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MPEG digital compression and analogue videotape: a comparison of moving images and electroencephalogram data in epileptic patients.

PRIMARY OBJECTIVES: The objective of this study was to compare the clinical usefulness, in the field of epileptology, of digital moving images and electroencephalogram (EEG) waveforms by Motion Pictures Expert Group compression algorithms (MPEG-1 and MPEG-2) to that of conventional analogue recording. RESEARCH DESIGN AND METHODS: Three epileptic seizure scenes consisting of moving images and the corresponding EEG waveforms in an epileptic patient were selected as the images to be evaluated. Each scene was recorded using MPEG-1, MPEG-2 and videotape. Ten doctors used six criteria to evaluate the quality of moving images, EEG data and audio. MAIN OUTCOMES: Analysis of variance and Bonferroni tests indicated that the image quality of MPEG-2 was superior to that of MPEG-1 or videotape for all criteria. Furthermore, MPEG-2 obtained much higher scores in EEG waveform quality than did the other modalities. CONCLUSIONS: Our findings suggested that data from MPEG-2 images will lead to more precise diagnosis and treatment decision-making than data from analogue videotape recordings.

Data Compression↗

Patients, doctors, and videotape: a prescription for creating optimal healing environments?

Despite repeated calls for greater patient autonomy, shared decision making, and exploration of patient preferences, relatively little is known about how patients actually experience care as a face-to-face interactional process. A selected review of the literature in this area suggests that important asymmetries exist. Key among them is the tendency to report experiences from the point of view of only one member of the doctor-patient dyad. Thus, patients might report on their experiences of the system gone awry or professionals might attempt to understand the root cause(s) of an error by describing the conditions under which it occurred. Either way, information about the experience of care tends to be reported as a "my side" telling. Optimal healing environments are defined as health care contexts that are based upon mutual respect and build positive, resilient relationships among participants, using the qualities and resources of those relationships to enhance health. Understanding optimal healing environments also requires a knowledge of how doctors and patients share time and space together in the consultation (an etic or outsider perspective) and also a knowledge of the participants' experience of their time together (an emic or insider perspective). After reviewing its methodological roots, the IMPACT approach (Interactive Methodology for Preserving and Analyzing Clinical Transactions) using videotaped encounters along with independent commentaries by participants is described and applied in two different types of analyses: one in which the doctor-patient dyad is the unit of measure; the second in which physicians are stratified by having historically high or low satisfaction scores. In the latter approach, doctors' and patients' comments are compared across strata. At the dyadic level, and despite large gaps in income and social status, doctors and patients exhibit a strong tendency to cluster in terms of where they comment, so much so that in a pilot study using the approach, each stopped and commented on the videotapes at the "same" location (within an utterance of one another) 60% of the time. This finding flies in the face of traditional sociological thought, which holds that the greater the social distance between actors (doctors and patients), the more difficult it should be to communicate. With respect to being stratified by historical satisfaction scores, doctors with high historical satisfaction were found to comment more often, make fewer assumptions, take longer with their patients, and be more vigilant than doctors with historically low satisfaction scores. We conclude that videotape review is a parsimonious way of integrating face-to-face communication with the participants' lived experience of the care process, a necessary ingredient in creating optimal healing environments.

Attitude of Health Personnel↗

Outcomes of videotape instruction in clinic waiting area.

PURPOSE: The purpose of our study was to examine the effectiveness of general health-promotion teaching for patients in the waiting room of a clinic, using focused videotape instruction. DESIGN: An experimental design was used. SAMPLE: Subjects were patients (N = 215) in the waiting rooms of clinics in a university medical center in the Midwest. METHOD: Patients were randomly assigned to two groups: focused videotape instruction in the clinic (n = 106) and control (no instruction in the clinic waiting area) (n = 109). The outcome measures included patient learning about a health education topic and patient satisfaction with overall care, explanations by the provider, and education received during the clinic visit. FINDINGS: There was a significant gain in knowledge for patients who viewed the videotape in the waiting room (t = 5.43, df = 213, p < .0001), and they were more satisfied with their education compared with the control group (t = 4.73, df = 213, p < .0001). IMPLICATIONS: This study supports focused video instruction as an effective and efficient teaching intervention for disseminating health information in the waiting area.

Educational Measurement↗

Videotape preparation of patients before hip replacement surgery reduces stress.

