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WO2006079827A1 - Ensemble de tube de drainage pour drainer une cavite corporelle - Google Patents

Ensemble de tube de drainage pour drainer une cavite corporelle Download PDF

Info

Publication number
WO2006079827A1
WO2006079827A1 PCT/GB2006/000285 GB2006000285W WO2006079827A1 WO 2006079827 A1 WO2006079827 A1 WO 2006079827A1 GB 2006000285 W GB2006000285 W GB 2006000285W WO 2006079827 A1 WO2006079827 A1 WO 2006079827A1
Authority
WO
WIPO (PCT)
Prior art keywords
drain tube
collar
drain
parts
assembly according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/GB2006/000285
Other languages
English (en)
Inventor
Kamal Ibrahim
Andrew Robert May
John Michael Elam
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
University College London Hospitals NHS Foundation Trust (UCLH)
Original Assignee
University College London Hospitals NHS Foundation Trust (UCLH)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GBGB0501750.4A external-priority patent/GB0501750D0/en
Application filed by University College London Hospitals NHS Foundation Trust (UCLH) filed Critical University College London Hospitals NHS Foundation Trust (UCLH)
Priority to US11/795,936 priority Critical patent/US20080228174A1/en
Publication of WO2006079827A1 publication Critical patent/WO2006079827A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/84—Drainage tubes; Aspiration tips
    • 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
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/02—Holding devices, e.g. on the body
    • 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
    • A61M27/00—Drainage appliance for wounds or the like, i.e. wound drains, implanted drains
    • 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
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/02—Holding devices, e.g. on the body
    • A61M2025/0213—Holding devices, e.g. on the body where the catheter is attached by means specifically adapted to a part of the human body
    • A61M2025/0233—Holding devices, e.g. on the body where the catheter is attached by means specifically adapted to a part of the human body specifically adapted for attaching to a body wall by means which are on both sides of the wall, e.g. for attaching to an abdominal wall
    • 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
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/02—Holding devices, e.g. on the body
    • A61M2025/024—Holding devices, e.g. on the body having a clip or clamp system
    • 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
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/02—Holding devices, e.g. on the body
    • A61M2025/0286—Holding devices, e.g. on the body anchored in the skin by suture or other skin penetrating devices

