Biomedical subjects

G C Anderson

Publications and source records attributed to G C Anderson.

At least 37 records · Page 2Linked to original sources

PubMed1993

Kangaroo care.

Explore the source record for details and available documents.

Adult↗

PubMed1993

Psychometric profiles and related pain characteristics of temporomandibular disorder patients.

The psychological characteristics of patients with temporomandibular disorders have received much attention in the literature. A multivariate clustering technique has been used in the study of psychological characteristics of other chronic pain conditions, and this has recently been applied to "temporomandibular joint pain" patients to develop homogeneous psychometric subgroups. The primary objective of this study was to determine if these subgroups could be replicated in a separate sample. A group of 109 consecutive patients, presenting with complaints of jaw pain, were administered a Symptom Checklist-90 Revised and a questionnaire regarding characteristics of the pain complaint. A multivariate clustering technique was used to identify three discrete psychometric subgroups, as in previous studies. Although similar, these subgroups were not identical to those of previous studies. The small number of subjects in the psychometrically abnormal subgroup was of special interest.

Adolescent↗

PubMed1992

A piezoelectric film transducer for dental occlusal analysis.

Occlusal load, contact sequence and location are necessary parameters for the study of dental biomechanics, simulation and clinical treatment planning. A piezoelectric film transducer for dental occlusal analysis was developed and in vitro evaluations of the transducer were conducted in a servohydraulically driven artificial mouth. The transducer is designed to provide occlusal contact force information. The transducer thickness (9 mum) minimizes interference with normal mandibular closure. Voltage outputs from the sensor as a result of occlusal contacts generated in the artificial mouth were sampled through a computer controlled data acquisition system. The transducer output recorded by the data acquisition system was calibrated to the applied load in the artificial mouth. The output of the piezoelectric film was evaluated during varying loads, cycling frequencies, surface areas of contact, and transducer surface areas. The preliminary studies indicate that the piezoelectric film holds out considerable promise and with further development may be well suited as a diagnostic tool in dental occlusal analysis.

Biomechanical Phenomena↗

PubMed1992

Nonnutritive sucking modulates behavioral state for preterm infants before feeding.

Forty-two pre-term infants were studied to determine the effect of nonnutritive sucking pre-feeding on behavioral state. Infants were randomly assigned to pacifier or rest groups. Pacifiers or rest were given for 5 minutes following routine caregiving and before each of the first 16 bottle feedings. A 12-category scale was used to measure state immediately before the 5-minutes and after. Frequencies of states that precede optimal feedings changed for infants given pacifiers versus rest: alert inactivity (+6 vs. -2), quiet awake (+19 vs. -6), and active awake (-24 vs. +12); infants given pacifiers had more sleep and fewer restless states. Group differences were non-significant before nonnutritive sucking (p = 0.16) but significant after (p = 0.00001). When self-regulatory feeding policies based on early hunger cues are not allowed, nonnutritive sucking for 5 minutes pre-feeding is simple, brief, and appropriate for busy intensive care units. These findings confirm those from earlier less conclusive research and indicate that nonnutritive sucking modulates behavioral state.

Feeding Behavior↗

PubMed1992

The relationship between level of mandibular pain and dysfunction and stage of temporomandibular joint internal derangement.

Temporomandibular joint internal derangement (TMJ ID) is the most common intra-articular TM disorder and can progress from TMJ ID with reduction to TMJ ID without reduction. It is not known whether this anatomical progression is associated with increasing levels of mandibular dysfunction. The objective of this study was to determine whether the level of clinically detectable mandibular dysfunction was related to the stage of TMJ ID. Two clinicians examined 42 subjects prior to bilateral TMJ arthrographic evaluation. The level of mandibular dysfunction was calculated by Helkimo's Clinical Dysfunction Index (Di) and the Craniomandibular Index (CMI). Statistical analysis revealed that the level of mandibular dysfunction as determined by the Di and CMI was not related to the arthrographic presence or absence of TMJ ID. Therefore, the clinician cannot assume that the level of mandibular dysfunction is directly related to the absence or presence of TMJ ID. Epidemiologically, the CMI and Di can be used only for estimation of the degree of mandibular dysfunction, since they do not provide direct information on a specific TM disorder.

Adolescent↗

PubMed1991

Current knowledge about skin-to-skin (kangaroo) care for preterm infants.

Skin-to-skin ("kangaroo") care for preterm infants is becoming widespread in Western Europe. During this care the mother holds her diaper-clad premature infant against her skin beneath her clothing and allows self-regulatory access to breast-feeding. Fathers hold their infants skin-to-skin also. Research projects in Western Europe and the United States provide data that support the safety and effectiveness of this method. Infants held skin-to-skin are warm enough and have regular heart rate and respirations, more deep sleep and alert inactivity, less crying, no increase in infections, greater weight gain, and earlier discharge. Lactation is more productive and of greater duration. Parents become attached to their infants and feel confident about caring for them. This research is summarized and annotated in a table, along with descriptive reports and videotapes. These data can be used by health care professionals to make informed decisions about offering kangaroo care opportunities to selected parents and their preterm infants.

Breast Feeding↗

PubMed1991

Physiologic responses to skin-to-skin contact in hospitalized premature infants.

Twelve stable premature infants in open-air cribs acted as their own controls in a study designed to evaluate the effect of skin-to-skin contact (SSC) with their mothers on infant heart rate, respiratory rate, oxygen saturation, and skin temperature. Measurements were taken every minute during three consecutive interfeeding periods (2 to 3 hours each): pre-SSC, SSC, and post-SSC. Skin-to-skin contact in the upright position between maternal breasts underneath a velour blouse occurred in the continuing care nursery of secondary level NICUs and was compared with infants lying in open-air cribs. All physiologic measures remained within normal limits, suggesting that SSC had no adverse effects. Statistically significant increases in heart rate and skin and rectal temperatures during SSC were also within normal limits. Skin-to-skin contact can occur between hospitalized stable premature infants and their mothers without physiologic compromise and heat loss to the infant. Practice implications are discussed.

Female↗

PubMed1990