US20040243140A1 - Collapsible intra-bronchial valve devices - Google Patents
Collapsible intra-bronchial valve devices Download PDFInfo
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- US20040243140A1 US20040243140A1 US10/848,041 US84804104A US2004243140A1 US 20040243140 A1 US20040243140 A1 US 20040243140A1 US 84804104 A US84804104 A US 84804104A US 2004243140 A1 US2004243140 A1 US 2004243140A1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B17/12099—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder
- A61B17/12104—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder in an air passage
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B17/12027—Type of occlusion
- A61B17/12036—Type of occlusion partial occlusion
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B17/12131—Occluding by internal devices, e.g. balloons or releasable wires characterised by the type of occluding device
- A61B17/12168—Occluding by internal devices, e.g. balloons or releasable wires characterised by the type of occluding device having a mesh structure
- A61B17/12172—Occluding by internal devices, e.g. balloons or releasable wires characterised by the type of occluding device having a mesh structure having a pre-set deployed three-dimensional shape
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/04—Tracheal tubes
- A61M16/0402—Special features for tracheal tubes not otherwise provided for
- A61M16/0404—Special features for tracheal tubes not otherwise provided for with means for selective or partial lung respiration
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B2017/1205—Introduction devices
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B2017/1205—Introduction devices
- A61B2017/12054—Details concerning the detachment of the occluding device from the introduction device
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/04—Hollow or tubular parts of organs, e.g. bladders, tracheae, bronchi or bile ducts
- A61F2002/043—Bronchi
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- Surgical Instruments (AREA)
- Media Introduction/Drainage Providing Device (AREA)
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- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
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Abstract
An air passageway obstruction device includes a frame structure and a flexible membrane overlying the frame structure. The frame structure is collapsible upon advancement of the device into the air passageway, expandable into a rigid structure upon deploying in the air passageway and re-collapsible upon removal from the air passageway. The flexible membrane obstructs inhaled air flow into a lung portion communicating with the air passageway. The device may be removed after deployment in an air passageway by re-collapsing the device and pulling the device proximally through a catheter.
Description
- This is a divisional of U.S. patent application Ser. No. 09/951,105, filed on Sep. 11, 2001, the entire contents of which are incorporated herein by reference.
- The present invention is generally directed to a treatment of Chronic Obstructive Pulmonary Disease (COPD). The present invention is more particularly directed to removable air passageway obstruction devices, and systems and methods for removing the devices.
- Chronic Obstructive Pulmonary Disease (COPD) has become a major cause of morbidity and mortality in the United States over the last three decades. COPD is characterized by the presence of airflow obstruction due to chronic bronchitis or emphysema. The airflow obstruction in COPD is due largely to structural abnormalities in the smaller airways. Important causes are inflammation, fibrosis, goblet cell metaplasia, and smooth muscle hypertrophy in terminal bronchioles.
- The incidence, prevalence, and health-related costs of COPD are on the rise. Mortality due to COPD is also on the rise. In 1991 COPD was the fourth leading cause of death in the United States and had increased 33% since 1979.
- COPD affects the patients whole life. It has three main symptoms: cough; breathlessness; and wheeze. At first, breathlessness may be noticed when running for a bus, digging in the garden, or walking up hill. Later, it may be noticed when simply walking in the kitchen. Over time, it may occur with less and less effort until it is present all of the time.
- COPD is a progressive disease and currently has no cure. Current treatments for COPD include the prevention of further respiratory damage, pharmacotherapy, and surgery. Each is discussed below.
- The prevention of further respiratory damage entails the adoption of a healthy lifestyle. Smoking cessation is believed to be the single most important therapeutic intervention. However, regular exercise and weight control are also important. Patients whose symptoms restrict their daily activities or who otherwise have an impaired quality of life may require a pulmonary rehabilitation program including ventilatory muscle training and breathing retraining. Long-term oxygen therapy may also become necessary.
- Pharmacotherapy may include bronchodilator therapy to open up the airways as much as possible or inhaled .beta.-agonists. For those patients who respond poorly to the foregoing or who have persistent symptoms, Ipratropium bromide may be indicated. Further, courses of steroids, such as corticosteroids, may be required. Lastly, antibiotics may be required to prevent infections and influenza and pheumococcal vaccines may be routinely administered. Unfortunately, there is no evidence that early, regular use of pharmacotherapy will alter the progression of COPD.
