| 摘要 |
An insufflation apparatus includes an elongated sleeve defining a longitudinal axis and having a proximal end and a distal end with a sharpened tip, an insufflation housing connected to the proximal end of the elongated sleeve and defining a port for receipt of insufflation gases, and a stylet disposed within the elongated sleeve and defining a passageway to direct the insufflation gases from the port into a body cavity. The stylet is movable between an extended position wherein the distal end of the stylet extends beyond the sharpened tip of the elongated sleeve and a retracted position wherein the distal end of the stylet is proximal of the sharpened tip of the elongated sleeve. A biasing member may be engagable with the stylet so as to bias the stylet toward the extended position. Preferably, the housing has a translucent wall and the stylet is dimensioned so that the proximal end of the stylet is visible through the translucent wall when the stylet is in the retracted position. In one embodiment, the port of the housing includes the translucent wall. The port may be in general alignment with the longitudinal axis of the elongated sleeve, or alternatively, in transverse relation relative to the longitudinal axis of the elongated sleeve. In another embodiment, the housing includes an indicator bulb disposed so as to receive the proximal end of the stylet. The indicator bulb has the translucent wall so that the proximal end of the stylet is visible through the indicator bulb when the stylet is in the retracted position.
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