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Acute Kidney Injury and Intravenous Fluid Therapy PowerPoint Presentation

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This medical PowerPoint presentation talks about Acute kidney injury (AKI), a sudden decrease in kidney function that can occur as a result of various factors, such as dehydration, sepsis, medication toxicity, or inadequate blood flow to the kidneys. Intravenous (IV) fluid therapy is often used to treat AKI and prevent further damage to the kidneys.

The goal of IV fluid therapy in AKI is to maintain adequate blood flow to the kidneys and prevent further damage by ensuring that the body is properly hydrated. The type and amount of fluids used depend on the underlying cause of the AKI and the patients overall health status.

Tags : Acute kidney injury, AKI, decrease in kidney function, Intravenous (IV) fluid therapy, critical care medicine, critical care medicine PowerPoint presentation

Published on : Mar 28, 2023 | Views : 1230 | Downloads : 8

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Slide 1-

Acute care toolkit 12Acute kidney injury and intravenous fluid therapy
Slide 2-

Definition and staging of AKI The term ‘acute kidney injury’ (AKI) replaces the term ‘acute renal failure’ Even seemingly minor changes in serum creatinine levels are associated with a significant increase in mortality AKI should be regarded as a spectrum of injury that may progress to organ failure
Slide 3-

Definition and staging of AKI
Slide 4-

Causes of AKI
Slide 5-

Risk factors for AKI AKI occurs most commonly in patients who are at risk, who either are acutely ill or have had major surgery Recognition of those at risk of AKI allows simple preventative measures, eg ensuring adequate hydration Patients at risk of AKI should be aware of the risk of AKI developing in certain situations and actions to be taken, eg temporary cessation of drugs that may exacerbate hypovolaemia and/or hypotension
Slide 6-

AKI warning systems In March 2015, NHS England mandated that all NHS trusts in England must have biochemistry department laboratory systems that issue an AKI warning, based on rises in serum creatinine level, for patients in secondary care Each trust must determine how they communicate this AKI warning to clinicians caring for individual patients, eg e-alerts, AKI care bundles, AKI outreach teams
Slide 7-

Recognised risk factors for AKI Age >75 years Pre-existing CKD (eGFR <60 mL/kg/1.73 m2) Previous episode of AKI Debility and dementia Heart failure Liver disease Diabetes mellitus Hypotension (Mean arterial pressure <65 mmHg, systolic pressure <90 mmHg) Sepsis Hypovolaemia Nephrotoxins, eg gentamicin, NSAIDs, iodinated contrast Antihypertensives in setting of hypotension, eg ACE inhibitors, loop diuretics
Slide 8-

Initial investigation of AKI Urea and electrolytes, and creatinine Bicarbonate Full blood count – if platelets low, request blood film/ lactate dehydrogenase (to diagnose haemolytic uraemic syndrome/ thrombotic thrombocytopenic purpura) Liver function tests (to diagnose hepatorenal syndrome) Ca2+/PO43– (to diagnose myeloma) Creatine kinase (to diagnose myeloma) Blood cultures (if sepsis suspected) Urinalysis – if blood, protein, leucocytes or nitrites, send midstream urine Ultrasound scan of renal tract and bladder if obstruction expected, scan within 24 h if pyonephrosis suspected, scan within <6 h
Slide 9-

Management of AKI
Slide 10-

Intravenous (IV) fluid therapy Any dehydrated patient is at risk of AKI, particularly in the setting of acute illness For any patient who is fasting for over 12 h or in whom losses of fluid cannot be matched by parenteral intake, parenteral fluids must be commenced
Slide 11-

Assessing fluid status Prior to any prescription of IV fluids, the patient should have a volume assessment that includes the following parameters Capillary refill Pulse rate Blood pressure (including postural drop) Jugular venous pressure Respiratory rate Oedema – pulmonary or peripheral Passive leg raising test Fluid balance chart review Weight (trend important)
Slide 12-

Classification of IV fluid therapy NICE recommends that assessment of a patient’s fluid balance should be part of every ward round It also recommends that IV fluid therapy is classified as resuscitation, replacement or routine maintenance, and that any prescription should clearly identify which type of IV fluid therapy the patient is receiving
Slide 13-