- About 40 years ago, it was first postulated that the tethering force that tends to keep the intrathoracic airways open was lost in emphysema and that by surgically removing the most affected parts of the lungs, the force could be partially restored. Although the surgery was deemed promising, the procedure was abandoned.
- The lung volume reduction surgery (LVRS) was later revived. In the early 1990's, hundreds of patients underwent the procedure. However, the procedure has fallen out of favor due to the fact that Medicare stopping reimbursing for LVRS. Unfortunately, data is relatively scarce and many factors conspire to make what data exists difficult to interpret. The procedure is currently under review in a controlled clinical trial. What data does exist tends to indicate that patients benefited from the procedure in terms of an increase in forced expiratory volume, a decrease in total lung capacity, and a significant improvement in lung function, dyspnea, and quality of life. However, the surgery is not without potential complications. Lung tissue is very thin and fragile. Hence, it is difficult to suture after sectioning. This gives rise to potential infection and air leaks. In fact, nearly thirty percent (30%) of such surgeries result in air leaks.
- Improvements in pulmonary function after LVRS have been attributed to at least four possible mechanisms. These include enhanced elastic recoil, correction of ventilation/perfusion mismatch, improved efficiency of respiratory muscaulature, and improved right ventricular filling.
- Lastly, lung transplantation is also an option. Today, COPD is the most common diagnosis for which lung transplantation is considered. Unfortunately, this consideration is given for only those with advanced COPD. Given the limited availability of donor organs, lung transplant is far from being available to all patients.
- In view of the need in the art for new and improved therapies for COPD which provide more permanent results than pharmacotherapy while being less invasive and traumatic than LVRS, at least two new therapies have recently been proposed.
- Both of these new therapies provide lung size reduction by permanently collapsing at least a portion of a lung.
- In accordance with a first one of these therapies, and as described in U.S. Pat. No. 6,258,100 assigned to the assignee of the present invention and incorporated herein by reference, a lung may be collapsed by obstructing an air passageway communicating with the lung portion to be collapsed. The air passageway may be obstructed by placing an obstructing member in the air passageway. The obstructing member may be a plug-like device which precludes air flow in both directions or a one-way valve which permits air to be exhaled from the lung portion to be collapsed while precluding air from being inhaled into the lung portion. Once the air passageway is sealed, the residual air within the lung will be absorbed over time to cause the lung portion to collapse.
- As further described in U.S. Pat. No. 6,258,100, the lung portion may be collapsed by inserting a conduit into the air passageway communicating with the lung portion to be collapsed. An obstruction device, such as a one-way valve is then advanced down the conduit into the air passageway. The obstruction device is then deployed in the air passageway for sealing the air passageway and causing the lung portion to be collapsed.
- The second therapy is fully described in copending U.S. application Ser. No. 09/534,244, filed Mar. 23, 2000, for LUNG CONSTRICTION APPARATUS AND METHOD and, is also assigned to the assignee of the present invention. As described therein, a lung constriction device including a sleeve of elastic material is configured to cover at least a portion of a lung. The sleeve has a pair of opened ends to permit the lung portion to be drawn into the sleeve. Once drawn therein, the lung portion is constricted by the sleeve to reduce the size of the lung portion.
- Both therapies hold great promise for treating COPD. Neither therapy requires sectioning and suturing of lung tissue.
- While either therapy alone would be effective in providing lung size reduction and treatment of COPD, it has recently been proposed that the therapies may be combined for more effective treatment. More specifically, it has been proposed that the therapies could be administered in series, with the first mentioned therapy first applied acutely for evaluation of the effectiveness of lung size reduction in a patient and which lung portions should be reduced in size to obtain the best results. The first therapy is ideal for this as it is noninvasive and could be administered in a physician's office. Once the effectiveness of lung size reduction is confirmed and the identity of the lung portions to be collapsed is determined, the more invasive second mentioned therapy may be administered.
- In order to combine these therapies, or simply administer the first therapy for evaluation, it will be necessary for at least some of the deployed air passageway obstruction devices to be removable. Unfortunately, such devices as currently known in the art are not suited for removal. While such devices are expandable for permanent deployment, such devices are not configured or adapted for recollapse after having once been deployed in an air passageway to facilitate removal. Hence, there is a need in the art for air passageway obstruction devices which are removable after having been deployed and systems and methods for removing them.
