33 results about "Veress needle" patented technology

A Veress needle assembly comprises an outer steel tube with a sharpened tip at the distal end surrounding an inner rod having a blunt distal end. The proximal end of the inner rod is spring biased towards a position in which its distal end extends beyond the distal end of the outer stainless steel tube so that while piercing the wall of a body cavity the inner rod is forced upwardly against the spring bias to allow the sharpened end of the outer tube to extend into a cutting position. An indicator light supported on the proximal end of the assembly is controlled by a switch which is in a first position when the outer tube is passing through the wall of the body cavity and a second position when the outer tube enters the body cavity behind the wall, allowing the rod to move beyond the distal end of the outer tube, thereby changing the illumination of the light source so that the operator is signaled that the Veress needle has passed into the body cavity.

A laparoscopic instrument for forming an incision in a body cavity, insufflating the body cavity with gas, and suturing the incision at the completion of the surgery includes a set of jaws at the distal end of the Veress needle or cannula. The jaws are pivoted to one another for motion between an open position or a closed position in which they may be used to grasp a suture in the body cavity for removal from the cavity for knotting. A push mechanism at the proximal end of the instrument moves the jaws between their open and closed position on successive actuations of a pushbutton and retains them in that state until the next push. An illumination source is provided for the distal end of the instrument to provide illumination through the walls of the body cavity so that the surgeon can determine the degree of penetration of the instrument into the body cavity and can identify any major arteries which should be avoided in the formation of other laparoscopic openings.

A single step body insertion device comprises a cannula and a Veress needle which penetrates the skin surface and relevant tissue layers to reach fluid and / or gases that need to be removed from the body. The cannula shaft and tapered tip are of a polymeric material which is flexible and kink resistant. The Veress needle has an engagement feature for engagement with the tapered tip of the cannula for delivery of the cannula into the body as the Veress needle is inserted into the body. The device is used for the management of conditions such as pneumothoraxes and pleural effusions as well as other conditions that require release of fluid and / or gas from the body.

A Veress needle is modified to receive a forward-looking miniature videoscope through the cannula of an insufflation tube of the Veress needle. The modified instrument enables direct viewing of progress of the instrument through tissue to the peritoneal cavity of a patient, for proper location of the needle and insufflation of the cavity via the needle. The videoscope has an elongated shaft of smaller diameter than the cannula of the insufflation tube for passage of insufflation gas with the scope in place. In another embodiment a needle is fitted with a miniature videoscope to provide the same function, with the needle's cannula serving as an insufflation tube.

A medical device including a portion similar to a Veress needle, useful for relief of tension pneumothorax. The device includes a hollow tubular stylet disposed movably within a hollow needle or cutting cannula, and an optionally releasable locking mechanism for keeping the stylet in place protruding distally beyond the sharpened distal end of the cutting cannula to prevent puncture of internal organs after the chest wall has been intentionally punctured. The stylet can also be moved outward from within the cannula to push a plug of tissue from the bore of the cannula. A valve or a connector for a tube may be provided at a proximal end of the stylet.

A puncture assistance device for use in connection with an ultrasound probe to guide a Veress needle through the layers of the wall into a bodily cavity is provided. The puncture assistance device comprises a tenaculum-like forceps, a needle guide body provided with a slot for guiding the Veress needle within the scan plane of the ultrasound probe, attachment means to the ultrasound probe, and attachment means of the needle guide to the tenaculum-like forceps. Also provided is a balloon catheter for use as a retractor in gaining access into the abdominal cavity, presenting at its distal end an inflatable balloon membrane and an framework of non-distendable flexible fibers disposed in a specific arrangement. A method access the abdominal cavity with the aid of said devices under ultrasound guidance is also provided.

The invention discloses a disposable veress needle manufacturing method which comprises the following steps: 1) arranging a grip; 2) arranging a stylet; 3) arranging a puncture needle; 4) arranging a protector; and 5) arranging an acousto-optic warning device. The invention also discloses a veress needle manufactured by the disposable veress needle manufacturing method. The method disclosed by the invention is simple and easy to implement, and is low in cost. The veress needle disclosed by the invention has ingenious structural design: when the key is not pressed down, the protector starts the protection function to effectively protect the point of the puncture needle by utilizing a protection part on the stylet; in the puncture process, the protector stops protection, the acousto-optic warning device starts induction to correspondingly drive a buzzer and an LED (light-emitting diode) lamp, thereby warning the operator to concentrate; and after the pneumoperitoneum is punctured, the protector recovers the protection function to prevent the needle from accidentally injuring the internal organs, and meanwhile, the acousto-optic warning device is automatically shut down, thereby greatly enhancing the safety and effectiveness of the puncture surgery. The veress needle is simple to operate; and the veress needle is disposable, thereby avoiding cross infection and having high safety.

The invention discloses an airbag indicating and locating pneumoperitoneum needle. The airbag indicating and locating pneumoperitoneum needle comprises an outer needle, an inner core and a needle sheath for fixing the outer needle, an opening is formed in the rear end of the needle sheath, the rear end is provided with an elastic airbag, a rotary valve is arranged between the opening and cavity of the needle sheath, the needle sheath is communicated with the cavity through the rotary valve, the rotary valve comprises a barrel body integrated with the needle sheath and a valve body firmly matched in the barrel body, a rotating handle is arranged at one end of the valve body, the other end extends out of the barrel body to form a joint, the valve body is provided with a first passage and a second passage corresponding to the opening of the needle sheath, wherein one end of the second passage is opened, and the opening at the other end of the joint is communicated with the cavity to form the second passage when the first passage is closed. The airbag indicating and locating pneumoperitoneum needle is improved based on an existing pneumoperitoneum needle, the carbon dioxide feeding mode is changed, and the existing method for detecting whether the pneumoperitoneum needle enters the abdominal cavity is changed. By means of the airbag indicating and locating pneumoperitoneum needle, an operator does not need to prepare an injector for injecting normal saline and only needs to use air. The improved rotary valve is convenient for communicating with carbon dioxide, and the valve is very convenient to switch.

A Veress needle having a penetration member (130) that protects a needle tip (112) in order to avoid damage to an organ located inside a puncture site (192) when puncturing a wall portion (190) in a living body. The abdominal needle is provided with a fall-off prevention mechanism (105). The fall-off prevention mechanism (105) has an elasticity-based function by causing the front end portion (134) of the insertion member (130) to protrude from the inner cavity (118) after the puncture is completed. A deformed curved shape so that the needle tip (112) does not fall off from the puncture site (192).