Venue: University Hospital Southampton
Summary: Dr Phil McGlone
Trevor Smith Cons Gastro UHS.
- Gastric residual volume less than 200mls not evidenced based
- Only one study suggests that less than 500m is safe
- All PN vs EN trails are of high versus low volume feeding.
- The meta analysis from the early 2000’s are based on old, outdated trials and probably have little if any relevance to care in the ITU today.
Practical aspects of prescribing nutrition Mark Tomlin Cons Pharmacist
Malnutrition Universal Screening Tool (MUST)
1 - Score for low BMI (20, 18.5-20, <18.5)
2 - Score for recent weight loss (5%, 5-10%, >10%)
3 - Score for poor nutrition for last 5 days, or likely to be poor for over 5 days.
1+2+3 Score > 2 Identifies high risk patients
40% of hospital patients are malnourished and this is linked to slow recovery and poor wound healing. ICU patients may loose 10% of their muscle mass each week.
Is it evolutionary that we don’t eat when acutely unwell?
MUST score quantifies detection of malnourished patients for dietetic support (>2 implies refer)
Patients who are not eating oral foods normally get referred to dieticians
If still not eating orally, consider enteral tube feeding (NG, NJ, PEG).
Document length of enteral tube at nostril
Note position check. pH <5 aspirates (H2A,PPI) and X-ray
Use of a size 8fr will aid aspiration. Use a fine bore tube unless continuously high gastric aspirates and patient is at risk of aspiration
30 degree elevation to avoid reflux and aide diaphragm movement
Macronutrients - Normal
- 25-35kcal/kg/day total energy ave. 70kg = 1750-2450
- 1kcal per kg/hr (actual body weight)
- 6.2G protein = 1G Nitrogen
- (0.13-0.24G nitrogen) per Kg/dayave. 70kg = 9.1-16.8G N/day
- 30-35ml/kg/day fluid ave 70kg = 2.1-2.5L/day =>85-100ml/hr
- Fibre as appropriate
Macronutrients – Acutely unwell
- Energy total – 1500-2000 kcal/day, ideally 1:1 CHO to fat ratio
- Protein – 7-12 G N/day
- Fluid – 1-2.5L/ day, 40-100ml/hr
- However always first bag over 48hrs
- Not on same day of operation due to SIRS
- What can a sick or under-perfused liver utilise, before jaundice or ALP rise
- Bariatric patients still need feeding. Stress of ITU is not the time to diet. ABW for 1kcal/Kg/hr? (Obese IBW +25%)
- Increase rate of enteral feed in increments of 30ml/hr if gastric residuals remain <250ml at 4hrly aspirates
- Continuous feeding or physiological breaks?
- Achieving targets
- Phenytoin, doxy, cipro. Other IV/oral conversions
- TPN vs PN/EN do you believe in a trickle?
- Start at 30ml/hr standard feed
- Aspirate after 4 hours, if less than 200ml replace and increase by 30ml/hr until full rate (70-90ml/hr).
