central venous catheter (cvc) workbook · central venous catheter (cvc) workbook whht 2017 version...
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Central Venous Catheter (CVC) Workbook
WHHT 2017 Version
Authors
Julia Awad, Sarah Entwistle, Christine Townsend
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Contents
• Introduction
• Aim
• Learning outcomes
• Definition
• Related anatomy
• Indications for use
• Types of CVC • Short term (non tunnelled) • Port-a-cath • Long term (Tunnelled & non tunnelled)
• CVC insertion
• Care and management
• Complications
• CVC removal
• Test questions
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Introduction This workbook is a learning tool for qualified nursing staff who are competent/hold a certificate in intravenous (IV) drug administration.
To determine your competence in CVC IV drug administration, you are required to undertake the following:
• Successful completion of this workbook (2 weeks prior to study day, this is a mandatory requirement)
• Attendance at Trust CVC study day
• Completion of competency assessment document
Maintenance of knowledge and skills should be an ongoing process, and as such it is recommended compency is updated every three years
WHHT documents to be read in conjunction with this workbook.
• Aseptic/Aseptic Non touch technique (ANTT) policy
• Hand hygiene policy
• Prevention of infections associated with venous access devices
Central venous catheter insertion and management in adults & paediatrics
Injectable medicines policy
Blood culture collection policy
Methicillin resistant Staphylococcus Aureus (MRSA) policy
Parenteral feeding in hospital
Tick box to confirm you have read the above policies
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AIM
The aim of the workbook is to provide information and guidance to assist in promoting standardised up to date evidence based care in the management of Central Venous catheters
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Learning Outcomes
• Having completed this work book you will have a fundamental understanding of central venous catheter (CVC) / Central venous access device (CVAD), including:
• Applied anatomy
• Indication for use
• Device selection and insertion
• Care and Maintenance
• Complications and management
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Definition
A central venous catheter is one in which the tip or end of the catheter lies in a large vein of the central circulation such as the lower third of the superior vena cava (SVC), atrio caval junction (ACJ) and upper right atrium. The tip of a femoral catheter lies in the inferior vena cava (Hamilton and Bodenham 2009)
Blood flow around the catheter is maximised and physical and chemical damage to the internal walls of the vein is minimised.
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Related Anatomy
Veins
The function of most veins is to return deoxygenated blood from the organs to the heart.
They are classified in a number of ways, including
• Superficial veins are closer to the surface of the body, and have no corresponding arteries.
• Deep veins are deeper in the body and have corresponding arteries.
Most veins are equipped with valves to prevent backflow of blood. The superior vena cava, does not contain valves
Although translucent the colour of a vein can be affected by the characteristics of a person's skin, oxygen concentration in the blood, and size and depth of the vessel.
Vena cava.
The superior (SVC) and inferior vena cave (IVC) are the biggest veins in the body, and enter the right atrium of heart from above (SVC) and below (IVC)
(Flewell, R 2017)
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Vein Structure
Veins consist of three main layers. Tunica adventitia or tunica externa is the outer layer of connective tissue Tunica media the middle layer of smooth muscle. In comparison to an artery the muscle layer is much thinner therefore easier to collapse and distend under pressure. Tunica intima the inner layer lined with endothelial cells and folds to form the valves.
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Indications For Use
Prolonged intravenous (IV) therapy • Chemotherapy
• Antimicrobials
• Parenteral Nutrition (PN)
• Blood and blood products
Difficult IV access
Frequent blood sampling
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Types of CVAD
• Short term (non-tunnelled)
• Tunnelled (Hickman)
• PICC
• Port-a-Cath
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Types of CVAD
Type of Catheter Length of Therapy Type of Treatment Other considerations
Non Tunnelled Usually < 3 weeks. These are left in according to the patients needs with regular review (VIP Score)
Short Term intensive IV therapy, inpatient use only, CVP monitoring, multiple infusions
Antimicrobial impregnated catheters for adults requiring <3 weeks IV therapy and who are at increased risk of infection
PICC Indefinitely. According to patient‟s needs and device function.