Definitions

  • the present invention relates to a drain tube assembly for draining a body cavity, and in particular to a chest drain for use in thoracic surgery.
  • the present invention also relates to a kit of parts for such a drain tube assembly.
  • the present invention also relates to an anchoring device for a chest drain.
  • the present invention further relates to a method of inserting a chest drain.
  • Chest drain insertion is typically used to provide drainage of plural effusion and/or pneumothorax. It may be inserted in an emergency, or used post-operatively.
  • the securing requires the use of suturing and self-adhesive dressing tape.
  • the paper discloses in paragraph 13.3.4 and in Figure 4 the use of a suture for securing the exterior surface of the chest drain to the skin of the patient.
  • the chest tube is cylindrical, and the stay suture is wound tightly around the chest tube and then stitched to the skin and subcutaneous tissue.
  • Self-adhesive wound dressing tape is wrapped around the chest tube over the wound suture to hold the suture in place on the tube and to secure a wound dressing over the wound site.
  • An omental tag of the tape may be provided to allow the tube to lie a little away from the chest wall to prevent the tube kinking and tension at the insertion site.
  • the drain needs to be secured so as to be able to be held in place for a significant period.
  • chest drains are inserted for only a few days, for example from 2 to 7 days, but occasionally a chest drain is inserted for up to a month, and the patient may either remain in hospital or be permitted to go home with the chest drain still inserted.
  • small bore tubes in particular blood infusion tubes for connection to veins or arteries, for example a central line
  • an anchoring attachment for example a butterfly device well known to persons skilled in the art.
  • Such devices are usable with such small tubes because the length of the lumen for insertion into the vein or artery is predetermined and also the tube is held, immediately external of the lumen, at a fixed orientation parallel to the skin.
  • the small bore tube is in a fixed orientation with regard to the skin of a patient and inserted to a predetermined depth.
  • Such anchoring systems cannot be employed for chest drains. This is because not only does the chest drain require a variable insertion length, but also the chest drain must also have a variable angle of insertion into the chest cavity of a patient.
  • the chest tube of the chest drain may be arranged either to point up, for evacuating air from the chest cavity, or pointing down, for evacuating fluid from the chest cavity between the chest wall and the lung.
  • such butterfly attachments are not suitable for large tube diameters required of chest drains, typically from 5 to 20 mm in diameter. Accordingly, although fixed orientation attachments such as butterfly attachments have been well known for use with small bore tubes such as central lines for very many years, it is also well known that they are not suitable for use for chest drains.
  • the present invention aims to meet this need and to overcome at least some of the problems of known chest drains, with their accompanying insertion and securing techniques, discussed hereinabove.
  • the present invention also aims to provide an improved drain tube assembly that may be utilised other than as a chest drain.
  • the present invention provides a drain tube assembly for draining a body cavity, the assembly comprising a flexible drain tube having a distal end for insertion into the body cavity and a proximal end, the distal end having at least one drainage hole therein, and at least one attachment ring so as to provide an attachment for suture, the attachment ring being connected to the drain tube by a flexible arm permitting rotational movement of the attachment ring relative to the drain tube.
  • the present invention further provides a kit of parts for a drain tube assembly for draining a body cavity, the kit of parts comprising a flexible drain tube having a distal end for insertion into the body cavity and a proximal end, the distal end having at least one drainage hole therein, the external surface of the drain tube having a radially outwardly directed ridge formed therein at least at one location between the distal and proximal ends of the drain tube, and an anchor piece adapted to be fitted around the drain tube to a mounting point located on the proximal side of and adjacent to the ridge whereby the ridge acts as a stop member preventing movement of the drain tube relative to the anchor piece in a proximal direction, the anchor piece comprising a collar, at least one attachment ring so as to provide an attachment for suture, and a flexible arm connecting the attachment ring to the collar, the flexible arm permitting rotational movement of the attachment ring relative to the collar.
  • the present invention further provides a drain tube assembly for draining a body cavity, the assembly comprising a flexible drain tube having a distal end for insertion into the body cavity and a proximal end, the distal end having at least one drainage hole therein, and at least one attachment for suture integral with a collar of an anchor piece that is disposed around the drain tube, the collar being tightly fitted around the drain tube at a selected longitudinal position along the drain tube.
  • the present- invention further provides a kit of parts for a drain tube assembly for draining a body cavity, the kit of parts comprising a flexible drain tube having a distal end for insertion into the body cavity and a proximal end, the distal end having at least one drainage hole therein, and at least one attachment for suture integral with a collar of an anchor piece that is adapted to be disposed around the drain tube, the collar being adapted to be tightly fitted around the drain tube at a selected longitudinal position along the drain tube.