- If more than 200ml aspirate replace 200ml, discard remainder and decrease rate by 30ml/hr to minimum 10ml/hr
- At 10ml/hr, continue for 24 hours then add metoclopramide
- If still not absorbing after 48 hours, reduce opioid if possible to Morphine < 5mg/hr or Fentanyl < 2ml/hr
- add Erythromycin 500mg BD IV/NG
- After 48 hours (OR day 5) consider TPN
- Last resort, not an emergency
- Unstable mixtures, incompatible with other drugs, dedicated line
- Risk of line insertion
- Audit of line placement and X-ray check
- Plan for more than 5 days, or persevere with Enteral
- EN 10ml/hr to avoid gut atrophy and translocation
- Phased introduction of PN over 48 hours
- Phased re-introduction of enteral
- Reliable EN for 24 hours before stop PN
- Poor nutrition previous week –obvious and oesophagectomy, post op. actual calories
- Previous nutrition status (BMI<18.5kg/m2)
- Recent wt loss > 10% in 6 months
- Alcoholics, drug abuse, IDDM, laxatives, antacids, diuretics, cytotoxics
- Start with 10kcal/kg/day (70kg=700kcal)
- Slow increases
- Thiamine 200-300 (Pabrinex 250) per day
Vitamins & Minerals
Vitamin B compound Strong (2TDS RFS)
Vitamin C 500-1000mg/day (Pabrinex 500)
Selenium ACE 1 daily
Solvazinc 1 TDS
Sanatogen A-Z 1 daily
Folic Acid 5-10mg
Vitamin B12 – Hydroxocobalamin 1mg IM/IV
Don’t fiddle with the food to manage the fluid
Central preferred – but PICC, or peripheral
Maintenance - High flow
Minimal interruption – discuss
Not usually haemofiltration Lines
Expected other drugs, compatibility reshuffle
New Line – last option due to risks of insertion
Monitoring central lines
Parenteral nutrition is not a preferred option, it is undertaken when enteral is not possible.
Many of the problems of PN are due to gut atrophy, i.e. a lack of EN. Thus wherever possible give 10ml/hr EN to maintain gut integrity. PN for feeding the patient, EN for feeding the gut thus TPN is no longer appropriate
PN increases the infection risk but not mortality
PN is a planned event when EN has failed for 5 days. It is an inherently unstable mixture, takes 3 hours to make and costs about £100/day
Indirect Calirometry, Glutamine, & Selenium - Richard Lowe ST4 ICM
TEE - total energy expenditure
BEE – Basal energy expenditure
REE – Resting energy expenditure
DIT – Diet induced thermogenesis
AEE – Activity energy expenditure
TEE = (BEE + DIT + AEE)
RQ – respiratory quotient
CO2 produced (VCO2) / O2 used (VO2)
Normal range 0.7 – 1.2
Dependent on fuel source
Carbohydrate - 1
Protein - 0.8
Fat - 0.7
Production of chemical energy proportional to gas exchange
Weir equation used to calculate energy expenditure
Energy expenditure = (3.9VO2 – 1.1VCO2) – 2.17(urinary N2)
Abbreviated weir equation used
REE = (3.94 x VO2) + (1.1 x VCO2)
BEE may be significantly altered in critical illness
Obligatory feeding – PN
PN often results in overfeeding
Liver function abnormalities
EN often associated with feeding intolerance
BMR increased up to 40% in critical illness
Burns and trauma patients known to be heavily catabolic
Indirect calirometry (metabolic cart)
Substitute for calirometry (cumbersome / expensive)
Measures inspired & expired gas flows / volumes and concentrations (CO2 /O2)
Non invasive and accurate
Intensive Care Medicine Feb 2011
Randomized but unblinded
Mechanically ventilated for at least 3 days
Patients over 18
Expected to be ventilated > 3 days
Enteral nutrition with an energy target determined by INDIRECT CALIROMETRY
25 kcal/kg/day of enteral nutrition
PN used to supplement EN when needed
Primary outcome – 30 day survival
Length of mechanical ventilation
New pressure sores
Unplanned surgery / surgical complications
Assigned within 48 hours
REE calculated by IC
Deltatrac 2 monitor used
Fed enterally as per protocol
PN used to make up shortfall
Weight from patient / relative
IC measurements taken also
PN to make up shortfall from EN
Study group received more calories than measured to need
Control received less calories than calculated to need
Mean calorie intake significantly higher in study group