Long term IV therapy, TPN. Requires suitable vein near Antecubital fossa for insertion (unless ultrasound) Made of silicone or polyurethane and normally valved.
Tunnelled, cuffed Patient dependent but up to 2 –3 years Long term, intermittent IV therapy. TPN.
Dual lumen for Haematology treatments if necessary
Tunnelled, uncuffed
Short term < 2 weeks Parenteral Nutrition Requires suitable securement and exit site monitoring
Apherisis/ Dialysis Indefinitely according to patients needs and function of line
Apheresis and dialysis only
Implanted Ports Many years Intermittent long term IV therapies.
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Insertion
• Informed consent should be obtained
• Procedure must be performed by a trained, competent practitioner using an aseptic technique
• Performed only in a designated clean environment (ICU/ theatres)
• Use of ultrasound guidance recommended by NICE
• MRSA screen should be performed prior to insertion
• Optimal aseptic technique includes hand decontamination, sterile gloves, hat and mask
• Skin should be prepared using 2% chlorhexidine gluconate with 70% alcohol (3ml)
• The patient should be observed for signs of dyspnoea, agitation and restlessness
• Once inserted each lumen should be aspirated and flushed with normal saline
• The device should be secured with sutures or an adhesive device
• The site should be dressed with a transparent semi-permeable membrane dressing which has been impregnated with chlorhexidine
• Lines must be x–rayed post insertion to confirm the tip position before use
• Insertion line details should be recorded on a central line high impact intervention form (Care Plan)
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Care & Management
• Hands should be clean and decontaminated with an alcohol based hand rub
• Site to be covered with a transparent, semi-permeable polyurathane dressing with chlorhexidine impreganted sponge
• If site is bleeding, or the patient is sweating profusely, use a sterile gauze dressing. Replace with the transparent dressing as soon as possible
• Dressings should be changed every 7 days, or when visibly soiled
• Dressings should be changed using an aseptic technique. Insertion site to be cleaned with 2% chlorhexidine gluconate in 70% alcohol (Chlorprep) and allowed to dry
• All ports should be capped off with a needle free access device. These should be changed as per manufacturers guidance
• Prior to accessing a port it should be cleaned for at least 15 seconds with 2% chlorhexidine gluconate in 70 % alcohol (sanicloth PDI wipes)
• At least 12 hourly observations for signs of infection
• No routine replacement of the line
• The need for the line should be assessed daily
• The line should be removed when no longer clinically indicated
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Care & Management
Line patency
• For unvalved lines, the line should be clamped (unless administering or withdrawing fluid)
• Wash hands and wear gloves and apron before accessing the catheter
• The catheter should be secured to the skin away from the exit site
• The catheter should be checked regularly for mal-position and signs of fracture, leakage and redness/swelling at the site
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Care & Management Accessing the Line • Use a sterile non-touch technique • To use a port:
• It should flush with ease • You should be able to withdraw blood • The patient should not experience
any discomfort during flushing • Check for any other complication
Flushing: • Use a (minimal) 10 ml syringe • Flush with 0.9% sodium chloride • Use a brisk ‘push – pause’
technique • Clamp the line while the final ml of
flush is being injected • Do not routinely withdraw and
discard blood from the catheter before flushing (unless vasoactive drugs are in the line)
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Care & Management
Audit
• Central line high impact intervention form (Care Plan) should be completed every 12 hours – and when the line is accessed.
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Complications
• Infection
• Line Occlusion Persistent withdrawal Occlusion
Complete Occlusion
• Thrombosis
• Air Embolism
• Catheter Migration
• Catheter fracture
• Extravasation
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Types of CVAD Infection
Exit site infection
• Erythema at exit site and/or tracking along skin tunnel
• Swelling
• Pain
• Discharge / exudate at exit site
• Pyrexia
• Positive external swab
Catheter lumen infection
• Pyrexia
• Generally unwell
• Rigor during or post line flush
• Sepsis / neutropenic sepsis
• Bacteraemia – POSITIVE BLOOD CULTURES.