OBJECTIVE: Elective surgery represents a considerable source of stress for the patient. Many attempts have been made to prepare patients before surgery with the aim of reducing stress and improving outcome. This study used a novel approach to fulfill this aim by showing a videotape of a patient undergoing total hip replacement surgery, covering the time period from hospital admission to discharge, that strictly keeps to the patient's perspective. METHODS: Before elective total hip replacement surgery, 100 patients were randomly assigned to a control group or a preparation group; the latter group was shown the videotape on the evening before surgery. Anxiety and pain were evaluated daily for 5 days, beginning with the preoperative day, by means of the State-Trait Anxiety Inventory and a visual analog scale. Intraoperative heart rate and blood pressure, as well as postoperative intake of analgesics and sedatives, were recorded. Urinary levels of cortisol, epinephrine, and norepinephrine were determined in 12-hour samples collected at night for 5 nights, beginning with the preoperative night. RESULTS: Compared with the control group, the preparation group showed significantly less anxiety on the morning before surgery and the mornings of the first 2 postoperative days, and significantly fewer of them had an intraoperative systolic blood pressure increase of more than 15%. The pain ratings did not differ significantly between the two groups, but the prepared patients needed less analgesic medication after surgery. Prepared patients had significantly lower cortisol excretion during the preoperative night and the first 2 postoperative nights. Excretion of catecholamines did not differ significantly between groups. CONCLUSIONS: We conclude that use of the videotape decreased anxiety and stress, measured in terms of urinary cortisol excretion and intraoperative systolic blood pressure increase, in patients undergoing hip replacement surgery and prepared them to cope better with postoperative pain.

Adaptation, Psychological↗

Decreased circumcision rate with videotaped counseling.

Despite the lack of medical indication for routine circumcision in the newborn, neonatal circumcision continues to be done on the vast majority of male infants in the United States. A trial of videotaped "informed consent" counseling was undertaken to determine whether such counseling could affect the parental choice about circumcision. We studied the circumcision frequency rate (CFR) after videotape counseling. We compared it to the rates following standard oral counseling. Videotaped counseling, in contrast to the standard physician-parent oral counseling, significantly reduced the incidence of parents' requests for routine neonatal circumcision.

Circumcision, Male↗

Experimental manipulation of cocaine craving by videotaped environmental cues.

Thirteen male patients consecutively admitted to an inpatient drug and alcohol rehabilitation hospital with the primary diagnosis of crack cocaine dependence were shown a 30-minute videotape that included salient environmental cues intended to elicit cocaine craving. The subjects were tested before and after the videotape by the use of a continuous 20-cm analogue visual instrument that asks them to rate their perceived degree of craving, mood, energy, and wellness. Only craving showed a statistically significant change from pretest to posttest. Correlations among the four separate ratings suggest that mood and craving are different dimensions that independently contribute to one's general sense of well-being. This study demonstrates that cocaine craving can be induced in a group setting by presenting certain visual and auditory cues on a video monitor. The procedure of obtaining self-ratings in response to videotaped environmental cues could be easily incorporated into research methods designed to assess pharmacologic efficacy in reducing the intense craving that reinforces addiction.

Adult↗

Captured for consideration--using videotape as an aid to the treatment of the disturbed child.

The use of videotape as a clinical tool to monitor work with children is discussed with reference to a group of three emotionally disturbed children seen weekly in a paediatric assessment and treatment centre. Six particular attributes of videotape are distinguished and illustrated from clinical material: video is a vehicle for discussion; video permits detailed observation; video see things that humans do not; video has a distancing effect; video shares information and video trains in observation and handling techniques. It is suggested that the experience derived from using videotape intensively over a short period can be applied to advantage in other clinical situations.

Affective Symptoms↗

Assessment of clinical psychiatric skills in final-year medical students: the use of videotape.

Sixty final-year medical students had their clinical performance in psychiatry assessed by the following three methods: a multiple choice questionnaire based on a series of short videotaped interviews with psychiatric patients; the examination of a traditional long 'case' with presentation of the history, mental state findings and formulation about diagnosis and management to a panel of three examiners; and a conventional oral examination about the principles and practice of psychiatry with a different trio of examiners. The total mark on the videotape session correlated significantly with the combined clinical and oral marks. There was also a significant positive correlation between the total video marks and the individual clinical marks, but none between the marks obtained during the video and oral components of the examination. However, the significant positive correlations between the video marks and those of the clinical examination were modest and only accounted for not more than 14% of the variance. Inspection of the distribution of correct answers to the videotape questions shows that students do best in identifying mental state symptoms and signs and in choosing the correct diagnosis. They do less well in the areas of aetiology and treatment. Indeed, optimal performance in the latter distinguishes those who do well in the clinical/oral examination from those whose performance is mediocre. The significance of these findings to the teaching and assessment of psychiatric skills in medical students is discussed.

Education, Medical, Undergraduate↗

A comparison of videotaped and live patient interview examinations and written examination in psychiatry.

