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Reactions of patients to video recording of consultations in general practice.

The potential value of video recording for examining medical consultations depends on the extent to which recordings are representative of unfilmed consultations. This paper examines the views of 295 patients in two general practices whose consultations were filmed and compares them with the views of a control group of 185 patients. Most of those who were filmed reported that the consultation was not directly affected, and no overall effect of filming was discovered when patients rated their stress after the consultations, their rapport with the doctor, or other aspects of the consultation. At one practice, however, filming was significantly associated with lower ratings of rapport between doctor and patient among those patients who reported some direct effect of filming. Patient refusal rates from other studies are also examined and shown to vary systematically--the more opportunity patients are given to decline the more likely they are to take it. Consideration of doctors' responses to being filmed would usefully complement the emphasis on the views of patients.

Adult↗

Strobofiberscopic video recording of vocal fold vibration.

We describe our current system for strobofiberscopic video recording of vocal fold vibration and our early clinical experiences. The advantages of the strobofiberscopic video system over the strobotelescopic video systems are 1) the range of subjects is wide, and 2) the patient can phonate while maintaining normal head position during examination.

Adolescent↗

Apparent distance in actual, three-dimensional video-recorded, and virtual reality.

This study examined how well reality was reproduced in several conditions of virtual reality, by mutually comparing the perception of distance in actual 3-dimensional space and 3-dimensional video-recorded space. Apparent distances in both indoor and outdoor situations were estimated by 10 adolescents. Analysis showed that relations between apparent distance and physical distance in the actual spaces both in indoor and outdoor situations are described by 0.95 and 1.01 power exponents, respectively. On the other hand, the underestimations of the apparent distance are shown in the 3-dimensional video-recorded and the virtual reality spaces both in indoor and outdoor situations whose exponents ranged from .53 to .80.

Adult↗

An effective and economical solution for digitizing and analyzing video recordings of the microcirculation.

OBJECTIVE: To assemble an economical system for analysis of microcirculation movies. METHODS: Images of cremaster microvessels were recorded onto sVHS video cassettes. These recordings were digitized onto a Macintosh computer using a MiroMotion DC30 plus video compression card and Adobe Premiere software, which permits video rate (25-30 fps) capture of full-sized (768 x 576 PAL, 640 x 480 NTSC) frames. Once captured, images were analyzed using NIH Image software. RESULTS: Combination of the Macintosh computer, the MiroMotion card, and Adobe Premiere allowed capture of high-resolution images at video rate, with the only limitation to sequence length being available hard-drive space. Captured movies could be directly accessed using the freely available NIH Image software. Use of built-in analysis tools and custom-written macros greatly facilitated rapid, accurate, and reproducible analysis of parameters such as blood flow velocity, leukocyte rolling velocity, and firm adhesion. CONCLUSIONS: Low-priced hardware and software aimed at the home-video enthusiast can be combined with free image-analysis software to provide a powerful image-analysis solution for study of the microcirculation.

Animals↗

A video-recording system for evaluating the clinical interview--a simple, inexpensive method.

A simple, inexpensive video-recording system was designed to provide raw data for the evaluation of therapist interview behaviors in the out-patient clinic. The system uses a combination of commercially available cameras, lenses, and recording equipment which do not require technical audio-video expertise to operate. Video-cassette recordings are produced that contain full-face, head-and-shoulders images of both the therapist and the patient. An automatic search control terminal rapidly locates any point on the video-cassette for review. Using normal clinic lighting and little space, the system is easily installed in any existing clinic examination room. A description of the system's use in examining the counseling and interviewing skills of a medical clinic staff is presented.

Clinical Competence↗

Dimensions and progression in the interaction between bilingual/monolingual caregivers and bilingual demented immigrants: analysis of video-recorded morning care sessions in institutions coded by means of the Erikson theory of "eight stages of man".

Seven demented Finnish immigrants were video-recorded during morning care together with bilingual and monolingual Swedish-speaking caregivers. A phenomenological-hermeneutic analysis of the video-recordings inspired by Ricoeur's philosophy was performed. The structural analysis was made by means of the Erikson theory of "eight stages of man." A statistical analysis was done in order to study dimensions and progression of interaction and compare the communication seen in relation to how caregivers supported the patients' integrity.

Adolescent↗

The flaginserter: a simple device for automatically marking events in video recordings.

Dynamic imaging of cellular responses often involves the use of standard video components. While these components (cameras, monitors, etc.) are relatively inexpensive and easily available, there is the difficulty of integrating them into experimental set-ups. Especially for video recordings of fast signals that occur in neurobiological preparations (e.g. synaptic responses), there is a critical need for accurate synchronisation of video images with external events, such as extracellular stimulation or intracellular depolarising voltage steps. We developed a circuit that allows such events within the video sequence to be marked by means of a white flag that is inserted into the video image. Depending on the mode of insertion, the time resolution is better than 17 ms or better than 65 micros (i.e. a single video field or video line, respectively). The circuit has been shown to work reliable in combination with video-rate confocal imaging and patch-clamp recordings.