- The invention provides device for reducing the size of a lung comprising an obstructing structure dimensioned for insertion into an air passageway communicating with a portion of the lung to be reduced in size, the obstructing structure having an outer dimension which is so dimensioned when deployed in the air passageway to preclude air from flowing into the lung portion to collapse the portion of the lung for reducing the size of the lung, the obstructing structure being collapsible to permit removal of the obstruction device from the air passageway.
- The invention further provides an assembly comprising a device for reducing the size of a lung, the device being dimensioned for insertion into an air passageway communicating with a portion of the lung to be reduced in size, the device having an outer dimension which is so dimensioned when deployed in the air passageway to preclude air from flowing into the lung portion to collapse the portion of the lung for reducing the size of the lung, a catheter having an internal lumen and being configured to be passed down a trachea, into the air passageway, and a retractor dimensioned to be passed down the internal lumen of the catheter, seizing the device, and pulling the obstruction device proximally into the internal lumen to remove the device from the air passageway. The device is collapsible after having been deployed to permit the device to be pulled proximally into the internal lumen of the catheter by the retractor.
- The invention further provides a method of removing a deployed air passageway obstruction device from an air passageway in which the device is deployed. The method includes the steps of passing a catheter, having an internal lumen, down a trachea and into the air passageway, advancing a retractor down the internal lumen of the catheter to the device, seizing the device with the retractor, collapsing the device to free the device from deployment in the air passageway, and pulling the device with the retractor proximally into the internal lumen of the catheter.
- The invention still further provides an air passageway obstruction device comprising a frame structure, and a flexible membrane overlying the frame structure. The frame structure is collapsible upon advancement of the device into the air passageway, expandable into a rigid structure upon deployment in the air passageway whereby the flexible membrane obstructs inhaled air flow into a lung portion communicating with the air passageway, and re-collapsible upon removal from the air passageway.
- The invention still further provides an air passageway obstruction device comprising frame means for forming a support structure, and flexible membrane means overlying the support structure. The frame means is expandable to an expanded state within an air passageway to position the membrane means for obstructing air flow within the air passageway and is collapsible for removal of the device from the air passageway.
- The features of the present invention which are believed to be novel are set forth with particularity in the appended claims. The invention, together with further objects and advantages thereof, may best be understood by making reference to the following description taken in conjunction with the accompanying drawings, in the several figures of which like referenced numerals identify identical elements, and wherein:
- FIG. 1 is a simplified sectional view of a thorax illustrating a healthy respiratory system;
- FIG. 2 is a sectional view similar to FIG. 1 but illustrating a respiratory system suffering from COPD and the execution of a first step in treating the COPD condition in accordance with the present invention;
- FIG. 3 is a perspective view, illustrating the frame structure of a removable air passageway obstruction device embodying the present invention;
- FIG. 4 is a perspective view of the complete air passageway obstruction device of FIG. 3;
- FIG. 5 is an end view of the device of FIG. 3 illustrating its operation for obstructing inhaled air flow;
- FIG. 6 is another end view of the device of FIG. 3 illustrating its operation for permitting exhaled air flow;
- FIG. 7 is a perspective view of the device of FIG. 3, illustrating its operation for permitting partial exhaled air flow;
- FIG. 8 is a side view illustrating a first step in removing the device of FIG. 3 in accordance with one embodiment of the present invention;
- FIG. 9 is another side view illustrating the collapse of the device of FIG. 3 as it is removed from an air passageway;
- FIG. 10 is a side view illustrating an initial step in the removal of the device of FIG. 3 in accordance with another embodiment of the present invention;
- FIG. 11 is a side view illustrating engagement of the frame structure of the device with a catheter during removal of the device;
- FIG. 12 is a side view illustrating the collapse of the device by the catheter during removal of the device;
- FIG. 13 is a side view of another air passageway obstruction device embodying the present invention during an initial step in its removal from an air passageway;
- FIG. 14 is another side view of the device of FIG. 13 illustrating its collapse during removal from the air passageway;
- FIG. 15 is a perspective view of the frame structure of another removable air passageway obstruction device embodying the present invention;
- FIG. 16 is a cross-sectional side view of the device of FIG. 15 shown in a deployed state;
- FIG. 17 is a perspective side view of the device of FIG. 15 shown in a deployed state;
- FIG. 18 is a side view illustrating an initial step in removing the device of FIG. 15 from an air passageway;
- FIG. 19 is a side view illustrating an intermediate step in the removal of the device of FIG. 15; and
- FIG. 20 is a side view illustrating the collapse of the device of FIG. 15 during its removal from an air passageway.