The authors scored the examination performance of 28 psychiatrists who were tested after conducting an interview with a real patient and after seeing a videotaped interview with an actor playing the role of either a psychotic or a neurotic patient. The also scored the performance of 15 of the same examinees who completed a written examination. Eighty-five percent of the examinees reported that the videotaped interview examination was a useful learning experience, and 81% said that it was a useful testing experience. The examiners' feelings varied regarding the use of the standardized videotaped format for certification and recertification of psychiatrists.

Certification↗

Tetrabenazine treatment for tardive dyskinesia: assessment by randomized videotape protocol.

OBJECTIVE: Tetrabenazine, a monoamine depleter and dopamine receptor blocker, is used to treat several hyperkinetic movement disorders. The authors studied the use of tetrabenazine for tardive dyskinesia. METHOD: Twenty patients with tardive dyskinesia (mean duration = 43.7 months) were videotaped before and after tetrabenazine treatment. Randomized videotapes were scored with the motor subset of the modified Abnormal Involuntary Movement Scale (AIMS) by raters blind to pre- or posttreatment status. RESULTS: One patient did not tolerate tetrabenazine owing to sedation. The remaining 19 were rated after a mean of 20.3 weeks at a mean tetrabenazine dose of 57.9 mg/day. There were significant improvements in mean scores on both the patient AIMS self-rating and the AIMS motor subset evaluated by the blind videotape raters. All 19 patients continued to take tetrabenazine after the study. CONCLUSIONS: Tetrabenazine was well tolerated and resulted in significant improvements in AIMS scores for patients with refractory tardive dyskinesia.

Adult↗

Childhood videotaped social and neuromotor precursors of schizophrenia: a prospective investigation.

OBJECTIVE: The authors examined videotaped behaviors of children who developed schizophrenia as adults and of comparison subjects to disclose possible social and neuromotor deficits foreshadowing later development of schizophrenia. METHOD: In 1972, a sample of 265 11-13-year-old Danish children were filmed under standardized conditions while they were eating lunch. The examination was part of a larger study investigating early signs of schizophrenia spectrum disorders. Many of the subjects had a parent with schizophrenia, leaving them at high risk for developing a schizophrenia spectrum disorder. In 1991, adult psychiatric outcome data were obtained for 91.3% (N=242). This study systematically analyzed the videotapes to determine whether the children who developed schizophrenia as adults evidenced greater social and/or neuromotor deficits than children who did not develop a psychiatric disorder and children who developed other psychiatric disorders. RESULTS: The findings from this study suggest that the brief videotaped footage of children eating lunch was able to discriminate between the individuals who later developed schizophrenia and those who did not. Specifically, the preschizophrenia children evidenced differences on measures of sociability and general neuromotor functioning (among boys) from the children who developed other psychiatric disorders and the children who did not develop a psychiatric disorder. CONCLUSIONS: Social and neuromotor deficits specific to children who develop schizophrenia in adulthood provide further support for a neurodevelopmental hypothesis of schizophrenia.

Adolescent↗

Use of videotape in diagnosis and treatment of cancer of larynx.

Sophisticated endoscopic techniques coupled with new developments in medical videotaping have made this combination a clinically useful technique in the diagnosis and management of laryngeal cancer. Preoperative tapings in the physician's office and taping at laryngoscopy and biopsy allow for better assessment and permanent record of size and location of lesion, location of biopsies, and physiologic impairment of laryngeal function. All personnel participating in treatment including radiotherapists, surgeons, pathologists, radiologists, chemotherapists, and speech therapists can clearly see the lesion and contribute more usefully to decisions regarding treatment. Videotaping during and after radiotherapy and chemotherapy and after partial laryngectomy can aid in assessing response to treatment, provide a permanent record for comparison, and aid in detecting treatment failure or recurrence. Finally, these techniques aid our educational process for future physicians by permanently and objectively recording the appearance of lesions, treatment, and outcome. (The presentation included actual videotape material used in the processes described.)

Education, Medical↗

Testing videotape education for heart failure.

This pilot study tested a videotape intervention designed to improve patient self-management of heart failure (HF). Content of the video series (produced professionally under a federal grant) is based on national, scientifically validated guidelines for HF home management. Outcomes tested were HF knowledge, symptom reporting, and functional status. Participants were 10 newly diagnosed HF patients (mean age 67). After viewing the tapes, data indicated participants had a clinically relevant improvement in HF knowledge, and improved or maintained HF health status. None were rehospitalized during the 60-day follow-up period. One patient contacted his/her physician to report weight gain, as prompted by the videotapes. The cost data indicated that patients paid $177 out of pocket monthly for medications and all were low income. These results indicate the need for further testing of the videotape as a potentially cost-effective method of teaching about HF self-management and daily home self-monitoring.

Aged↗

A videotaped CIBIC for dementia patients: validity and reliability in a simulated clinical trial.