Study group patients had higher mean energy and protein intake
Significantly more in study group had PN in days 1 – 3
Trend towards lower mortality in study group with “intention to treat” p = 0.058
Significantly lower mortality for study group when “per protocol”
Hospital (28.5% v 48.2% p = 0.023)
60 day (57.9 +/- 9.9% v 48.1 +/- 7.6% p = 0.023
Similar ICU mortality
Increased length of ICU stay
Increased ventilation days
More total infections
Trend towards higher VAP
Dietician led care
Relatively small numbers
Could it be related to type of feeding
Was it just that they were fed more
Calculated energy requirements looked quite good
Feed (EN or PN) enriched with pharmaconutrients to
IMPROVE IMMUNE RESPONSE
MODULATE INFLAMATORY RESPONSE
Critical illness response
Oxidative stress and SIRS – free radicals, inflamatory cascade
Mitochondrial damage – contributing to MODS
Vitamins and trace elements taken into organs for protein and immune cell production
Relative deficiency of antioxidants
Non essential amino acid
Participates in many metabolic processes
Increased utilisation in critical illness
Plasma levels decrease
Low glutamine shown to have worse outcomes in some studies
Oudemans-Van Straaten 2001 Int Care Med (n = 25)
Favourable outcomes in burns patients – reduced bacteraemia, mortalilty and LOS
Garrel 2003 Crit Care Med
Canadian clinical practice guidelines suggest enteral glutamine should be considered in trauma and burns patients
When Parenteral nutrition prescribed to critical care patients glutamine supplementation “should be considered”
AVOID in patients with SHOCK and MOF - REDOXS
NEJM – April 2013
1223 patients – ventilated with 2+ organ failure
40 ICU’s: US, Canada and Europe
4 way randomisation
Glutamine give IV and oral
Dipeptiven 0.35 g/kg / day IV
42.5 g alanyl-glutamine / glycine-glutamine dipeptides enteral
IV selenium 500mcg
Selenium 300mcg enterally
Zinc - 20mg
Beta Carotene - 10mg
Vitamin E - 500mg
Vitamin C -1500mg
Trend towards increased mortality at 28 days in patients receiving glutamine
32.4% v 27.2% (p = 0.05)
No significant difference attributed to antioxidants
30.8% v 28.8% (p = 0.48)
In hospital mortality
6 month mortality
Median time to discharge alive
ALL SIGNIFICANTLY HIGHER WITH GLUTAMINE
No significant effect on secondary outcomes with antioxidants
Big study population
Relevant to our practice
High dose of glutamine
Low glutamine levels not consistently found in their patients
Funding – Fresenius / Biosyn
P = 0.044
Many patients excluded
Not all prescribed supplements given
Cocktail of antioxidants
Canadian clinical practice guidelines (2013) - Arginine
4 level 1 studies, 22 level 2 studies
No clear evidence of benefit (Mortality / infection)
3 studies showing possible harm (Bower / Ross / Bertolini)
NOT RECOMMENDED FOR CRITICAL CARE PATIENTS
Important precursor to glutathione peroxidase
Important plasma antioxidant
RDA 40 – 80 mcg/day
Selenium levels inversely proportional to APACHE 2
Angstwerm 1999 – replacing selenium increases glutathione
Number of studies
Cocktail of antioxidants – never alone
SIGNET study probably best study
502 ICU / HDU patients with GI failure needing PN
No clear evidence of benefit
Significant reduction in infections in selenium group who received PN for > 5 days
Recent Trials in nutrition Phil Mcglone ST5 ICM/Anesthetics
What does the recent literature tell us about how much and when to start nutrition in critical care?
Initial trophic versus Full enteral feeding 6 days
Trophic feeding – increase VFD
<48hrs of ALI onset
6hrs to extubation, death or 6 days
Protocol 25ml/hr to target 25-30Kcal/kg/day
90% achieved this
Protocol 10mls/hr (20kcal/hr)
VFDs to 28 days
Secondary end points
60 day mortality
Daily % of goal feeding
Organ failure free days
No significance difference
14.9 VFDs vs 15
Except GI intolerance
Regurg .4 vs .7 %
Vomiting 1.7 vs 2.2%
Elevated GRVs 2.2% vs 4.9% (>400mls
Modest differences in calorie provision for well-nourished patients during the first week of ALI/ARDS does not appear to affect patient outcome in the ICU.