  • the present invention further provides an anchoring device for a drain tube assembly for draining a body cavity, the anchoring device comprising a collar adapted to be fitted around a drain tube, the collar comprising a locking clip having a central part and two opposed end parts, and the two end parts having complementary interlocking elements which are adapted to be selectively interlocked, to close the locking clip for securing the central part around the drain tube, and unlocked to open the locking clip, and at least one attachment ring so as to provide an attachment for suture, the attachment ring being flexibly connected to the collar thereby to permit movement of the attachment ring relative to the collar.
  • the present invention also provides a method of inserting a chest drain, the method comprising the steps of: providing a chest drain assembly comprising a flexible drain tube having a distal end for insertion into the body cavity and a proximal end, the distal end having at least one drainage hole therein, and at least one attachment ring so as to provide an attachment for suture, the attachment ring being connected to the drain tube by a flexible arm permitting rotational movement of the attachment ring relative to the drain tube; inserting the distal end into the chest cavity of a patient through a wound incision in the chest wall so that the at least one attachment ring is against the skin of the patient and so that the drain tube is at the desired insertion length and orientation; and suturing the at least one attachment ring to the skin.
  • the present invention further provides a method of inserting a chest drain, the method comprising the steps of: providing a chest drain assembly comprising a flexible drain tube having a distal end for insertion into the body cavity and a proximal end, the distal end having at least one drainage hole therein, and at least one attachment for suture integral with a collar of an anchor piece that is disposed around the drain tube; inserting the distal end into the chest cavity of a patient through a wound incision in the chest wall; tightly fitting the collar around the drain tube at a selected longitudinal position along the drain tube so that the at least one attachment for suture is against the skin of the patient and so that the drain tube is at the desired insertion length and orientation; and suturing the at least one attachment for suture to the skin.
  • the present invention yet further provides a method of inserting a chest drain, the method comprising the steps of: providing a flexible drain tube having a distal end for insertion into the body cavity and a proximal end, the distal end having at least one drainage hole therein, the external surface of the drain tube having an outwardly directed ridge formed therein at least at one location between the distal and proximal ends of the drain tube; inserting the distal end into the chest cavity of a patient so that the drain tube is at the desired insertion length and orientation and the ridge is proximal to the wound incision; fitting an anchor piece around the drain tube to a mounting point located on the proximal side of the ridge, the anchor piece comprising a collar for fitting around the drain tube, at least one attachment ring so as to provide an attachment for suture, and a flexible arm connecting the attachment ring to the collar, the flexible arm permitting rotational movement of the attachment ring relative to the collar; disposing the at least one attachment ring against the skin of the patient and the ridge
  • Figure 1 is a schematic side elevation of a chest drain in accordance with a first embodiment of the present invention in a disassembled configuration
  • Figure 2 is a schematic side elevation of the chest drain of Figure 1 in an assembled configuration
  • Figure 3 is an enlarged schematic side elevation, partly in phantom, of a portion of the chest drain of Figure 2 with the anchor piece fitted to the chest tube;
  • Figure 4 is a schematic side elevation, partly in phantom, of the chest drain of Figure 2 inserted into the chest cavity of a patient and secured to the skin of a patient by the anchor piece;
  • Figure 5 is a schematic side elevation of a chest drain in accordance with a second embodiment of the present invention.
  • Figure 6 is a schematic side elevation of a chest drain in accordance with a third embodiment of the present invention.
  • Figure 7 is a schematic side perspective view of an anchoring device for a chest drain in accordance with a fourth embodiment of the present invention, the anchoring device being in an open unlocked configuration;
  • Figure 8 is a schematic side perspective view of the anchoring device of Figure 7, the anchoring device being in a closed locked configuration.
  • the chest drain in accordance with a first embodiment of the present invention, comprises a flexible chest tube (4) which is an elongate generally cylindrical hollow tubular member having a distal end (6) for insertion into the chest cavity of a patient and a proximal end (8) for connection to a drainage system (not shown) for collecting fluid drained by the chest drain.
  • the tube (4) is typically made of medical grade plastic or rubber.
  • the tube (4) has a constant internal diameter so as to provide an internal bore of constant width, which would reduce or obviate the likelihood of tube blockage.
  • the tube wall has a thickness typical of known chest drain tubes.