BACKGROUND: The global impression of a clinician is an Food and Drug Administration--mandated primary outcome measure for clinical trials in dementia. Reliability and validity of these measures are not well established. METHODS: A videotaped version of the Clinician's Interview Based Impression of Change (CIBIC) was evaluated. Raters were informed that the videotaped interviews were taken at baseline and 6 to 12 months later, when in fact half of the interviews were shown in reverse order. Ratings on "true order" interviews were compared with ratings on "reverse order" interviews. In addition, ratings by neurologists experienced in dementia were compared with those of less experienced raters. RESULTS: Inter-rater reliability of the neurologists was poor when measured by absolute agreement on a 7-point scale (kappa = 0.18). With a less stringent 3-point scale (better, worse, or unchanged), inter-rater reliability was significantly better for the true order videos (kappa = 0.51) than for the reversed order videos (kappa = 0.12). Validity also was reduced in the reverse order group: neurologists rated 90% of subjects correctly in the "true order" group and 63% correctly in the "reversed order" group. The inter-rater reliability of the neurologists was greater than the less experienced raters, but the validity of the neurologists' ratings was only marginally better. CONCLUSIONS: The reliability and validity of the videotape CIBIC are reasonable when patients follow the expected course of gradual decline, but are poor when patients appear to improve. These findings suggest that global assessments should be modified as outcome measures in clinical trials with patients with dementia.

Aged↗

Library orientation on videotape: production planning and administrative support.

New student-faculty-staff orientation is an important public service in a medical library and demands creativity, imagination, teaching skill, coordination, and cooperation on the part of public services staff. The Northwestern University Medical Library (NUML) implemented a video production service in the spring of 1986 and used the new service to produce an orientation videotape for incoming students, new faculty, and medical center staff. Planning is an important function in video production, and the various phases of outlining topics, drafting scripts, matching video sequences, and actual taping of video, voice, and music are described. The NUML orientation videotape demonstrates how reference and audiovisual services merge talent and skills to benefit the library user. Videotape production, however, cannot happen in a vacuum of good intentions and high ideals. This paper also presents the management support and cost analysis needed to make video production services a reality for use by public service departments.

Audiovisual Aids↗

A videotape to improve parental knowledge of lead poisoning.

BACKGROUND: Disadvantaged children are at high risk for lead poisoning. Their parents often have poor knowledge of lead poisoning and do not know how to prevent lead poisoning in their child. OBJECTIVE: To assess an educational videotape's impact on parental knowledge and behavior about lead poisoning. DESIGN: Prospective study by self-administered parental survey immediately before (pretest) and after (posttest 1) well visits and mailed 2-4 weeks later (posttest 2). The intervention group watched the videotape immediately after the pretest. SETTING: Pediatric clinic in tertiary care hospital. PARTICIPANTS: Consecutive sample of parents of 6-month-old to 6-year-old children (n = 146). MAIN OUTCOME MEASURES: Survey included demographic questions, the shortened Chicago Lead Knowledge Test (sCLKT), and questions about parental behaviors. RESULTS: Mean pretest scores were 5.8 (SD, 2.8) and 5.3 (SD, 2.2), posttest 1 scores were 6.0 (SD, 2.6) and 10.6 (SD, 2.1), and posttest 2 scores were 6.1 (SD, 2.8) and 9.5 (SD, 2.8) of 14 in the control and intervention groups, respectively. Control and intervention group posttest 1 and posttest 2 score differences were statistically significant (P <.05). Intervention group parents reported more frequent washing of their child's hands (P <.05) and windows, walls, or floors at study completion (P <.05). CONCLUSIONS: The videotape significantly increased sCLKT scores and behaviors that may decrease children's risk of developing lead poisoning. Improvement persisted throughout the study period.

Analysis of Variance↗

Teaching generalization of purchasing skills across community settings to autistic youth using videotape modeling.

Three young autistic adults were trained to purchase items. Training was conducted in one setting with concurrent generalization probes taken in three community stores. Training in one setting failed to produce generalization to the three probe settings. Generalization training, which consisted of viewing videotapes of models who purchased items in the probe settings and answering questions about the models' responses, was then introduced. Training with the videotapes resulted in generalization to the three community stores. Results of the use of videotapes as a cost-effective means to program generalization in community training programs are discussed.

Activities of Daily Living↗

Educating patients with limited literacy skills: the effectiveness of printed and videotaped materials about colon cancer.

We investigated whether printed or videotaped information is more effective in enhancing colon cancer knowledge. Subjects (n = 1100) were randomized into three groups: to receive a booklet, view a videotape, or receive no intervention. Subjects receiving the intervention showed increased knowledge compared with control subjects (booklet = 23% and videotape = 26% vs no intervention = 3%). Findings suggest that personalized educational materials are effective in enhancing colon cancer knowledge.

Colonic Neoplasms↗