Reduced-calorie feedings may reduce perceived GI intolerance and decrease administration of prokinetic and anti-diarrheal medications.
What doesn’t it tell us
BMI 30, these patients were well nurished
AGE 50 these pts were young
Severe malnutrition were excluded
½ extubated within 6/7 so quite early!
GI difference no clinical ramifications in the study….
Enteral nutrition fewer complications
Miss Targets however
? Combining Parenteral and Enteral
Liver dysfunction, infection and death
controversy regarding PN
underfeeding with EN alone for up to 7-10 days (American guidelines)21
supplemental PN (European) within 24-48 hours in patients who are expected to be intolerant to EN within 72 hours of admission.
Canadians conclude there are insufficient therefore maximize the benefits of EN (small bowel feeding tubes and motility agents) are used prior to starting PN.
Proponents of the use of early supplemental PN have focused on data demonstrating that the cumulative energy deficit or caloric debt is associated with adverse clinical outcomes in critically ill patients.24
Opponents cite the literature demonstrating increased adverse events in patients who receive PN during their ICU stay.
Data from existing randomized trials are inconclusive
PN to prevent caloric deficit
Supplement EN early in disease
Lead to reduced complications
Withholding PN for 1/52
MC 7 ICU’s
2328 patients delayed PN until day 8
2312 patients received PN within 48hrs
Admission to a participating ICU, a nutritional risk screening (NRS) score of 3 or more (on a scale of 1 to 7, with a score ≥3 indicating that the patient was nutritionally at risk) and did not meet any of the exclusion criteria.
The primary end points
ICU days (for survivors and nonsurvivors)
time to discharge from the ICU.
new infections, infection site, duration of antibiotic therapy, inflammation (C-reactive protein), time to vent wean, need for tracheostomy, acute kidney injury, need for and duration of pharmacologic or mechanical hemodynamic support, liver dysfunction, duration of the hospital stay and time to discharge from the hospital, functional status according to the distance walked in 6 minutes and the proportion of patients who were independent in all activities of daily living, and the total incremental health care costs from randomization to hospital discharge!!!!!
The early PN group
D20 at 45 mL/hr on the day of admission
day 2 the difference between calculated goals and the amount of EN was provided as PN.
When EN provided at least 80% of nutrition needs PN was held.
The late PN group
D5 to meet whatever hydration was not provided by EN
only received PN if enteral feedings were not providing at least 80% of calculated needs by day 8.
corrected ideal body weight
with 24 kcals/kg for females > 60 years
30 kcals/kg for females < 60 years
30 kcals/kg for males > 60 years
36 kcals/kg for males < 60 years.
The primary outcome
median stay in the ICU was 1 day shorter in the late-initiation group than in the early-initiation group.
There was a statistically significant increase in the likelihood of earlier discharge alive from the ICU (hazard ratio, 1.06; 95% confidence interval [CI], 1.00 to 1.13; P=0.04).
There were no significant differences in ICU, hospital or 90-day mortality between the groups.
The median duration of hospitalization was 2 days shorter in the late-initiation group
There were significantly fewer patients that developed new infections in the late-initiation initiation group,
Duration of mechanical ventilation and the course of renal-replacement therapy were significantly shorter in the late-initiation group.
“Early initiation of PN to supplement insufficient EN during the first week after ICU admission in severely ill patients at risk for malnutrition appears to be inferior to the strategy of withholding PN until day 8 while providing vitamins, trace elements, and minerals. Late parenteral PN was associated with fewer infections, enhanced recovery, and lower health care costs.”
How Do These Results Apply?
Can these result be generalized to all Critical care
early PN group received a large parenteral glucose load (1200 kcal) over the first 48 hours
Van den Berghe study.10 This concept of tight glucose control has subsequently been shown to be ineffective and potentially harmful.
