Use of Interdisciplinary Education to Foster Familiarization among Health Professionals

This paper describes a pilot interdisciplinary experience between the dental hygiene and medical technology programs at Marquette University. It was designed, in part, to familiarize dental hygiene students with the medical technology profession. Comments solicited from students on the final evaluation form indicated that this pilot project was highly successful and met the objectives. Affective, multiple-choice questions on pretests and posttests showed a positive change in attitude, but this change was not statistically significant. Possible reasons for this are discussed. Benefits of this pilot project were an improved understanding of medical technology on the part of the dental hygiene students, enhanced interdepartmental communication, and plans to develop a reciprocal interdisciplinary experience for the medical technology students. It is hoped that this pilot project will serve as a stimulus for similar experiences among other health science programs

Restoring Functional Status: A Long-Term Case Report of Severe Lung and Ventilatory Muscle Pump Dysfunction Involving Recurrent Bacterial Pneumonias

Background and Purpose: Prolonged mechanical ventilation contributes to immobility and deconditioning making efforts to safely discontinue ventilator support desirable. This case report documents how implementing physical therapy treatment interventions, based on the Guide to Physical Therapist Practice, can help to restore a person’s functional status even after multiple years of mechanical ventilation dependency. Case Description: A patient (female; aged 63 years) with severe restrictive and obstructive ventilatory impairment has survived 34 recurrent pneumonias involving 6 bacterial pathogens while being mechanically ventilated at home. A 3-year study was approved and informed consent obtained for a home exercise program of resistive extremity and inspiratory muscle training along with exercise reconditioning. Tolerable distances walked, maximal inspiratory and expiratory pressures, hours spent on versus off mechanical ventilation, activities performed within and around her home, and community excursions taken were charted. Outcomes: Daily time tolerated off the ventilator improved from less than one to 12 hours, distance walked in 6 minutes increased 33%, and maximal inspiratory and expiratory pressures improved 62% and 9.6% respectively. These improvements made out-of-home social excursions possible. Discussion and Conclusions: This patient’s functional status improved following multiple physical therapy interventions dictated by the evaluation of initial physical therapy examination findings according to the Guide to Physical Therapist Practice. Long term mechanical ventilator dependency in the home environment did not exclude this patient from achieving clinically significant gains in functional status even when having severe restrictive and obstructive ventilator impairment

In vitro Effects of Two Silver Electrodes on Select Wound Pathogens

The use of electrical current to promote wound healing is well documented. However, little is understood about the effects of micro-amperage direct current (μADC) on growth of wound pathogens. The purpose of this project was to investigate the antibacterial effects of a silver wire/silver nylon electrode carrying μADC in vitro on several Gram positive and Gram negative bacteria. The current was delivered via silver wire and silver nylon electrodes at an amplitude of 100 μA for a 30-minute duration in an in vitro system. Results demonstrated that only silver wire carrying current inhibited bacterial growth around the anode. In contrast, the silver nylon electrode with or without current exhibited antibacterial activity around both the anode and cathode. The results of this study provide convincing evidence that the silver ion (AG+) is responsible for suppressing bacterial growth. Both silver electrodes were bactericidal with all Gram negative bacteria tested and bacteriostatis with most Gram positive bacteria tested, suggesting that the cell wall composition may be a determining factor in the effectiveness of the AG+

Antibacterial Effects of a Silver Electrode Carrying Microamperage Direct Current in vitro

Currently, electrical stimulation is an accepted method used clinically to promote chronic wound healing. A literature review revealed that similar therapeutic current has been shown to suppress growth of common wound pathogens in vitro and in vivo. To date, little has been reported on the factors contributing to the antibacterial effects of microamperage direct current (μADC) stimulation. The purpose of this project was to investigate the role of electric field strength, current density, pH, and type of electrode used in vitro, to gain a better understanding of how these factors contribute to inhibiting growth of select wound pathogens. μADC was applied via silver electrodes at amplitudes ranging from 26 μA to 800 μA in an in vitro system consisting of Staphylococcus aureus and Pseudomonas aeruginosa. Results suggest that transmission of μADC by silver wire inhibits bacterial growth around the anode, and that the area of inhibition is directly proportional to the size of the electrode used. Current amplitude (as a function of electric field strength and current density) and pH did not seem to cause the antibacterial effects observed in this study

Effects of cooperative learning on achievement and attitudes toward teamwork in medical technology students

The use of cooperative learning in medical technology education is increasing as faculty search for ways to better prepare graduates for a team-based health care environment. Cooperative learning has been credited with enhancing achievement and teamwork attitudes, however, its effects in medical technology education are unproven. This study empirically compared the effects of cooperative and individual learning on the achievement and teamwork attitudes of medical technology students. Eight faculty members from undergraduate medical technology programs participated in this study. Instructors used cooperative learning during one semester and individual learning during a different semester of the same course. A total of 216 students participated in the study; 107 used the individual learning method and 109 used the cooperative learning method. Student similarity in background subject knowledge was evaluated with a researcher-designed pretest. The same instrument was used at the end of the semester as a posttest to measure achievement. Student attitudes toward teamwork and the course itself were evaluated using a questionnaire administered at the end of the semester. No statistically significant difference (α = 0.05) was found between the two learning methods for achievement at six of the eight participating institutions. At the two institutions where Hematology was taught, there was a significantly higher mean (p ≤ 0.01) for the cooperative learning students, but only when results of the two institutions were combined. When analyzing student attitudes toward teamwork, no significant difference existed between cooperative learning and individual learning student means. In an analysis of student attitude toward the course itself, some individual institutions showed a difference between the two learning methods. However, none of the differences were statistically significant when students from all institutions were analyzed together. No differences were seen in either achievement or in attitudes with either of the two learning methods when students were grouped on the basis of ethnicity or gender. This multi-institutional study of medical technology students suggests that cooperative learning and individual learning produce similar achievement and attitudinal results

Bactericidal and Cytotoxic Effects of Chloramine-T on Wound Pathogens and Human Fibroblasts In Vitro

OBJECTIVES: To evaluate cytotoxicity and bactericidal effects of chloramine-T. METHODS: In vitro study of various concentrations and exposure times to preparations containing human fibroblasts or 1.5 x 108 colony forming units per milliliter (CFU/mL) of 3 gram-positive bacteria-Staphylococcus aureus, methicillin-resistant S aureus, and vancomycin-resistant Enterococcus faecalis-and 2 gram-negative bacteria-Escherichia coli and Pseudomonas aeruginosa-with and without fetal bovine serum present. MAIN OUTCOME MEASURES: Percentage reduction of bacterial growth and percentage of viable fibroblasts 48 hours after exposure. RESULTS: All gram-positive growth was reduced by 95% to 100%, regardless of dose, with or without serum. E coli (gram-negative; with/without serum) was reduced 94% to 100% at antiseptic concentrations of 300 and 400 ppm. At 200 ppm, E coli growth was fully inhibited without serum present and by 50% with serum. P aeruginosa (gram-negative) was not significantly affected under any conditions. At 100 and 200 ppm, cell viability remained greater than 90% under all experimental conditions. A 300-ppm, 3-minute exposure to chloramine-T resulted in cell viability of up to 70%, with longer exposures producing lower viabilities. Serum did not affect cell viability in any condition. CONCLUSIONS: In vitro, chloramine-T at 200 ppm for 5 to 20 minutes was effective against 3 virulent gram-positive bacteria without fibroblast damage. At 300 ppm and 3 and 5 minutes, 30% of fibroblasts were damaged and 95% to 100 % of E coli were inhibited, respectively