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Infection
Management
• Report to medical team (who discuss with microbiology)
• Take blood cultures if temperature is > 38 (all lumens plus peripheral)
• Swab exit site
• Remove line if clinically indicated
• If line is to be replaced use a new site
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Persistent Withdrawal Occlusion (PWO)
Causes
• Malposition of catheter tip
• Catheter tip sucking up to vein wall with aspiration
• Blood clot, fibrin sheath obstructing end of lumen
• Incorrect technique when flushing catheter /disconnecting syringe
• Pinch off syndrome
Signs
• Inability to withdraw blood, but still able to Flush
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Persistent Withdrawal Occlusion (PWO)
Management
• Get patient to change position/cough to alter intrathoracic pressure and aid line movement
• Ask patient to lift arm on side of catheter placement to exclude ‘pinch off’ syndrome - confirm on chest Xray
• Use of thrombolytic agents
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Complete Occlusion
Causes
• Possible thrombus formation -Catheter can become blocked if not adequately flushed
• Solution precipitate - Catheter can become blocked if fluids are incompatible
• Catheter kinked!
Signs
• Inability to both draw blood and Flush
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Complete Occlusion
Management
• Manipulation of clamp site to check line is not kinked or clamped
• Gently attempt to flush with saline using push/pull technique NEVER use force as this can result in catheter fracture and potential embolus
• Get patient to change position/cough to alter intrathoracic pressure and aid line movement
• Ask patient to lift arm on side of catheter placement to exclude ‘pinch off’ syndrome - confirm on chest Xray
• May require use of thrombolytic agent (as per hospital policy)
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Fibrin Formation
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Thrombosis
Causes
• Size of catheter – Catheter too large for the vein in which it is placed
• Fibrin mesh formation around the catheter can result in the formation of a blood clot
• Traumatic insertion or catheter malposition
• Pre-disposing factors (clotting disorders)
• Catheter tip malposition
Signs
• Swelling in hand, upper limbs or neck
• Skin discolouration, cyanosis
• Raised collateral circulation
• Pain
• Sensation changes in catheter arm / hand
• Looks like Phlebitis – usually with more swelling.
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Thrombosis
Investigations &Treatment
• Inform Medical Team
• Doppler Ultra Sound
• Anticoagulation
• Line removal if venous return is compromised - otherwise leave in situ
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Thrombosis
Investigations &Treatment
• Inform Medical Team (Discuss with haematology Reg)
• Doppler Ultra Sound
• Anticoagulation
• Line removal if venous return is compromised - otherwise leave in situ
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The hospitalist.org
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Air Embolism
Causes
• Catheter port left unclamped
• Catheter lumens/extension sets not flushed prior to insertion
• Incorrect removal technique
• Catheter fracture
• Accidental damage (scissors)
Signs
• Respiratory Distress
• Reduced oxygen saturation
• Cyanosis
• Mental status changes (confusion/ loss of consciousness)
• Tachycardia
• Hypotension
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Air Embolus Management
Medical emergency
• Call for immediate medical assistance
• Give Oxygen
• Monitor vital signs
• Clamp above damage
• Be prepared for CPR
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Catheter Migration
Causes • Insufficient securing of catheter • Poor technique when removing dressing • Accidental removal Signs • Increased external length of catheter • Visible cuff (tunnelled lines) • Broken securement sutures • Inability to withdrawal blood • Buzzing/ Strange sensation around ear when CVC is flushed
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Catheter Migration
Management
• NEVER try to reinsert a migrated catheter
• Secure line. Do not push back into vein. Do not use line
• Inform Drs/CNS Vascular Access
• Send patient for CXR to determine tip position
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Accidental Removal Causes
• Poor securement (including dacron cuff)
• Traction to line (trapped/pulled)
• Poor communication regarding continued use of line
Management
• Apply pressure dressing
• Observe for any signs of air embolus or excessive bleeding.
