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Biomedical subjects

Sapal Tachakra

Publications and source records attributed to Sapal Tachakra.

8 recordsLinked to original sources
PubMed2002

Level of diagnostic confidence, accuracy, and reasons for mistakes in teleradiology for minor injuries.

The objective of this study is to determine whether eliminating uncertainty in diagnosis improves accuracy in teleradiology for remote trauma management and to assess the correlation between the probable reason for the mistake and the level of confidence. An emergency physician interpreted 2133 radiological series transmitted from a community hospital to an emergency department using videoconferencing equipment. He marked his level of confidence as 1 = sure positive; 2 = fairly sure positive; 3 = unsure; 4 = fairly sure negative; 5 = sure negative. The emergency physician also entered free-text comments, e.g., feeling tired, to enable a better understanding of what was happening. The accuracy, sensitivity, and specificity were 97.3% (98.6%), 94.48% (96.72%), and 98.63% (99.42%), respectively. Figures in brackets represent the 93.5% of cases in which the level of confidence was graded as sure. Boredom and hurry were the main reasons identified for mistakes. Reducing uncertainty in diagnosis may improve the accuracy of screen interpretation. This first series must be reproducible by others before any general use of such systems can be made for primary diagnosis. American College of Radiology standards must be met.

Adolescent↗
PubMed2002

The accuracy of length and angle measurement in videoconferencing teleradiology.

Telemedicine was used to make measurements on a series of radiographs. The first group consisted of 25 radiographs of the cervical spine; four lengths were measured on each. The second group consisted of 100 wrist radiographs showing Colles fractures; the degree of backward angulation of the distal fragment was measured on each. Measurements were made via a videoconferencing link. The consultant used the shared white boarding facility to indicate where on the film the measurements were to be made. The videoconferencing link was used to check that the measurements were being made correctly and a nurse measured lengths and angles. In addition, the consultant used the link to read the scales on the measuring instruments for himself. Four different methods of measuring length were tested and three methods of measuring angle. A transparent plastic ruler was best for measuring length-the emergency nurse practitioner and the consultant made almost all measurements to an accuracy of 1 mm. A protractor with pen marker was best for measuring angles; all were made to within 2 degrees. Simple methods can be used to measure lengths and angles in videoconferencing teleradiology.

Cervical Vertebrae↗
PubMed2002

Four years' experience of telemedicine support of a minor accident and treatment service.

In 1996 we studied patients attending a minor accident and treatment service in London, some of whom were the subjects of teleconsultations with a main hospital emergency department. In the subsequent four years, 56,139 patients were seen at the minor accident and treatment service unit. Teleconsultations were performed in 2032 cases (3.6%). Most of the teleconsultations (58%) concerned patients with fractures. The main reason for teleconsultation was to review and discuss radiographs (46%). In comparison with the 1996 study, both the emergency nurse practitioners and the consultant had improved the accuracy of their teleradiology diagnosis, although the difference was not significant. Most of the telemedicine patients (90%) did not need a transfer to the main department. Thus telemedicine allowed local decision making in the majority of cases. In the 1996 survey, 75% of patients were sent to their general practitioner or to the main hospital department; in the present survey, this proportion had halved, to 38%. The present study showed that teleconsultations are an effective way of preventing patients being transferred unnecessarily from a minor accident and treatment service to the main hospital accident and emergency department.

Emergency Service, Hospital↗
PubMed2002

Social presence in telemedicine.

We studied consultations between a doctor, emergency nurse practitioners (ENPs) and their patients in a minor accident and treatment service (MATS). In the conventional consultations, all three people were located at the main hospital. In the teleconsultations, the doctor was located in a hospital 6 km away from the MATS and used a videoconferencing link connected at 384 kbit/s. There were 30 patients in the conventional group and 30 in the telemedical group. The presenting problems were similar in the two groups. The mean duration of teleconsultations was 951 s and the mean duration of face-to-face consultations was 247 s. In doctor-nurse communication there was a higher rate of turn taking in teleconsultations than in face-to-face consultations; there were also more interruptions, more words and more 'backchannels' (e.g. 'mhm', 'uh-huh') per teleconsultation. In doctor-patient communication there was a higher rate of turn taking, more words, more interruptions and more backchannels per teleconsultation. In patient-nurse communication there was relatively little difference between the two modes of consulting the doctor. Telemedicine appeared to empower the patient to ask more questions of the doctor. It also seemed that the doctor took greater care in a teleconsultation to achieve coordination of beliefs with the patient than in a face-to-face consultation.

Communication↗