  • the tube (4) in this embodiment has a bend (5) preformed therein, but the tube (4) may be straight.
  • a succession of drainage holes (10) are provided in the cylindrical wall (12) of the chest tube (4) at different radial locations, extending along a portion of the longitudinal length of the distal end (6) of the chest tube, and an end hole (14) is also provided at the distal end (6).
  • These holes (10, 14) are provided for permitting fluid to enter the chest tube (4) from the chest cavity of the patient.
  • a radially outwardly directed ridge (16) formed in the exterior cylindrical surface (18) of the chest tube (4) is provided at least at one location between the distal and proximal ends (6, 8) of the chest tube (4).
  • the ridge (16) extends circumferentially around the chest tube (4).
  • the exterior circumferential surface (20) of the ridge (16) is smoothly contoured in a longitudinal direction of the tube so as to constitute a smooth low profile bulge in the tube side wall, and preferably has a symmetric section about a central transverse plane.
  • the ridge (16) has a height (h) of from 3 to 5 mm and a longitudinal width (w) of from 7 to 15 mm depending on the size of the chest drain, typically providing a height/width aspect ratio of from 0.2 to 0.75, more particularly from 0.25 to 0.5, still more particularly from 1/3 to 3/7.
  • the height (h) is the transverse distance, orthogonal to the tube axis, from the top of the ridge to an extension of the outer surface of the tube where there is no ridge
  • the longitudinal width (w) is the distance along the tube length from one edge of the ridge to the opposite edge of the ridge.
  • Such smooth contouring of the ridge (16) on the external surface of the chest tube (4) provides that when the ridge (16) is inserted into the chest cavity of a patient, the external surface of the portion of the chest tube (4) received within the patient is sufficiently smoothly contoured so as to not to cause additional discomfort to the patient.
  • the chest drain (2) also comprises an anchor piece (30).
  • the anchor piece (30) is supplied separate from the chest tube (4), as shown in Figure 1, and for clarity of illustration is shown enlarged relative to the tube.
  • the anchor piece (30) is fitted around the chest tube (4) at a selected longitudinal position, as shown in Figure 2.
  • the anchor piece (30) has a tight or interference fit to the chest tube (4), and so secures the chest tube (4) to the chest wall of the patient at the selected longitudinal position.
  • the anchor piece (30) is secured to the skin and subcutaneous tissue of the patient by suturing (32), as shown in Figure 4.
  • ridges (16) are provided.
  • three ridges (16) are provided in a longitudinally spaced configuration along the chest tube (4).
  • Plural ridges (16) are provided in this way so as to provide plural mounting points for the anchor piece (30), in turn providing plural choices of intrathoracic drain length and permitting accommodation for patients with large subcutaneous tissue thickness.
  • the anchor piece (30) is typically made of medical grade plastic or rubber, and preferably comprises a single integral moulding.
  • the anchor piece (30) comprises a collar (34).
  • the collar (34) is preferably substantially rigid.
  • the collar (34) has an internal diameter which is substantially the same as, or slightly smaller than, the external diameter of the chest tube (4) at locations between the ridges (16). Accordingly, when fitted to the chest tube (4) at a position slightly on the proximal side of a ridge (16), as shown in detail in Figure 3, any inadvertent relative sliding movement, in a proximal direction, of the chest tube (4) relative to the anchor piece (30), as shown by arrow A, is inhibited by abutment of the collar (34) and the ridge (16). This abutment tends to prevent any sliding movement of the chest tube (4) relative to the anchor piece (30) in the direction of arrow A. Therefore the ridge (16) acts as a stop member preventing movement of the anchor piece (30) along the tube (4) in one direction, while being sufficiently smooth in profile that it can be inserted into the wound cavity without discomfort to the patient.
  • the collar (34) has at least one attachment ring (36) outwardly extending therefrom.
  • two attachment rings (36) are provided, preferably diametrically opposite each other when the collar (34) is closed around the tube (4).
  • the attachment ring (36) defines a closed loop, typically circular or elliptical in shape, so as to provide an attachment for suture.
  • the attachment ring (36) is connected to the collar (34) by a flexible arm (38).
  • Each attachment ring (36) and associated arm (38) is a planar configuration that can be placed flat against the skin of the patient, and the two attachment rings (36) are co-planar.
  • the flexible arm (38) permits the attachment ring (36) to rotate relative to the collar (34).
  • the rotational movement comprises one or both of a pivoting or rotational movement about an axis extending along the arm (38) caused by twisting the arm (38) and a flexing movement caused by bending the arm (38) along its length.
  • This provides a highly flexible connection between on the one hand the attachment ring or rings (36) for the suture (32) and on the other hand the collar (34) and correspondingly the portion of the chest tube (4) fitted within the collar (34).
  • the anchor piece (30) is originally separate from the chest tube (4) and is fitted to the chest tube (4) by the medical operative at the desired longitudinal position.
  • the collar (34) of the anchor piece (30) is openable and comprises two collar halves (40, 42), which are selectively moveable between an open position ( Figure 1) and a closed position ( Figures 2 and 3).