Animals↗

Video recording in general practice: the patients do mind.

The consent rate for video recording of consultations was examined in a semi-rural training practice in Scotland using a sample of over 1000 patients. An attempt was made to reduce the coercive methods of obtaining consent used in previous studies. In a first study explanatory letters were left in the waiting area - 273 patients returning to reception were asked if they wished to be filmed at a later date - 61 patients (22%) agreed. In a second study 830 patients were handed an explanatory letter asking if they wished to be filmed - 48 patients (6%) volunteered. The overall consent rate for the two studies combined was 10%. The low rate of consent obtained from these patients questions the propriety of using coercive methods.

Family Practice↗

Video recording as a means of evaluating neonatal resuscitation performance.

OBJECTIVE: To determine the compliance to Neonatal Resuscitation Program (NRP) guidelines in our institution, by the use of videotaped newborn resuscitations. BACKGROUND: NRP is the standard of care for newborn resuscitation. The application of NRP guidelines and resuscitation skills in actual clinical settings is undocumented. DESIGN/METHODS: A video recorder, mounted to the radiant warmer in the main obstetrical operating room, was used to record all high-risk resuscitations. All members of the resuscitation team were NRP-certified. The videotapes were reviewed within 14 days of the resuscitation and then erased. This ongoing review was approved as a quality assurance (QA) project ensuring confidentiality under California law. The first 100 resuscitations were evaluated to assess NRP compliance. Each step in the resuscitation (positioning, oxygen delivery, ventilation, chest compressions, intubation, and medication) was graded. A score was devised, with 2 points being awarded for every correct decision and proper procedure, 1 point for delayed interventions or inadequate technique, and zero points for indicated procedures that were omitted or for interventions that were not indicated. The total points were divided by the total possible points for that patient. The scores for the first 25 resuscitations (group 1) and the last 25 resuscitations (group 2) were compared. RESULTS: Fifty-four percent of the 100 resuscitations had deviations from the NRP guidelines. Ten percent received overly aggressive stimulation and 22% had poor suction technique. Of the 78 infants given oxygen, this decision was considered incorrect in 15% and the delivery technique was poor in 10% of the infants given oxygen. Of those requiring mask ventilation (n = 18), 24% had poor chest expansion, 11% used an incorrect rate, and 17% had inadequate reevaluation. Twelve infants were intubated; only 7 were successfully intubated on the first attempt and only 4 were intubated in <20 seconds. The longest intubation attempt was 50 seconds. Naloxone was given to 2 patients. One was breathing spontaneously with a heart rate >100. Resuscitations receiving a perfect evaluation score were more likely to occur in infants needing less intervention. The level of resuscitation required for groups 1 and 2 were statistically similar. There was no difference in resuscitation scores between the 2 groups. Only the inappropriate use of deep suctioning improved, with 8 of 25 events in group 1, and 0 of 25 in group 2. CONCLUSIONS: We have found a significant number of deviations from the NRP guidelines. Video recording of actual clinical practice is a useful QA tool for monitoring the conduct of newborn resuscitation. We are now conducting repeat video assessments of individual NRP providers to determine whether there is improved performance.

California↗

[Use of video recording technique in nursing research on children's health].

This study aims at describing the methodological approach adopted in an investigation on nursing care in the follow-up of children's growth and development in a Basic Health Unit, focusing on the videotaping technique. The study discusses aspects of the exploratory phase, empirical data collection, recording and observation unit by emphasizing the use of video recording as well as its advantages and difficulties.

Child↗

Results of questionnaires regarding video recordings of benign prostatic obstruction by flexible cystourethroscopy responded to by urologists.

OBJECTIVE: To evaluate the reliability of subjective diagnoses of benign prostatic obstruction (BPO) using flexible cystourethroscopy as compared to the actual degree of bladder outlet obstruction as measured by a pressure-flow study (PFS), and to investigate the difference of subjective diagnoses among different urologists. METHODS: A standardized PFS was done in 33 BPO patients. The degree of BPO (0 approximately VI) was determined by linear PURR. Flexible cystourethroscopy was also performed in order to evaluate the BPO by video recording. Nine urologists, who have served on the Japanese Board of Urology, diagnosed the degree of the BPO (0 approximately VI) by watching the video recordings. The degree of obstruction revealed by cystourethroscopy was dependent upon the subjective impression of each urologist who wrote their diagnoses on questionnaires. RESULTS: A positive correlation was found between the results of the PFS and the subjective evaluations based on the cystourethroscopy video (p < 0.001), and the trained urologists arrived at a similar obstruction grade in most cases. However, relatively large gaps between linear PURR and cystoscopic finding were found in some cases. We suggest that these gaps could be caused by dynamic obstructions which cannot be detected by cystourethroscopy. CONCLUSIONS: Even though it is difficult to establish an objective measurement of the degree of a BPO using cystourethroscopy, our results show that it is a simple and reliable tool for the assessment of BPO in most cases.