How Do These Results Apply?
ninety percent surgery patients (mostly cardiac),
(58.5%) appeared to be admitted electively.
70% of subjects averaging only a 3-4 day length of stay.
Only moderately severely ill, with an 8% ICU mortality (and 11% hospital mortality).
Almost 75% of study patients had a normal or slightly high BMI between 20 and 30.
Most practitioners would not consider there to be a role for early PN in low mortality risk patients with short ICU stays and a normal BMI
Finally, it is hard to attribute the adverse events seen in this study to early PN, when the majority of study patients received very little exposure to early PN.
(58%) of the patients in the early PN group were exposed only to 1 to 2 days of PN.
Only 25 % late PN patients ever received PN.
It is plausible that the increase in adverse events seen in this study in the early PN group were due to the delivery of a large glucose load in the first 48 hours in the ICU. This may be related to increased insulin resistance in the early phase of acute illness.
While early PN in low risk patients is clearly harmful, it is not clear whether supplemental PN added to insufficient EN early in the course of high risk patients would also be harmful
EPaNIC results targeted wide spectrum of patients
Systematic reviews show benefits PN when EN Contraindicated mortality and infection however these were based on Small Trials
Uncertainty surrounding infection implications
This is reflected in the guidelines Reflected in guidelines within 24-48hrs (European) vs 7-10days (US)
RCT, single blinded
Assess effects of PN within 24hrs of ICU admission
With short term relative contraindications to enteral nutrition.
Within 24hrs admission
Expected to stay remain on ITU calendar day after enrolment
Considered to be ineligible for EN as decided by attending
Were not expected to get EN day of or after enrolment
Not expected to survive 24hours
Known long term contraindication to EN
Height < 140cm
Malnutrition as primary reason for admission
Received PN on day 1 and reached goal calories by day 3
Reevaluated day 3 for EN
60 day mortality
Quality of life and physical function measures
Tertiary end points
Fat loss, muscle loss etc
No difference in 60 day mortality
Statistically difference in quality outcome measures but not enough to meet the pre established definition that would be clinically meaningful
No difference infection rate
1.07 days fewer ventilation early PN
0.43 fewer coagulation failure days early PN
Less Fat and muscle wasting early PN
Early PN reduced mechanical ventilation days
Did not shorten hospital stay of ICU stay
No harm in early PN
Subjective opinion that patient could not have EN
Bias as investigators knew which group ? Earlier extubation
25% PN <48hrs in >1/3 standard care got PN
? Too similar to detect difference in infection rate
?? Measures of Fat and Muscle loss, skin fold and upper arm measures shown to be poor
I would have liked to have seen europe vs US debate answered.
Allowing larger tx differences
More likely to see outcome differences
Indeed subgroup analysis of 40% standard grp whom remained unfed maybe useful
EN – GI intolerance
PN – Infectious problems ? Reducing
Formulations and central access improvements
The primary objectives:
To estimate the effect of early (defined as within 36 hrs of the time/date of original admission to the ICU) PN compared with early EN on mortality at 30 days.
To estimate the incremental cost effectiveness of early PN compared with early EN at one year
Secondary objectives: to compare the following:
Duration of specific & overall organ support in the ICU between PN & EN
Infectious & non-infectious complications in the ICU between PN & EN
Duration of ICU & acute hospital length of stay between PN & EN
Mortality at discharge from the ICU & from hospital between PN & EN
Mortality at 90 days & at one year between PN & EN
Nutritional & health-related quality of life at 90 days & at one year between EN & PN
Resource use & costs at 90 days & at one year between PN & EN
Estimated lifetime incremental cost-effectiveness between PN & EN
Patients who either on, or soon after admission within 36 hours that are:
Adult (18 years or over)
An unplanned admission (including planned admissions becoming unplanned e.g. unexpected postoperative complications)
Expected to receive artificial nutrition for two or more days in the ICU
Not planned to be discharged within three days from the ICU
Results to follow !!!