Classification of IV fluid therapy
Slide 14-

Initial fluid resuscitation NICE recommends that fluid resuscitation is best approached with a crystalloid solution rather than a colloid Moat experts would recommend a balanced crystalloid (eg Hartmann’s, lactated Ringer’s or Plasma-Lyte 148), because excessive amounts of 0.9% sodium chloride can result in hyperchloraemic metabolic acidosis The only exception is rhabdomyolysis, when 0.9% sodium chloride would be preferred initially because of the risk of hyperkalaemia
Slide 15-

Algorithm for initial fluid resuscitation
Slide 16-

Composition of IV fluids It is important to know the electrolyte content of fluid prescribed
Slide 17-

IV fluid challenges An IV cannula of adequate size to infuse the fluid at a high enough rate must be used (usually at least a 20G cannula and infusion of 250–500 mL over 5–15 minutes) Responsiveness to the fluid challenge should be assessed by regular monitoring of blood pressure and pulse rate
Slide 18-

Responding to the fluid challenge If there is an improvement in either blood pressure or pulse rate that is poorly sustained, the fluid challenge should be repeated If haemodynamic stability is restored and the patient is deemed euvolaemic, the type of IV fluid prescribed should be reviewed If there is no improvement after two accurately performed fluid challenges, the patient should be reviewed and, when appropriate, their care should be escalated for senior review and possible involvement of critical care
Slide 19-

Routine maintenance IV fluids Rules for prescribing routine maintenance IV fluid therapy include: IV fluid should be given via volumetric pump if a patient is on fluids for over 6 h or if the fluid contains potassium Always prescribe as mL/h, not ‘x hourly’ bags Never give maintenance fluids at more than 100 mL/h Never prescribe fluids for more than 24 h at a time
Slide 20-

Routine maintenance IV fluids
Slide 21-

Complications of AKI
Slide 22-

Referring to a nephrologist Management of AKI should be discussed with a nephrologist as soon as possible, and within 24 h of detection when one or more of the following is present A possible diagnosis that may necessitate specialist treatment (eg vasculitis, glomerulonephritis, tubulointerstitial nephritis or myeloma) AKI with no clear cause Inadequate response to treatment Complications associated with AKI AKI stage 3 A renal transplant Chronic kidney disease (CKD) stage 4 or 5
Slide 23-

Patient recovery Patients recovering from a significant episode of AKI may develop profound diuresis, resulting in a free water deficit, hypernatraemia and/or hypokalaemia During this phase, maintaining patient hydration and replacing electrolytes are of paramount importance Accurate fluid balance with daily weights is very important to prevent patients from becoming dehydrated as they recover from AKI
Slide 24-

Discharge planning Patients who have had AKI are at risk of developing CKD in the long term (this risk depends on the severity of the episode of AKI) Patients’ kidney function should be checked prior to discharge Refer patients to nephrology if they are discharged with an eGFR <30 mL/min/1.73 m2 Medications should be reviewed prior to discharge, with a plan to reintroduce medications that may have been held during the acute illness (this may require an early follow-up with the patient’s GP) Discharge letters to the GP should include: severity of AKI cause of AKI risk factors for AKI kidney function on discharge advice on whether medications need to be reviewed or reintroduced
Slide 25-

Educational resources An app developed by the Royal College of Physicians of Edinburgh that is free to download www.rcpe.ac.uk/policy-standards/acute-kidney-injury-app An AKI core competency framework for healthcare professionals, endorsed by the Academy of Medical Royal Collegeswww.aomrc.org.uk/doc_details/9503-acute-kidney-injury-a-competency-framework The RRAPID app and e-book, which contain an AKI risk calculator and a NEWS calculatorhttp://rrapid.leeds.ac.uk
Slide 26-

The RCP produces a series of acute care toolkits on a range of topics including All the toolkits, including the full version of Acute toolkit 12: Acute kidney injury and intravenous fluid therapy, can be accessed at www.rcplondon.ac.uk/resources/acute-care-toolkits Handover Teaching on the acute medical unit Acute oncology on the acute medical unit Ambulatory emergency care Sepsis Acute medical care for frail older people
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