• Ensure full length of line removed (if this cannot be determined patient to have CXR to exclude catheter fracture)
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Catheter Fracture
Can be internal or external
Causes
• Pulled or stretched catheter
• Excessive force when flushing/administering IV’s
• Incorrect syringe size (never less than 10ml)
• Accidental damage
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External Catheter Fracture
Split or hole in external part of catheter
Signs and Symptoms
• Damage may be visible
• Signs of fluid leaking out
• Air bubbles in syringe if withdrawing
Management
• Clamp line between fracture site and insertion site
• Tape securely with sterile tape or occlusive dressing.
• Seek immediate medical help
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Internal Catheter Fracture
Signs & symptoms
• Ragged tip on removal
• Extreme SOB or cyanosis
• Patient looks unwell, hypotension, tachycardia, obvious signs of shock
Management
• Give O2 (Emergency situation)
• Seek immediate medical help
• Keep patient calm and stay with patient until help arrive
• Be prepared for CPR
• Internal fracture resulting in catheter embolism will require surgery or snaring
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Catheter Fracture
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Extravasation
Inadvertent administration of a drug into the surrounding tissues, rather than into the vascular pathway as intended.
(Allwood, Stanley and Wright 2002)
Signs
• Burning, stinging, pain around the entry or exit site of a CVAD or along any part of the skin tunnelled section.
• Induration, erythema, venous discolouration, swelling or leakage at the injection/cannula site.
• Discolouration alone may not indicate extravasation.
• Loss of blood return. (Although blood return is not always a reliable indicator)
• Absence of free flow of infusion, or increased resistance to the administration
of the drug.
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Extravasation
Management
• Stop drugs immediately, withdraw drug from the line.
• Seek medical advice
• Follow guidance in Trust Extravasation policy (cytotoxic or non-cytotoxic drugs)
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CVC Removal
Indications
• No longer required
• Infection (following advice from microbiology)
• Line complications
• Patient choice
• Request for removal must be documented in the medical notes
• Informed consent should be obtained
• Procedure must be performed by a trained, competent practitioner using an aseptic technique (appropriate to the type of line)
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References/ supportive Literature
• Allwood M, Stanley A, Wright, P (Eds) (2002 )The Cytotoxic Handbook 4th Edition Radcliffe Medical Press Ltd Oxford
• Doherty, L & Lister, S (eds) (2015).Royal Marsden Manual of Clinical Nursing Procedures (9th Edition). Wiley-Blackwell. Chichester.
• Epic3: National Evidence-Based Guidelines for Preventing Healthcare-Associated Infections in NHS Hospitals in England. Journal of Hospital Infection 86S1; S1–S70
• Flewell, R ( 2017) Catheter Management Education. Genentech USA (www.cathmatters.org accessed 8/1/2017)
• Hamilton and Bodenham (Eds) (2009) Central Venous Catheters 1st Edn Wiley-Blackwell Publishers UK
• Loveday, H.P et al (2014) Epic 3: National Evidence –Based Guidelines for Preventing Healthcare- Associated Infections in NHS hospitals in England. Journal of Hospital Infection, 86S1, S1-S70.
• National Institute Clinical Excellence (2002). Ultrasound Imaging of Central venous Catheter Placement. NICE. London.
• Royal College of Nursing (2016) Rapid Evidence Review foir the RCN infusion therapy standards: a summary. RCN. London.
• Scales, K (2010) Central Venous access Devices Part 1: devices for acute care. British Journal of Nursing, 9, (2), 88 – 92.
• www.the-hospitalist.org/hospitalist/article124028/what-best-approach-treat-upper-extremity-DVT.
• West Hertfordshire Hospitals NHS Trust (2016) Policy for Central Venous Catheter Insertion and Management in Adults and Paediatrics.
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Thank you.
• Now please scroll back if you are using the e-module and take a test prior to attending the study day.
Or
• If you are reading the workbook then log onto the e-learning website using the following link and attempt the test online.
http://www.westhertshospitals.nhs.uk/training/cvsstudyday.asp
Many Thanks and best of luck
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