  • the two collar halves (40, 42) are hinged together at a common linear hinge (44) and an interlocking clip (46) is provided at the opposite free ends (48, 50) of the respective collar halves (40, 42).
  • the opposite free ends (48, 50) typically constitute male and female interlock elements of the interlocking clip (46).
  • Each collar half (40, 42) has a respective attachment ring (36) and corresponding arm (38) affixed thereto.
  • the open collar (34) can be fitted around the chest tube (4) at the selected longitudinal position and then the collar (34) can be closed so that the two interlock elements fit together in a secure manner and tightly fit the collar (34) around the chest tube (4) at the desired longitudinal position.
  • the anchor piece (30) is fitted to the tube (4), there is provided a tight fitting between the internal diameter of the anchor piece (30) and the external diameter of the tube (4).
  • chest tubes for chest drains have different bores or diameters with corresponding different lengths depending on the particular clinical requirements of the patient.
  • Typical chest tubes have a diameter from about 0.5 cm to about 2 cm, with typically there being four to five length sizes for a given selected diameter.
  • the diameter of chest tubes is identified using "French sizes".
  • the chest tube (4) may be of small, medium or large bore, as well known to a person skilled in the art.
  • small bore chest tubes have French size 10 to 14, with medium and large bore test tubes having larger diameters.
  • medium bore drains of French size 16 and above have a length of from 40 to 51 cm.
  • the distance from the most proximal hole (12) on the distal end (6) and the first (most distal) ridge (16) would typically be about 13 cm and successive ridges (16) would be approximately 4 cm apart. However, these distances may be varied, depending on the clinical application.
  • the distal end (6) of the chest tube (4) is inserted into the chest cavity of a patient through a wound incision WI in the chest wall until the distal- end of the chest tube is at the desired depth and orientation in the chest cavity.
  • the ridge or ridges (16) distal of the anchor piece (30) is or are inserted so as to be within the body of the patient.
  • the smooth exterior surface profile of the ridges (16) permits ready insertion in this way without causing excessive additional discomfort to the patient.
  • the collar (34) of the anchor piece (30) is securely fitted by clipping around the chest tube (4) at a location on the proximal side of a selected ridge (16) on the chest tube (4) which is located just within the body.
  • Each attachment ring (36) and associated arm (38) can be placed flat against the skin S of the patient. This provides a firm grounding of the attachment rings (36) against the skin. Then sutures (32) are stitched so as to attach the attachment rings (36) to the skin and subcutaneous tissue of the patient.
  • the inserted chest drain (2) is shown in Figure 4. The wound incision is covered by wound dressing material held in place by self-adhesive dressing tape (not shown).
  • the angle between the skin and the tube (4) can be varied by twisting or pivoting of the arms (38) and the provision of the sutures (32) between the attachment rings (36) and the skin permit flexibility in the connection between the body and the chest drain.
  • the provision of the flexible arms (38) permits the selected tube insertion depth and orientation to be securely maintained substantially irrespective of movement of the body of the patient, because such movement of the body of the patient would merely cause twisting of the attachment rings (36) on the arms (38), without causing corresponding movement of the chest tube portion inserted into the body of the patient.
  • the smoothly curved profile of the ridges (16) permits any ridge (16) easily to be inserted into the body of a patient without excessive discomfort, and subsequently can be easily removed from the body when pulled out after use of the chest drain.
  • the smoothly curved profile of the ridge (16) also prevents, by interference of the collar (34) of the anchor piece (30) with the associated ridge (16), the tendency of the chest drain accidentally to be pulled out of the body, either as a result of the weight of the tube, the weight of the connection to the drainage system, or because of inadvertent pulling of the external portion of the chest tube.
  • the avoidance of accidental removal of the chest dram prevents the difficulty and discomfort, both for patient and doctor, of having to go through reinsertion or adjustment of the chest drain position and removal and reapplication of self-adhesive tape.
  • the present invention provides a chest drain which can be securely fitted to the body of a patient in a variety of different configurations. Therefore a single chest drain and securing means may be employed for a variety of different insertion depths.
  • the use of a flexible interconnection between the chest drain and the body of a patient not only provides a secure fitting of the drain, but also is less uncomfortable for the patient and is easier and quicker for medical personnel to insert and remove the drain.
  • the risk of infection also seems to be lowered by the flexible connection of the present invention. This can tend to reduce the length of hospital stay required by a patient.
  • the present invention provides a comfortable and convenient chest drain which may readily be secured to the body of a patient. No special training is required for securing the chest drain after insertion.