Aged↗

[EEG video recording].

We analyse EEG data from video-EEG recordings of 24 patients, selected among the 63 with "pure" temporal lobe epilepsy. As to interictal EEG features, 62.5% of patients show a less regular background activity on the affected side, in 70% of patients slow waves are either localised or lobar, while in 58% are spikes. Slow waves and spikes have the same well-defined localisation in 37.5% of the patients. Ictal recordings show an initial EEG pattern with high localising value (low-voltage fast activity, flattening or slow waves interruption) in 74/121 seizures (61%). Five out of these 24 patients were operated on without invasive recordings on the basis of ictal video-EEG data. In the 19 patients left, video-EEG ictal informations were used for the planning of the stereo-EEG exploration.

Electroencephalography↗

Developing the interview protocol for video-recorded child sexual abuse investigations: a training experience with police officers, social workers, and clinical psychologists in Hong Kong.

A series of training programs which focused on culturally relevant questioning skills and video-recorded interviews in child sexual abuse cases were designed for social workers, police officers, and clinical psychologists in Hong Kong. An interview protocol was developed with four stages: rapport building, free narrative of account, questioning, and closure. The content analysis of 74 role-played interviews of video-recorded investigation revealed 119 questions and statements that were rated by these professionals and their instructor as helpful techniques in interviewing children suspected of having been sexually abused. Although each professional interviewed child victims with a unique style, they all found that maintaining a balanced perspective to play their roles in protecting the child, assessing the child, and collecting evidence was the most important aspect in an investigative process.

Child↗

Quantifying motion in video recordings of neonatal seizures by regularized optical flow methods.

This paper presents the development of regularized optical flow computation methods and an evaluation of their performance in the extraction of quantitative motion information from video recordings of neonatal seizures. A general formulation of optical flow computation is presented and a mathematical framework for the development of practical tools for computing optical flow is outlined. In addition, this paper proposes an alternative formulation of the optical flow problem that relies on a discrete approximation of a family of quadratic functionals. These regularized optical flow computation methods are used to extract motion strength signals from video recordings of neonatal seizures.

Algorithms↗

Extraction of motion strength and motor activity signals from video recordings of neonatal seizures.

This paper presents two methods developed to extract quantitative information from video recordings of neonatal seizures in the form of temporal motion strength and motor activity signals. Motion strength signals are extracted by measuring the area of the body parts that move during the seizure and the relative speed of motion using a combination of spatiotemporal subband decomposition of video, nonlinear filtering, and segmentation. Motor activity signals are extracted by tracking selected anatomical sites during the seizure using a modified version of a feature-tracking procedure developed for video, known as the Kanade-Lucas-Tomasi (KLT) algorithm. The experiments indicate that the temporal signals produced by the proposed methods provide the basis for differentiating myoclonic from focal clonic seizures and distinguishing these types of neonatal seizures from normal infant behaviors.

Algorithms↗

Storing analog data in a video record.

We have designed a simple device that will encode, in machine readable form, multiple analog data in a video record. The analog data is visible to the user within the video frame permitting visual correlation of these signals with activity observed in the image. By superimposition of both analog and video data sets, the two are tightly synchronized and remain so in all copies of the data. The analog data can be separated from the image following digitization by a frame grabber. The bandwidth for each of the five analog channels is approximately 5 kHz. The device, which is essentially an eight channel video multiplexor, includes a video channel, a field counter, an amplitude calibration signal and five analog data channels. The amplitude calibrator allows corrections for gain errors that are particularly prevalent when data is stored on video tape.

Calibration↗

Effects of the training of integrity--promoting care on the interaction at a long-term ward. Analysis of video-recorded social activities.

A training programme in integrity-promoting care was given the staff of a long-term ward and practised during a three months intervention period. The effects were analysed in different parameters and compared with a control ward. This report describes analysis of video-recorded interactions (12 hs) during social activities between demented patients and caregivers and changes induced by the programme. The video-recorded episodes, containing mainly music and coffee sessions were interpreted from a model on interaction with demented patients suggested by Athlin & Norberg. The results indicate that the training programme and the guidance during the intervention resulted in increased understanding of demented patients' situation among the staff. They became more sensitive, adapted their cues and made the environment easier to interpret for the patients. This in turn led to the fact that the patients appeared more sensitive and clear in their cues. A positive circle developed.

Aged↗

Consent rates for video-recording general practice consultations: effect of ethnicity and other factors.

We sought consent for video-recording general practice consultations from 260 consecutive attenders in nine surgeries. Intensive fieldwork including language support, from both the researcher and professional interpreters, was undertaken. The overall consent rate was 77.3%. No significant differences in consent rates were found between white and south Asian patients, even after controlling for age, gender and self-reported understanding of English. No differences in consent rates were found with respect to age, gender and self-reported understanding of English.

Adult↗