- Referring now to FIG. 1, it is a sectional view of a healthy respiratory system. The
respiratory system 20 resides within thethorax 22 which occupies a space defined by thechest wall 24 and thediaphragm 26. - The
respiratory system 20 includes thetrachea 28, theleft mainstem bronchus 30, theright mainstem bronchus 32, thebronchial branches sub-branches respiratory system 20 further includesleft lung lobes right lung lobes - Characteristic of a healthy respiratory system is the arched or inwardly
arcuate diaphragm 26. As the individual inhales, thediaphragm 26 straightens to increase the volume of thethorax 22. This causes a negative pressure within the thorax. The negative pressure within the thorax in turn causes the lung lobes to fill with air. When the individual exhales, the diaphragm returns to its original arched condition to decrease the volume of the thorax. The decreased volume of the thorax causes a positive pressure within the thorax which in turn causes exhalation of the lung lobes. - In contrast to the healthy respiratory system of FIG. 1, FIG. 2 illustrates a respiratory system suffering from COPD. Here it may be seen that the
lung lobes diaphragm 26 is not arched but substantially straight. Hence, this individual is incapable of breathing normally by moving thediaphragm 28. Instead, in order to create the negative pressure in thethorax 22 required for breathing, this individual must move the chest wall outwardly to increase the volume of the thorax. This results in inefficient breathing causing these individuals to breathe rapidly with shallow breaths. It has been found that theapex portion upper lung lobes - In accordance with this embodiment of the present invention, COPD treatment or evaluation is initiated by feeding a conduit or
catheter 70 down thetrachea 28, into a mainstream bronchus such as theright mainstem bronchus 32, and into an air passageway such as thebronchial branch 42 or thebronchial sub-branch 50. An air passageway obstruction device embodying the present invention is then advanced down aninternal lumen 71 of thecatheter 70 for deployment in the air passageway. Once deployed, the obstruction device precludes inhaled air from entering the lung portion to be collapsed. In accordance with the present invention, it is preferable that the obstruction device take the form of a one-way valve. In addition to precluding inhaled air from entering the lung portion, the device further allows air within the lung portion to be exhaled. This results in more rapid collapse of the lung portion. However, obstruction devices which preclude both inhaled and exhaled air flow are contemplated as falling within the scope of the invention. - The
catheter 70 is preferably formed of flexible material such as polyethylene. Also, thecatheter 70 is preferably preformed with abend 72 to assist the feeding of the catheter from theright mainstem bronchus 32 into thebronchial branch 42. - FIGS. 3 and 4 show an air
passageway obstruction device 80 embodying the present invention. Thedevice 80 includes aproximal end 82 and adistal end 84. Thedevice 80 further includes aframe structure 86 including frame supports 88, 90, and 92. - Each of the frame supports has a shape to define a generally
cylindrical center portion 94 and a pair of oppositely extending inwardly arcuateconical end portions fixation members proximal end 82. The fixation members have the generally conical shape and terminate in fixation projections or anchors 106, 108, and 110 which extend radially outwardly. - Overlying and partially enclosing the
frame structure 86 is aflexible membrane 112. The flexible membrane extends over the generally cylindrical andconical portions - The flexible membrane may be formed of silicone or polyurethane, for example. It may be secured to the frame structure in a manner known in the art such as by crimping, riveting, or adhesion.
