Journal: Journal of Clinical Medicine

Article Title: Device for Negative Pressure Wound Therapy in Low-Resource Regions: Open-Source Description and Bench Test Evaluation

doi: 10.3390/jcm11185417

Figure Lengend Snippet: Diagram of the negative pressure device. Black: hardware components, red lines: signals, to generate negative pressure. A transducer measures actual pressure. The user sets the blue arrows: air flow direction. With the outlet open to room air, the vacuum pump suctions air from the wound dressing target pressure in the front panel. The controller compares the target and real pressure and drives the pump with the voltage required to minimize pressures difference. An orifice open to the atmosphere (conventional hypodermic needle) ensures that even if the pump is blocked, the wound will not remain under permanent negative pressure. See text for details.

Article Snippet: The actual vacuum pressure applied to the wound was measured by an external pressure transducer (26PC, Honeywell, Charlotte, NC, USA), and the exudate volume drained by the device was measured by a scale weighing the liquid trap bottle (density of simulated exudate: 1.03 g/mL (20)).

Techniques:

Journal: Journal of Clinical Medicine

Article Title: Device for Negative Pressure Wound Therapy in Low-Resource Regions: Open-Source Description and Bench Test Evaluation

doi: 10.3390/jcm11185417

Figure Lengend Snippet: Detailed picture of the 3D printed wound phantom: ( A ) shows the orifices for exudate secretion (one of them noted by a yellow arrow); ( B ) shows exudate secretion by means of an infusion pump. ( C ) Bench test diagram. The functional setting (in black) consists of the negative pressure device connected to the wound phantom (in blue) through a liquid bottle trap for the exudate by flexible tubes A and B and a conventional wound dressing. Two added measuring devices (in green) were added only for bench testing: the exudate trap bottle was placed on a scale to measure the exudate suctioned, and a negative pressure transducer (PT) was connected to tube A to measure actual pressure at the wound.

Article Snippet: The actual vacuum pressure applied to the wound was measured by an external pressure transducer (26PC, Honeywell, Charlotte, NC, USA), and the exudate volume drained by the device was measured by a scale weighing the liquid trap bottle (density of simulated exudate: 1.03 g/mL (20)).

Techniques: Functional Assay

Journal: Journal of Clinical Medicine

Article Title: Device for Negative Pressure Wound Therapy in Low-Resource Regions: Open-Source Description and Bench Test Evaluation

doi: 10.3390/jcm11185417

Figure Lengend Snippet: General ( A ) and front panel ( B ) pictures of the low-cost negative pressure device. Using knobs, the user can set the values and durations of maximum and minimum intermittent negative pressure (if these two values coincide or the time for one of the negative pressures is set to zero, constant pressure is generated). A display continuously shows the settings and the value of actual pressure (P) measured by the pressure transducer. A red-light alarm is on if vacuum pressure is outside a tolerance range. ( C ) Picture of the interior part of the device: (1) Negative pressure pump; (2): pump outlet; (3) pump inlet; (4) tube connecting room air with the pump outlet; (5) Arduino controller; (6): pressure transducer; (7): orifice (needle) open to room air; (8): perforated needle protector (for clarity, not in its place in this picture); (9) display; (10) negative pressure port of the device. See text for details.

Article Snippet: The actual vacuum pressure applied to the wound was measured by an external pressure transducer (26PC, Honeywell, Charlotte, NC, USA), and the exudate volume drained by the device was measured by a scale weighing the liquid trap bottle (density of simulated exudate: 1.03 g/mL (20)).

Techniques: Generated