Elaborating on these two factors, he says: "Backsiphonage conditions exist when there is a negative or subatmospheric
pressure in the supply piping, allowing downstream substances to be siphoned into the potable water supply.
The tubing was then connected to a wall suction and subatmospheric
pressures were applied to the wound.
The device conducts subatmospheric
pressure (negative pressure) at a controlled level to the wound surface (Huang et al.
The purpose of chest drainage is to remove the fluid or air accumulated in the pleural cavity, allowing lung re-expansion and the reestablishment of the subatmospheric
pressure of the space, thus avoiding complications.
The evaluation of subatmospheric
pressure and hyperbaric oxygen in ischaemic full-thickness wound healing.
The pleural space is normally a subatmospheric
pressure environment throughout the entire respiratory cycle.
Some cases after EBP report that the epidural needle was correctly located within the epidural space (15,16), so it has been speculated that while the operator is collecting venous blood, the dural rent from an earlier unintentional dural puncture allows air to pass to the subarachnoid space, because of negative intrathoracic pressure during inspiration, which reduces epidural pressure to subatmospheric
Bernstein BH, Tam H 2005 Combination of subatmospheric
pressure dressing and gravity feed antibiotic instillation in the treatment of post-surgical diabetic foot wounds: a case series Wounds 17 (2) 37-48
6) Since typical pressures in an activated carbon-methanol system are subatmospheric
, a hermetically sealed outer vessel is required.
Conventional skin suction and vacuum-assisted suspension operate along the same continuum: they both create subatmospheric
levels of vacuum.
In addition, local upper airway mechanoreceptors respond to subatmospheric
(negative or suction) pressure and modulate genioglossus activity (79-82).
Fungitoxic activity of 12 essential oils against four postharvest citrus pathogens: chemical analysis of Thymus capitatus oil and its effect in subatmospheric