Digitizing abdominal palpation with a pressure measurement and positioning device

An abdominal physical examination is one of the most important tools in evaluating patients with acute abdominal pain. We focused on palpation, in which assessment is made according to the patient’s response and force feedback. Since palpation is performed manually by the examiner, the uniformity of force and location is difficult to achieve during examinations. We propose an integrated system to quantify palpation pressure and location. A force sensor continuously collects pressure data, while a camera locates the precise position of contact. The system recorded, displayed average and maximum pressure by creating a pressure/time curve for computer-aided diagnosis. Compared with previous work on pressure sensors of quantifying abdominal palpation, our proposed system is the integrated approach to measure palpation force and track the corresponding position at the same time, for further diagnosis. In addition, we only make use of a sensing device and a general web camera, rather than commercial algometry and infrared cameras used in the previous work. Based on our clinical trials, the statistics of palpation pressure values and the corresponding findings are also reported. We performed abdominal palpation with our system for twenty-three healthy participants, including fourteen males and nine females. We applied two grades of force on the abdomen (light and deep) by four-quadrant and nine-region schemes, record the value of pressure and location. In the four-quadrant scheme, the average pressures of abdominal palpation with light and deep force levels were 0.506(N) and 0.552(N), respectively. In the nine-region scheme, the average pressures were 0.496(N) and 0.577(N), respectively. Two episodes of contact dermal reaction were identified. According to our experiment statistics, there is no significant difference in the force level between the four-quadrant and nine-region scheme. Our results have the potential to be used as a reference guide while designing digital abdominal palpation devices.

Effectiveness of Standardized Patient in Abdominal Physical Examination Education: A Randomized, Controlled Trial

INTRODUCTION

Simulation and virtual technologies currently are used to enhance basic and advanced nursing skills. Information on the use of simulation methods in the Iranian nursing education system, particularly regarding standardized patients (SP), is scarce. Hence, the present study aimed to evaluate the effect of using SP on the performance of Iranian nursing students in the physical examination of the abdomen. In addition, the SP method was compared with the purely lecture-based education method.

METHODS

The present study was of a pre-test/post-test design carried out at the School of Nursing and Midwifery, Kazerun Islamic Azad University (Kazerun, Iran) during 2014. Third-year nursing students were recruited and assigned to either a control or an intervention group. The study was conducted in three phases: pre-test knowledge evaluation, training sessions, and post-test/recall test evaluation of objective structured clinical examination (OSCE). Data were analyzed using the SPSS software (version 16.0). A total of 87 students were included in our analysis.

RESULTS

All participants were female with a mean age of 21.99±1.73 years. The mean pre-test score of the control and intervention groups were 4.98±2.17 and 5.35±1.77, respectively. No significant difference was observed between the groups regarding the OSCE overall scores (P>0.05). However, there was a significant difference between the mean pre-test and post-test scores in each group (P<0.05). Compared to the control group, the difference in the mean pre-test and post-test scores was higher in the intervention group (4.98±2.17 and 14.43±3.93 in control group vs. 5.35±1.77 and 15.39±3.2 in intervention group, respectively). Furthermore, there was no statistically significant difference between the groups in terms of the post-test and recall test scores.

CONCLUSION

Our study demonstrates the SP method is an effective tool for learning to perform the physical examination of the abdomen as compared to the purely lecture-based educational method. The present pilot study could be extended to cover training on the physical examination of other human organs.