1. Microbiology Quiz (and answers!) - download here
2. Clinical Implications of antibiotic pharmacokinetic principles in the critically ill (NEJM 2013) - critique by Dr Emma Fitzgerald - download here
3. Summary of lectures
Author: Dr Ben Harris
Fungal infections in the ICU – Dr Chesterfield
- Very few places have a specific fungal infection (ITU) policy – national survey, Chalmers et al, 2011.
- A few units screen for candida on admission
- 10% colonised on admission to hospital
- 80% are colonised by the end of their ITU stay
- Of that 80% in ITU, 5-30% develop invasive candida – blood/peritoneum etc.
- Colonisation is a risk factor for invasive disease so in PHT they try and identify & type & find out sensitivities for all candida positive cultures so if it becomes a problem later on they are ahead of the game.
- Diagnosing invasive candida is not easy
- Blood cultures only have a 50% chance of being positive in a known case of candidaemia.
- Slow growing 2-3 days
- There are some other PCR and beta D glutan tests but they have to go off to a reference lab and therefore this limits their clinical use
Clinical predictors of invasive candida infection are
Increasing numbers of positive cultures over time in an increasing number of sites (e.g. NBL, then wound swab, then urine)
Candida present in more than 2 sites
Colonisation index: Number of distant sites colonised:total number of body sites cultured. If >0.5 suggests high risk of invasive candida
Other risk factors for invasive candida:
- Multifocal colonisation o TPN
- Severe sepsis
- ITU stay >7 days
Empirical antifungal therapy
- Very variable the approach to this. Depends a lot on the individual microbiologist.
- Virtually all agree candida on an NBL or BAL or ET aspirate is not significant. Candida pneumonia is very rare.
- Threshold for empirical antifungals falls with multiple sites of colonisation, still spiking temperatures, or if they have liver cirrhosis (higher risk).
- Who benefits most from empirical antifungal treatment?
- Those who have risk factors (liver cirrhosis, GI perforation), have multiple colonisation sites, who are immunosuppressed, who continue to spike fevers despite antibiotics etc.
What is the empirical antifungal of choice in the ICU?
caspofungin and then change to fluconazole when sensitivities come back. Remember that lots of people are on prophylactic fluconazole in the community so no point giving them the same agent as treatment.
Up to 40% mortality with invasive candida, worse if a non-albicans species.
Infectious disease society of America is the ‘gold standard’ guidelines for invasive candida.
Use caspofungin for invasive candidia and switch to fluconazole if sensitivities allow.
Need a two week course (clock starts from time of last negative culture). Things to look out for in invasive candidia infections
Need to do retinal examinations to rule out endophthalmitis (15% risk of this, treated with surgery or intrathecal amphotericin)
Echo to exclude seeding to the heart.
Lines are often the focus of candida, remove for 48 hours after a positive culture if possible.
Ideally try to be ‘plastic free’ or ‘plastic minimal’ for a period of time after diagnosis of invasive candida.
Remember many antifungals can be given orally so might not need a line (less likely in ITU)
Common ITU scenarios
Candida on NBL/BAL/ET aspirate has a VERY poor predictive value for candida pneumonia.
This is different if you have candida in NBL, urine and elsewhere. This represents an increasing risk of invasive disease as described above.
Candida in the urine
Don’t treat unless high risk of dissemination such as neutropenia, sepsis, undergoing urological intervention.
If treating you should get urological imaging to exclude fungal balls in ureters. o Antifungals in those groups not at risk of disseminated infection make little difference, 75% clear candida on their own with no treatment. Don’t forget to remove the catheter!
Single positive culture + cirrhosis + not getting better
- Start treatment with antifungals.
- Stop if subsequent cultures negative? No as only 50% ever are positive.
- Better to continue for 14 days and then review.
