Adaptation, Psychological↗
PubMed2002

Expected and reported pain in children undergoing ear piercing: a randomized trial of preparation by parents.

This study examined experimentally the effectiveness of preparatory information provided by parents in creating accurate expectations and reducing children's procedural pain. Ear piercing was used as an analogue to minor painful medical procedures. Sixty children, aged 5-12 years, requesting ear piercing and accompanied by their parents, were randomly assigned to a parental information or contact-control condition. Parents in the information group were asked to read their child a description of the procedures and sensations of ear piercing. Parents in the contact-control condition played picture games for the same amount of time. Expected pain was measured on a visual analogue scale (VAS) and the Faces Pain Scale-Revised (FPS-R) before and after the parental information or contact-control procedure. Experienced pain was measured on the same two scales immediately after the ear piercing. Prepared children had more accurate expectations and reported significantly less pain (M=27.3) than non-prepared children (M=49.8). The validity of the measures was supported by strong correlations (r=0.87 to 0.96) between the VAS and FPS-R. The findings suggest that parental provision of preparatory information creates accurate expectations and reduces pain for children.

Child↗
PubMed2002

Cognitive-behavioural predictors of children's tolerance of laboratory-induced pain: implications for clinical assessment and future directions.

This study sought to investigate cognitive-behavioural predictors of children's tolerance for laboratory-induced cold-pressor pain. It was hypothesised that pain tolerance, as measured by immersion time, would be greater in children who were high in self-efficacy for pain, high in self-reported use of cognitive-coping strategies, and low in emotion-focused coping strategies such as catastrophising. Age and sex differences were also examined in post hoc analyses. Children between the ages of 7 and 14 years (N = 53) participated in the study. Offering partial support for the hypotheses, use of cognitive distraction was found to be associated with greater pain tolerance, while use of internalising/catastrophising was associated with lower pain tolerance. Older boys tended to have greater pain tolerance than younger boys, whereas younger and older girls had intermediate pain tolerance levels. Self-efficacy for pain, in general, was found to be positively correlated with age. The results support efforts to identify children who, because they have lower confidence or lower skills in coping with distress, may need extra support and preparation for painful procedures. Further research is needed to investigate these findings within a clinical pain context.

Adaptation, Psychological↗
PubMed2002

Pain in children with cerebral palsy: common triggers and expressive behaviors.

To obtain parents' identification and description of the behaviors, health care procedures and daily living situations associated with pain in children with cerebral palsy (CP), surveys were sent to parents of children with CP recruited via a clinic case list and a parents' newsletter. Forty-three parents completed the survey. Results indicated that children's ability to communicate pain verbally did not influence whether or not their parent reported observing pain. Most children (67%) were reported to have displayed pain within the month prior to rating. All pain behaviors on the Non-Communicating Children's Pain Checklist (Dev Med Child Neurol 40 (1998) 340) were endorsed by some parents, and few additional pain behaviors were identified, suggesting that this instrument adequately samples the pain behavior of children with CP. Assisted stretching was the daily living activity most frequently identified as painful by parents (93% of those reporting pain), and the one with the highest mean pain intensity. Needle injection (40%) was the medical and nursing procedure most frequently identified by parents as painful for their children. Range of motion manipulation was the therapy most frequently identified as painful by parents (58%), and the one with the highest mean intensity. Parents are able to observe pain in their children with CP regardless of the child's verbal fluency. Knowledge of behaviors and painful situations identified by parents can facilitate management of pain in children with CP.

Activities of Daily Living↗
PubMed2001

The Faces Pain Scale-Revised: toward a common metric in pediatric pain measurement.

The Faces Pain Scale (FPS; Bieri et al., Pain 41 (1990) 139) is a self-report measure used to assess the intensity of children's pain. Three studies were carried out to revise the original scale and validate the adapted version. In the first phase, the FPS was revised from its original seven faces to six, while maintaining its desirable psychometric properties, in order to make it compatible in scoring with other self-rating and observational scales which use a common metric (0-5 or 0-10). Using a computer-animated version of the FPS developed by Champion and colleagues (Sydney Animated Facial Expressions Scale), psychophysical methods were applied to identify four faces representing equal intervals between the scale values representing least pain and most pain. In the second phase, children used the new six-face Faces Pain Scale-Revised (FPS-R) to rate the intensity of pain from ear piercing. Its validity is supported by a strong positive correlation (r=0.93, N=76) with a visual analogue scale (VAS) measure in children aged 5-12 years. In the third phase, a clinical sample of pediatric inpatients aged 4-12 years used the FPS-R and a VAS or the colored analogue scale (CAS) to rate pain during hospitalization for surgical and non-surgical painful conditions. The validity of the FPS-R was further supported by strong positive correlations with the VAS (r=0.92, N=45) and the CAS (r=0.84, N=45) in this clinical sample. Most children in all age groups including the youngest were able to use the FPS-R in a manner that was consistent with the other measures. There were no significant differences between the means on the FPS-R and either of the analogue scales. The FPS-R is shown to be appropriate for use in assessment of the intensity of children's acute pain from age 4 or 5 onward. It has the advantage of being suitable for use with the most widely used metric for scoring (0-10), and conforms closely to a linear interval scale.

Adult↗
PubMedDate not supplied

Global and specific behavioral measures of pain in children with cerebral palsy.

OBJECTIVES: The aim of this research was to validate global and behavioral observation methods for measuring pain in children with cerebral palsy (CP). MATERIALS AND METHODS: Nineteen children diagnosed with CP (2-21 years of age) and their primary caregivers participated in this study. Children and their caregivers were videotaped in their home before, during, and after a stretching exercise, and tests of cognitive and social development were administered. Children who were able to pass a training task were also asked to rate their experience of pain using a numerical rating scale (self-report NRS), but only 5 children (24%) passed so their self-report scores were not included. Healthcare professionals rated videotaped segments for each of the 3 time periods in a randomized order using an observer NRS and the Non-Communicating Children's Pain Checklist-Postoperative Version (NCCPC-PV). Raters trained in the Child Facial Coding System (CFCS) examined the same videotaped segments. RESULTS: Results showed significantly greater pain behavior (observer NRS, NCCP- PV) during the stretching procedure than during the baseline and recovery segments. There were no significant differences in CFCS scores, across time segments. CONCLUSIONS: These findings support the hypothesis that children with CP express discernible pain behaviors regardless of cognitive or language ability. These results contribute to multidimensional assessment of pain in children with neurologic impairment.

Adolescent↗