  • the chest drain and the associated insertion technique may be applied to a variety of makes, models and sizes of chest drain.
  • the chest drain provides a greater freedom of movement to the patient, for example to attend physiotherapy clinics, which may assist early patient recovery.
  • the avoidance of the need to have large amounts of self-adhesive tape for securing the chest drain permits early recognition of wound infection.
  • a single attachment ring (136), with an associated arm (138), is provided on a collar (134) of anchor piece (130) and the tube (104) is provided with a single ridge (116).
  • the tube of the first embodiment may be used with the anchor piece of the second embodiment, and the anchor piece of the first embodiment may be used with the tube of the second embodiment.
  • the attachment rings (236), with their associated arms (238), may be provided on a collar (234) integrally moulded with, or affixed to, the tube (204) at a predetermined longitudinal position.
  • the tube (204) does not have any ridges as required by the first and second embodiments.
  • an anchoring device (300) for a drain tube assembly (not shown) for draining a body cavity comprising a collar (302) adapted to be fitted around the drain tube (not shown).
  • the collar (302) comprises a locking clip (304) having a central part (306) and two opposed end parts (308, 310).
  • the central part (306) is arcuate, and in particular is generally U-shaped, and has an inner concave surface (312) for fitting around the outer convex surface of a drain tube.
  • the inner concave surface (312) is substantially flat, in the axial direction, thereby to provide a large surface area for frictionally engaging the outer convex surface of the drain tube, and reliably securing the locking clip (304) at a desired longitudinal position along the length of the drain tube.
  • the outer convex surface (314) of the central part (306) has knurls or ridges (316) for manual engagement by a medical operative when fitting the anchoring device (300) to a drain tube. The knurls or ridges (316) prevent inadvertent slippage of the fingers and thumb of the medical operative relative to the locking clip (304).
  • the two end parts (308, 310) comprise complementary interlocking elements which are adapted to be selectively interlocked, to close the locking clip (304) for securing the central part (306) around the drain tube, and unlocked to open the locking clip (304).
  • the two end parts (308, 310) are integral with the central part (306), and the locking clip (304) is composed of a resilient plastics material, for example comprising an injection moulded thermoplastics material.
  • the locking clip (304) is a self-biased spring clip as a result of the resilience of the plastics material.
  • the locking clip (304) In an unbiased position the locking clip (304) is in an open unlocked configuration as shown in Figure 7.
  • the two end parts (308, 310) are separated. This provides an opening (318) therebetween through which a drain tube can be pushed, optionally by separating the two end parts (308, 310) even further by pushing then apart against the spring bias, either for fitting the locking clip (304) to the drain tube to assemble a chest drain assembly or removing the locking clip (304) from the drain tube after use.
  • the locking clip (304) In a biased position the locking clip (304) is in a closed locked configuration as shown in Figure 8.
  • the two end parts (308, 310) are pushed together against the bias of the locking clip (304) and then interlocked by clipping together the two end parts (308, 310), the bias of the locking clip (304) holding the locking clip (304) in the closed locked configuration.
  • the first end part (308) has a curved arm (320) comprising a shoulder (322) attached to the central part (306), a free end (324), and an intermediate elbow (326) therebetween.
  • the elbow (326) has an outer convex surface (328) and an inner concave surface (330), the inner concave surface (330) defining a sharp corner, typically approximately a right angle.
  • a first interlocking surface (331) on the first end part (308) is thereby provided between the inner concave surface (330) and the shoulder (322).
  • the free end (324) includes a curved surface (332), adjacent to the inner concave surface (330), that is curved and adapted to be engageable by a finger or thumb of a user.
  • the curved arm (320) has planar top and bottom surfaces (334, 336) that are parallel, and so the curved arm (320) is straight.
  • the curved arm (320) is located in an offset position relative to the central part (306), being located nearer, in an axial direction, towards a bottom surface (335) than to a top surface (337) of the central part (306).
  • the second end part (310) has a curved arm (338) comprising a shoulder (340) attached to the central part (306), a free end (342), and an intermediate elbow (344) therebetween.
  • the elbow (344) has an obtuse angle. Both an upper arm portion (346) located between the shoulder (340) and the elbow (344) and an extremity (348) of the free end (342) are thicker in the axial direction than a lower arm portion (350) portion between the elbow (344) and the extremity (348). This forms a notch (352) adjacent the lower arm portion (350), the notch (352) being between the upper arm portion (346) and the thickened extremity (348).
  • the notch (352) and the thickened extremity (348) of the free end (342) are aligned, in an axial direction, and preferably coplanar, with the curved arm (320) of the first end part (308).
  • the edge of the thickened extremity (348) facing the notch (352) comprises a second interlocking surface (354) on the second end part (310).
