With the central venous catheter of electrocardiosignal instruction catheter position functionTechnical field
The present invention relates to biology, medical science, medical instruments field via the conduit of blood vessel delivering medicament, particularly through peripheral vascular central venous catheter.
Background technology
Central venous catheter is mainly used in the infusion of drug path setting up human vas, can also be used for extracting venous blood.Inserting central venous catheter (Peripherallyinsertedcentracatheter, be called for short PICC) through periphery, is through periphery ancon shallow venipuncture, is placed in by catheter tip superior vena cavally to put pipe new method.Puncture point is at periphery superficial vein, and underlying pipe directly perceived, operates comparatively deep vein puncture simple, can be operated separately by nurse.Have that operation sequence is simple, safety, puncture success rate are high, little to patient trauma, few intercurrent disease, does not affect orthobiosis, the advantages such as mental pressure is little, acceptant.In wide clinical application in Rescuing Critical Patients, chemotherapy of tumors, vein parenteral nutrition, long-term infusion, the patients such as child infusion are a safety, quick, respond well venous transfusion approach.
Existing PICC pipe, needs when puncture and intubation to take the photograph sheet by X-ray machine, determines the position of conduit in superior vena cava.Therefore patient must be subject to the harm of X-radiation.Meanwhile, when operation in the wild or war front first-aid patients, scene does not often have X-ray machine, which limits accurately inserting of central venous catheter.Due to above reason, urgent clinical needs one can be able to not avoid x-ray bombardment to endanger by X-ray machine, patient, just can smoothly, accurately complete the novel central venous catheter inserted.
Summary of the invention
The object of the invention is: propose the Novel warp peripheral central venous catheter that one just can not can complete smoothly and insert superior vena cava by x-ray bombardment, determine conduit position in the blood vessel.
The head end tubing matter of the central venous catheter that the present invention proposes has conductive characteristic, or the head end pipe inside of central venous catheter is embedded with the conducting metal spring wire of certain length, and conducting metal spring wire is extended to head end tube outside, can directly contact blood and tissue.
Have guide wire in conduit, guide wire contacts with the conduction head end pipe of central venous catheter.This contact can be direct CONTACT WITH FRICTION, also can be can the conductive contacts of conducting solution by medicine, blood etc.After conduit inserts vein, the tail end of guide wire stretches out run and is connected with electrocardiograph.When central venous catheter is deeply to superior vena cava, arrive certain position, electrocardiograph will detect " P ripple ", the appearance of this electrocardiosignal feature can be clear and definite indicate the position that central venous catheter arrived, so patient no longer can need x-ray bombardment when putting pipe operation, namely no longer need the use of X-ray machine just can be placed to rear arrived position by clear and definite conduit, complete and put pipe.
Common central venous catheter is divided in order to two parts by the present invention: head end pipe and main body tube.Head end pipe has conductive characteristic.By head end pipe and main body tube welding or be bonded as one during making.Main body tube is conduction or non-conductive material.The length ratio of head end pipe and main body tube needs to determine by actual clinical.
The central venous catheter that the present invention proposes, except having the function of generic central venous duct, also with this symbolic characteristic of intracardiac electrical signal detection, is novel complex function central venous catheter.Propose novelty to the using method of central venous catheter to change.Make the range of application of conduit more extensive by this innovation, the patient of such as phenolics can not accept x-ray bombardment, just can select the central venous catheter provided in the present invention.Simultaneously for the first aid situation not having X-ray production apparatus, just can complete by electrocardiograpies such as cardioscribes and put pipe operation accurately.
Accompanying drawing illustrates:
Fig. 1 is structural representation of the present invention
1, head end pipe; 2, main body tube; 3, guide wire
Fig. 2 is head end pipe sectional view of the present invention
Fig. 3 is the head end duct ligation composition of the embodiment of the present invention 2
4, wire of spring; 5, tinsel
Fig. 4 is the overall structure schematic diagram of the embodiment of the present invention 2
Fig. 5 is the ECG signal that application the present invention detects
Detailed description of the invention:
Comprehensive, the central venous catheter with electrocardiosignal instruction catheter position function provided by the invention has this architectural feature of conduction head end pipe.
Embodiment 1:
In structural representation of the present invention shown in Fig. 1,1 is head end pipe, and material is the macromolecular material such as silicone rubber, polyurethane with conductive characteristic.2 is main body tube, and material is silicone rubber or polyurethane etc., and main body tube can be made into conduction or non-conductive according to clinical demand.3 is guide wire, and it penetrates central venous catheter inner chamber, can directly or indirectly contact with the head end pipe of conduction.Guide wire tail end is connected with electrocardiograph, to detect intracardiac electrocardiosignal;
Figure 2 shows that the sectional view contacted with the head end pipe of conduction after guide wire penetrates central venous catheter, guide wire tail end exposes conduit portion and is connected with electrocardiograph, can detect electrocardiosignal.When central venous catheter puts pipe operation, whether there is corresponding electrocardiosignal by observing electrocardiograph, the position that conduit arrives can be determined;
The making of head end pipe of conducting electricity in the present embodiment can adopt the silica gel tube conductive material such as argentum powder, graphite powder of adulterating to extrude and make, and concrete doping ratio configures according to clinical demand.
Embodiment 2:
Fig. 3 is another embodiment of central venous catheter of the present invention.4 for embedding the wire of spring inside head end pipe, and wire of spring has and stretches out head end pipe until the tinsel 5 of conduit outer wall, and the tinsel outside conduit and conduit outer wall are fully fitted, and realizes blood that guide wire and head end pipe touch, organizes and be conducted.Embed metal spring silk inside head end pipe after, the material of head end pipe own can be nonconducting macromolecular material, can be also the macromolecular material of conduction, as conductive rubber, and electric silica gel, conductive polyurethane etc.;
Fig. 4 is the overall structure schematic diagram of embodiment 2;
Fig. 5 applies the ECG signal detected when above-described embodiment inserts central venous catheter, thus indicates the required in-position of conduit arrival.