- Remember swabs are hard to interpret due to colonisation so if feasible try to send tissue samples
Resistance patterns: Dr Wyllie
- Main ITU infections are pneumonia, urine and surgical wound infections
- Catheter related bloodstream infections are getting really rare!
- Ecoli and pseudomonas most common in ITU
- It is increasingly common for community acquired pathogens to be resistant to common antibiotics, a relatively new phenomenon in the last few years.
- ‘Replacement pathogens’ common in the ITU such as candida.
- It is more critical than ever to get specimens because of all the multi-resistant bugs in the
- 100% of NBL’s in 2012 from ITU grew something.
- Co-amoxiclav resistance rates in coliforms, most common NBL isolate, now 30-40%
- The big worry is the EXPLOSION of Tazocin use for HAP.
- Use of Tazocin has gone up 200% in the last 4 years in PHT
- Use of meropenem has gone up 100% in the last 4 years at PHT
- Ciprofloxacin resistance is very low but very good to give you CDIFF and MRSA!
- Tazocin usually has good pseudomonal cover
- Rotation of antibiotics over time throughout the region is a good idea to reduce resistance
but there are not enough antibiotics out there to do this!
- Gentamicin resistance is low in PHT so far but a big problem in some London hospitals.
Most wound swabs will grow something but is it important?
A new beta lactaminase has been found that can inactivate Tazocin.
MRSA is now very rare in PHT, not in USA though.
- Meropenem resistant pseudomonas is increasing in prevalence, especially in southern Europe.
- In Europe, southern Europe is really bad for multi-drug resistant bugs. Italy seems to be especially bad.
- Need to remember that any exposure to healthcare systems in Southern Europe is a really big risk factor for the patient having a multi-drug resistant bug. Remember it’s not just holidays but also medical tourism – for cosmetic and other surgery.
The problems are not just due to antibiotic overuse. It is the whole package
- Hand washing
- Use of antibiotics in animals
- Seeing as MRSA has plummeted after a focus on hand washing etc. practice before must have been terrible!
- With these nasty bugs the aim is to Identify & Isolate ASAP
- Faecal transplantation: Five done in Portsmouth due to CDiff diarrhoea. Close family members screened or there is a pool of screened lab staff who can donate. NJ tube. Well tolerated. 80% success rate for difficult to eradicate CDIFF in PHT. Some patients are so fed up of diarrhoea they have asked for faecal transplantation.
Q&A session: Dr Wyllie & Dr Adeniji
What can ITU do better? Nothing really, no inappropriate antibiotic prescriptions in PHT ITU.
Next pandemic of flu, are we ready? Yes, after SARS the communication and surveillance mechanisms are much better now. There is the technology and communication now for a quick response and quick vaccine production so yes, we probably are ready.
CSF specimens: Ideally get CSF in meningitis BUT not always straight away if worried about ICP. PCR can be done 48 hours after antibiotics. CT scan ok but ?raised ICP? This is a difficult one because without fundoscopy (which unless you are doing it regularly) is not that helpful, and papilloedema is a late sign) then you only really have the CT and clinical examination to go on. Beware the time lag between the CT report and the LP – raised ICP might have developed. You have to balance the risk of finding out what the bug is vs doing the LP and coning. Balance of risk. Now that we have molecular tests you don’t have to rush in to get a CSF sample necessarily.
Do aprons make a difference? As part of the whole package (hand washing etc.) yes they do.
Line sepsis: PICC lines have less incidence of infection for several reasons. They are further from the mouth and all its associated bugs, they are often put into ‘less sick’ patients. They are often less exposed to bacteria as they commonly are used in patients at home rather than in hospital. Always wait for the chlorhex in alcohol to dry when putting in any line.
Suspected line sepsis – issues.
No evidence to remove lines at 7 days BUT there are severe financial penalties attached for infections.
Arterial lines – have a much higher threshold to remove as they are difficult to put in, are painful to put in and are associated with blood coming out rather than stuff going in i.e.cvc’s.