  • the free ends (324, 342) of the first and second end parts (308, 310) are manually squeezed together against the bias of the sprung locking clip (304).
  • the free end (324) of the first end part (308) is twisted in a first axial direction relative to the free end (342) of the second end part (310), causing the first end part (308) to be slid over and past the thickened extremity (348) and, on release, to be captured in the notch (352) by a clipping action.
  • the first and second end parts (308, 310) are thereby interlocked by fitting the curved arm (320) into the notch (352) so that the first and second interlocking surfaces (330, 354) abut.
  • the locking clip (304) is prevented from inadvertent opening by urging, as a result of the spring bias of the first interlocking surface (330) on the first end part (308) against the second interlocking surface (354) on the second end part (310).
  • the first interlocking surface (330) extends over a distance and so the diameter of the central part (306) can vary in the interlocked configuration, thereby accommodating a range of diameters of the drain tube that can be clipped by the locking clip (304).
  • the locking clip (304) can be manually released by the reverse operation, namely by twisting the free end (324) of the first end part (308) in an opposite second axial direction relative to the free end (342) of the second end part (310).
  • the spring bias then causes the first end part (308) to be slid backwards over and past the thickened extremity (348) to open the locking clip (304).
  • the drain tube can then be released, and removed through the opening (318).
  • two attachment rings (360, 362) are integral with the locking clip (304) so as to provide two attachments for suture.
  • a first attachment ring (360) is provided on the shoulder (340) of the second end part (310).
  • a second attachment ring (362) is provided at the end of an extension member (364) extending from the shoulder (340) of the second end part (310).
  • the extension member (364) is generally aligned with the lower arm portion (350) and the thickened extremity (348), thereby forming a channel (366) between the thickened extremity (348) and the extension member (364).
  • the first end member (308) is passed through the channel (366) when locking and unlocking the locking clip (304).
  • the extension member (364) has a free end (368) that includes a curved concave surface (370) that is adapted to be engageable by a finger or thumb of a user. Therefore the locking clip (304) can be closed by manual engagement of both the curved concave surface (332) and the curved concave surface (370) on the first and second end parts (308, 310) respectively.
  • Each attachment ring (360, 362) is flexibly connected to the locking clip (304) thereby to permit rotational movement of the attachment ring (360, 362) relative to the locking clip (304) about any of three mutually orthogonal axes, as shown by the arrows in Figure 8.
  • the attachment ring (360) is connected to the shoulder (340) by an associated flexible integral arm (372).
  • the attachment ring (362) is connected to the extension member (364) by an associated flexible integral arm (374).
  • each attachment ring (360, 362) is provided with a series of angularly spaced indentations (376, 378).
  • the indentations (376, 378) are shaped and dimensioned to hold suture sewn through and around the respective attachment ring (360, 362) in a fixed angular position, This assists the locking clip (304) being securely sewn onto the patient's skin in the desired position without inadvertently working loose over time.
  • the locking clip (304) would be provided to the medical personnel in a sterilised package, optionally packaged together with an associated drain tube.
  • the locking clip (304) would most preferably be disposable, although it could be reusable provided it could be readily sterilised.
  • a disposable locking clip (304) there is a desire to prevent inadvertent or deliberate reuse, in order to reduce the possibility of infection.
  • means are provided to indicate whether or not the locking clip (304) has been used, and means are also provided to inhibit the locking clip (304) from being reused. In other embodiments only one or none of these means may be provided.
  • a frangible tear strip (380) extends across the channel (366). When the first end member (308) is passed through the channel (366) to lock the locking clip (304), the frangible tear strip (380) is broken, and this indicates that the locking clip (304) has been used.
  • a one-way abutment (382) having a ramp surface (384) and a stop surface (386) is also provided in the channel (366).
  • the first end member (308) slides up and over the ramp surface (384) and snaps down, as a relaxation fit, past stop surface (386) into the notch (352).
  • the stop surface (386) of the one-way abutment (382) inhibits or prevents removal of the first end member (308) from the notch (352) when in the interlocked position, and so inhibits or prevents the locking clip (304) from being reused.
  • drain tube assembly has been disclosed with particular reference to a chest drain
  • the drain tube assembly of the present invention may be used for other drain tubes for draining other body cavities that require variable length catheters.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • Public Health (AREA)
  • Anesthesiology (AREA)
  • Hematology (AREA)
  • Engineering & Computer Science (AREA)
  • Veterinary Medicine (AREA)
  • General Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Biophysics (AREA)
  • Pulmonology (AREA)
  • Otolaryngology (AREA)
  • Surgery (AREA)
  • Vascular Medicine (AREA)
  • External Artificial Organs (AREA)

