|
|
Publication
|
| Research Title |
A Conical Design of Positive Expiratory Pressure Device |
| Date of Distribution |
22 January 2015 |
| Conference |
| Title of the Conference |
International Conference on “Research for Social Devotion” in Commemoration of the 50th Anniversary of KKU |
| Organiser |
Khon Kaen University |
| Conference Place |
KhonKaen University |
| Province/State |
Khon Kaen, Thailand |
| Conference Date |
22 January 2015 |
| To |
23 January 2015 |
| Proceeding Paper |
| Volume |
2015 |
| Issue |
1 |
| Page |
242-243 |
| Editors/edition/publisher |
|
| Abstract |
Introduction: We want to develop a new PEP device for dynamic exercise in COPD patients. To date, the effect of conical design of PEP device on positive pressure is unknown. We hypostasized that conical length and flow rate directly affected positive pressure. We expected that the conical design may utilize design to generate positive pressure within therapeutic range (5 – 20 cm H2O) at exercised flow rate (0.8 to 1.2 L.sec-1).
Methods: The BIOPAC MP 36 system was set to assess flow rate and positive pressure in three PEP devices with 5 mm diameter outlet orifice and 18 mm inner tube diameter, including 0 mm (a simple PEP device), 20 mm, and 40 mm in length (conical PEP devices). This system included a 50 cm corrugate tube, a bacterial filter for distributing air steam from an air pump, an airflow transducer, a one-way vale T-piece, a pressure cuff transducer and PEP device. We assessed positive pressure responses of each PEP device to flows of 0.1, 0.2, 0.3, …, 1.5 L.sec-1 for three times at 500 Hz of data collection.
Results: result of Two-way ANOVA showed the significant flow effect, conical length effect and interaction effect among flow and conical length (p < .0001). The post hoc analysis demonstrated that the positive pressures exponentially significantly rise up following increasing of flow within each PEP device (P < .001). The 0 mm PEP device represented the highest pressure; while the 40 mm PEP device showed the lowest pressure as compared with other PEP devices at all flow (P < .001). At exercised flow, the pressure responded to the 0 mm, 20 mm and 40 mm PEP devices were reported at 29.01-70.54, 20.58-48.84, and 15.59-36.08 cm H2O respectively.
Conclusions: Increasing of conical length led to positive pressure drop. However, the slopes of pressure-flow response of conical PEP devices were less steep; this may be possible that the conical design may be useful for the exercise. For this result, we did not find the optimum PEP device for exercised flow. Future study should continuously fine the optimal conical length and outlet orifice for exercised flow.
|
| Author |
|
| Peer Review Status |
มีผู้ประเมินอิสระ |
| Level of Conference |
นานาชาติ |
| Type of Proceeding |
Abstract |
| Type of Presentation |
Poster |
| Part of thesis |
true |
| Presentation awarding |
false |
| Attach file |
|
| Citation |
0
|
|
|
|
|
|
|
|
|
Journal Publication
ไทย