- The
frame structure 86 and thedevice 80 are illustrated in FIGS. 3 and 4 as the device would appear when fully deployed in an air passageway. The frame structure supports and frame structure fixation members are preferably formed of stainless steel or Nitinol or other suitable material which has memory of an original shape. The frame structure permits the device to be collapsed for advancement down theinternal lumen 71 of thecatheter 70 into the air passageway where the device is to be deployed. Once the point of deployment is reached, the device is expelled from the catheter to assume its original shape in the air passageway. In doing so, the generallycylindrical portion 94 contacts the inner wall of the air passageway and thefixation projections device 80 within the air passageway. - When the
device 80 is deployed, theframe structure 86 andflexible membrane 112 form an obstructing structure or one-way valve. FIGS. 5 and 6 show the valve action of thedevice 80 when deployed in an air passageway, such as thebronchial branch 42. - As shown in FIG. 5, during inhalation, the flexible membrane is filled with air and expands outwardly to obstruct the
air passageway 42. This precludes air from entering the lung portion being collapsed. However, as shown in FIG. 6, during expiration, theflexible membrane 112 deflects inwardly to only partially obstruct theair passageway 42. This enables air, which may be in the lung portion being collapsed, to be exhaled for more rapid collapse of the lung portion. FIG. 7 is another view showing thedevice 80 during expiration with aportion 114 of themembrane 112 deflected inwardly. - FIGS. 8 and 9 illustrate a manner in which the
device 80 may be removed from theair passageway 42 in accordance with one embodiment of the present invention. As previously mentioned, it may be desired to remove thedevice 80 if it is only used for evaluating the effectiveness of collapsing a lung portion or if it is found the more effective treatment may be had with the collapse of other lung portions. - The
device 80 is shown in FIG. 8 in a fully deployed state. Thecatheter 70 having theinternal lumen 71 is advanced to the proximal end of thedevice 80. In FIG. 8 it may be noted that thefixation members catheter 70 is moved distally as shown in FIG. 9, the internal lumen of the catheter engages thefixation members air passageway 42. With the device now free of the air passageway side wall, the retractor may be used to pull the device into theinternal lumen 71 of thecatheter 70 causing the support structure and thus the device to collapse. The collapsed device may now fully enter the internal lumen of the catheter for removal. - FIGS. 10-12 show another embodiment of the present invention for removing the
device 80 from theair passageway 42. Here, thecatheter 70 is fed down abronchoscope 118 to thedevice 80. The retractor takes the form of aforceps 120. - In FIG. 10 it may be seen that the forceps has just engaged the
proximal end 82 of thedevice 80. In FIG. 11 theforceps 120 is held stationary while thecatheter 70 is advanced distally so that theinternal lumen 71 of thecatheter 70 engages thefixation members catheter 70 as seen in FIG. 12 deflects thefixation projections air passageway 42. Now, the forceps may be used to pull thedevice 80 into theinternal lumen 71 of thecatheter 70 for removal of thedevice 80 from theair passageway 42. - FIGS. 13 and 14 show another removable air
passageway obstruction device 130 and a method of removing it from an air passageway in accordance with the present invention. Thedevice 130 is shown in FIG. 13 deployed in theair passageway 42 and thecatheter 70 is in ready position to remove thedevice 130 from theair passageway 42. - The
device 130 is of similar configuration to thedevice 80 previously described. Here however, thefixation members pivot point 140 at thedistal end 142 of thedevice 130. They extend distally and then are turned back at an acute angle to terminate at fixation or anchor ends 146 and 148. When the device is deployed as shown in FIG. 13, the cylindrical portions of the support frame engage the inner wall of theair passageway 42 and the fixation points 146 and 148 project into the inner wall of theair passageway 42 to maintain the device in a fixed position. Theflexible membrane 150 extends from the dashedline 152 to the pivot orcrossing point 140 of the frame supports 132 and 134 to form a one-way valve. - When the device is to be removed, the frame structure of the
device 130 is held stationary by a retractor within thecatheter 70 and the catheter is advanced distally. When thecatheter 70 engages the frame supports 132 and 134, the frame supports are deflected inwardly from their dashed line positions to their solid line positions. This also causes thefixation members arrows 154. These actions disengage thedevice 130 from the inner wall of theair passageway 42. Now, the retractor may pull the device into theinternal lumen 71 of thecatheter 70 for removal of thedevice 130 from theair passageway 42. - FIGS. 15-17 show a still further removable air
passageway obstruction device 160 embodying the present invention. As shown in the initial collapsed state in FIG. 15, thedevice 160 includes a plurality of frame supports 162, 164, 166, and 168. The frame supports extend between aproximal ring 170 and adistal ring 172. Thedevice 160 is preferably laser cut from a sheet of Nitinol. - Since each of the frame supports are identical,
only frame support 164 will be described herein. As will be noted, thesupport 164 includes abend point 174 with a relativelylong section 176 extending distally from thebend point 174 and a relativelyshort section 178 extending proximally from thebend point 174. Theshort section 178 includes a fixation projection oranchor 180 extending slightly distally from thebend point 174. - FIGS. 16 and 17 show the
device 160 in its deployed configuration. When the device is deployed, it is advanced down a catheter to its deployment site in its collapsed state as shown in FIG. 15. When the deployment site is reached, thedevice 160 is held outside of the catheter and therings fixation projections - The relatively long sections of the frame supports are covered with a
flexible membrane 186 as shown in FIGS. 16 and 17 to form a one-way valve. The valve functions as previously described to obstruct inhaled air flow but to permit exhaled air flow. - FIGS. 18-20 illustrate a manner of removing the
device 160 from an air passageway. Once again acatheter 70 is advanced down abronchoscope 118 to thedevice 160. Next, a retractor including aforceps 120 and pin 190 are advanced to the device. Thepin 190, carrying alarger diameter disk 192, extends into the device as theforceps 120 grasps theproximal ring 170 of thedevice 160. Thepin 190 continues to advance until thedisk 192 engages thedistal ring 172 of thedevice 160 as shown in FIG. 19. Then, while theforceps 120 holds theproximal ring 170, thepin 190 anddisk 192 are advanced distally carrying thedistal ring 172 distally. This causes thedevice 160 to straighten and collapse as shown in FIG. 20. Now, theforceps 120,pin 190, and thedevice 160 may be pulled into theinternal lumen 71 of thecatheter 70 for removal of the device. As will be appreciated by those skilled in the art, the foregoing steps may be reversed for deploying thedevice 160. - While particular embodiments of the present invention have been shown and described, modifications may be made, and it is therefore intended in the appended claims to cover all such changes and modifications which fall within the true spirit and scope of the invention.