Abstract

La présente invention concerne un ensemble de tube de drainage pour drainer une cavité corporelle, l’ensemble comprenant un tube de drainage flexible muni d’une extrémité distale à insérer dans la cavité corporelle et une extrémité proximale, l’extrémité distale ayant au moins un trou de drainage à l’intérieur et au moins une bague de fixation de manière à fournir une attache pour une suture, la bague de fixation étant reliée au tube de drainage par un bras flexible permettant à la bague de fixation de tourner par rapport au tube de drainage.
PCT/GB2006/000285 2005-01-27 2006-01-27 Ensemble de tube de drainage pour drainer une cavite corporelle Ceased WO2006079827A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US11/795,936 US20080228174A1 (en) 2005-01-27 2006-01-27 Drain Tube Assembly for Draining a Body Cavity

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GBGB0501750.4A GB0501750D0 (en) 2005-01-27 2005-01-27 Drain tube assembly for draining a body cavity
GB0501750.4 2005-01-27
GB0514412.6 2005-07-14
GBGB0514412.6A GB0514412D0 (en) 2005-01-27 2005-07-14 Drain tube assembly for draining a body cavity

Publications (1)

Publication Number Publication Date
WO2006079827A1 true WO2006079827A1 (fr) 2006-08-03

Family

ID=35976569

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2006/000285 Ceased WO2006079827A1 (fr) 2005-01-27 2006-01-27 Ensemble de tube de drainage pour drainer une cavite corporelle

Country Status (2)

Country Link
GB (1) GB2422553B (fr)
WO (1) WO2006079827A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2968845A4 (fr) * 2013-03-14 2017-04-19 Brennan, H. George Canule de drainage ayant une languette d'ancrage

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3375480B1 (fr) * 2017-03-13 2019-10-30 Contract Medical International GmbH Pince de suture
DE102017118820A1 (de) * 2017-08-17 2019-02-21 Joline Gmbh & Co. Kg Katheter für die Dialyse, insbesondere zur Langzeitanwendung

Citations (7)

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US3730187A (en) * 1971-01-22 1973-05-01 V Reynolds Sew-in urethral catheter
US4650473A (en) * 1985-04-15 1987-03-17 Warner-Lambert Company Suturing saddle
EP0345429A1 (fr) * 1988-04-13 1989-12-13 Vaughn L. Durham Collier pour fixer des tuyaux ou des câbles flexibles à usage médical
GB2329340A (en) * 1997-09-20 1999-03-24 Kapitex Healthcare Limited Breathing aid for tracheostomy patients
WO2003051447A1 (fr) * 2001-12-18 2003-06-26 KLÖPPEL, Markus Dispositif de fixation d'un objet tubulaire souple a une partie du corps d'un etre vivant
US20040010232A1 (en) * 2002-07-12 2004-01-15 Brown John Howell Catheter with integral anchoring means
US6682506B1 (en) * 1998-12-22 2004-01-27 Francis Navarro Device for maintaining at least a tube

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Publication number Priority date Publication date Assignee Title
US5188609A (en) * 1991-07-08 1993-02-23 Bryman Medical Inc. Swivel clip medical tube holder
GB9610460D0 (en) * 1996-05-18 1996-07-24 Redmond Anthony D Surgical devices for use in installation of thoracic drainage
US5755225A (en) * 1996-09-30 1998-05-26 Hutson & Associates, Inc. Medical tube-retaining device
US6213979B1 (en) * 1997-05-29 2001-04-10 Venetec International, Inc. Medical line anchoring system
US6948500B2 (en) * 2001-10-11 2005-09-27 Venetec International, Inc. Endo-tracheal tube securement system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3730187A (en) * 1971-01-22 1973-05-01 V Reynolds Sew-in urethral catheter
US4650473A (en) * 1985-04-15 1987-03-17 Warner-Lambert Company Suturing saddle
EP0345429A1 (fr) * 1988-04-13 1989-12-13 Vaughn L. Durham Collier pour fixer des tuyaux ou des câbles flexibles à usage médical
GB2329340A (en) * 1997-09-20 1999-03-24 Kapitex Healthcare Limited Breathing aid for tracheostomy patients
US6682506B1 (en) * 1998-12-22 2004-01-27 Francis Navarro Device for maintaining at least a tube
WO2003051447A1 (fr) * 2001-12-18 2003-06-26 KLÖPPEL, Markus Dispositif de fixation d'un objet tubulaire souple a une partie du corps d'un etre vivant
US20040010232A1 (en) * 2002-07-12 2004-01-15 Brown John Howell Catheter with integral anchoring means

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2968845A4 (fr) * 2013-03-14 2017-04-19 Brennan, H. George Canule de drainage ayant une languette d'ancrage

Also Published As

Publication number Publication date
GB2422553A (en) 2006-08-02
GB2422553B (en) 2007-11-14
GB0601739D0 (en) 2006-03-08

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