Claims (12)
1. A method of removing a deployed air passageway obstruction device from an air passageway in which the device is deployed, the method comprising:
advancing a catheter through a trachea and into the air passageway, the catheter having an internal lumen;
advancing a retractor through the internal lumen of the catheter to the device;
grasping a portion of the device with the retractor;
collapsing the device to free the device from deployment in the air passageway; and then
pulling the device and the retractor proximally into the internal lumen of the catheter after collapsing the device.
2. The method of claim 1 , wherein collapsing the device comprises moving a proximal portion of the device proximally relative to a distal portion of the device.
3. The method of claim 1 , wherein grasping comprises grasping a proximal portion of the device.
4. The method of claim 3 , wherein grasping further comprises advancing a portion of the retractor through a center of the device and engaging a distal portion of the device.
5. The method of claim 4 , wherein collapsing comprises moving the proximal portion proximally relative to the distal portion.
6. The method of claim 1 , wherein collapsing the device comprises reducing the diameter of the device to a diameter less than an internal diameter of the catheter.
7. An intra-bronchial obstruction device comprising:
a frame structure comprising a plurality of support members and at least one anchor member; and
an obstructing structure configured to prevent air flow in at least a first direction through a lumen in which the device is deployed;
wherein the frame structure is configured to be collapsed in response to a pair of opposing axial forces.
8. The device of claim 7 , wherein the obstructing structure comprises a membrane overlying and enclosing a portion of the frame structure.
9. The device of claim 7 , further comprising a proximal ring at a proximal end of the device and a distal ring at a distal end of the device.
10. The device of claim 9 , wherein the proximal ring is configured to be engaged by endoscopic forceps.
11. The device of claim 9 , wherein the proximal ring comprises a central opening sized to receive a pin, and the distal ring being configured to engage the pin.
12. The device of claim 7 , wherein the frame structure is made of nickel titanium.
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ATE418920T1 (en) | 2009-01-15 |
US20160030049A1 (en) | 2016-02-04 |
EP2078502A2 (en) | 2009-07-15 |
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US8974484B2 (en) | 2015-03-10 |
DE60230638D1 (en) | 2009-02-12 |
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CA2459702A1 (en) | 2003-03-20 |
EP1424970A2 (en) | 2004-06-09 |
ES2318034T3 (en) | 2009-05-01 |
US20090205667A1 (en) | 2009-08-20 |
EP1424970B1 (en) | 2008-12-31 |
CA2459702C (en) | 2012-05-08 |
JP4291144B2 (en) | 2009-07-08 |
US20040206349A1 (en) | 2004-10-21 |
EP1424970A4 (en) | 2007-02-28 |
WO2003022124A3 (en) | 2003-08-21 |
US20040211412A1 (en) | 2004-10-28 |
US20130345737A1 (en) | 2013-12-26 |
JP2005503852A (en) | 2005-02-10 |
WO2003022124A2 (en) | 2003-03-20 |
US20110054632A1 (en) | 2011-03-03 |
AU2002324677B2 (en) | 2008-07-10 |
AU2002324677B9 (en) | 2008-07-31 |
US8414655B2 (en) | 2013-04-09 |
EP2078502A3 (en) | 2009-08-26 |
AU2008229870A1 (en) | 2008-10-30 |
US7757692B2 (en) | 2010-07-20 |
AU2002324677C1 (en) | 2008-12-11 |
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