Although MRSA bacteraemias are rare, MSSA, bacteraemias are still occurring. This is a really significant infection with significant morbidity attached.
- Remove the line if worried and try to get paired line and peripheral cultures.
- Selective gut de-contamination in the ITU
- We already do this a bit, chlorhexidine mouthwash!
- The trend of all the evidence is that it probably helps but the worries about resistance will only really be answered with trials going on for 10 years or when its use becomes
- The antibiotic to use will depend on the local flora and patterns of resistance.
- Abdominal sepsis
- Remember gentamicin and metronidazole is for SURGICAL PROPHYLAXIS only
- If they have abdominal sepsis you should use;
- Amoxicillin + gentamicin (single dose) + metronidazole o Or tazocin + gentamicin
- If using Tazocin you don’t need metronidazole.
Should be 5mg/kg, maybe even 7mg/kg as that’s what the original nomogram was based on.
Date: 22nd October 2013
Venue: Queen Alexandra Hospital, Portsmouth
Facilitators: Dr Emma Fitzgerald & Dr Sara Blakeley
Author of summary: Dr Emma Fitzgerald
1. Introduction - Emma Fitzgerald
- Summary of the reasons why we use scoring systems in ICU. They are largely most useful in the context of research and to a limited point in audit.
- Explanation of the way in which the scoring systems are constructed (i.e validation and discrimination)
- Overview of the classification and common ones
- Discussion about the limits of the different scoring systems
2. SOFA Score - Ben Harris
Summary and demonstration of the score – a sequential scoring system
Simple measurements of organ dysfunction
Ability to regular scoring to monitor and plot a trajectory
Able to be used by anyone
Easy to do
Not so good as predicting mortality as APACHE II
Which values to use in the score input data at which time is tricky.
3. APACHE II Score - Ruth Thomas
Worlds most widely used severity of illness score.
Summary of score – Acute physiology Score + Age points + Chronic Health points
APACHE III -1991 & 1997
Added in haematological malignancies
Stats package under strict licensing and so not widely used
Could be used for prediction of length of stay in ICU.
APACHE IV – 2002/3
Can be used to look at ICU length of stay and efficiency of units – best predictive accuracy
APACHE systems slightly superior to SAPS and SOFA for prediction of mortality
COMBINING SOFA and APACHE II best when combined – i.e. complement rather than compete with each other
Cons – needs to be continually updated.
CONCLUSION – Not that useful! Combination is better than 1 alone
4. TARN - James Keegan
Overview of the TRISS score and how to calculate it. Used up until 2004
- Out of date
- Lots of variables not recorded and so couldn’t be calculated
- Transferred patients and intubated patients were excluded – v skewed
More complicated score validated from more recent data.
Removed physiological variables from the equation
Compared the estimated probability to actual survival to give individual hospital data
It is the best we have got
Acts as a driver for improvement – people are starting to measure themselves against it
Open to public interpretation
Key performance indicators – no evidence base for these
Consultant trauma team leader
Time to CT
Airway management GCS<9
Useful measures of performance and can help drive improvements in
Also, it is useful to use the scores to measure trends over time.
The interpretation of the data from Southampton e.g time to intubation has been improved since starting to collect the data
The time constraints enforced – can be detrimental and also difficult to make a clinical decision with regards to response to treatment in a short space of time
5. Quality Measures - Neil Richardson
Defining quality – Quality and safety are inextricably linked in healthcare
Quality indicators are different to minimum standards
They can be categorized into STRUCTURE, PROCESS, OUTCOME
Deciding on which ones to use
They need to be 1) Relevant & 2) Important to clinician 3)Measurable 4) Evidence based
Who decides which ones to use In the UK?
Critical care networks, ICS,
ICS Indicators - 2009 (through a questionnaire)
Low response rate. Used Likert 5-point scale
They used these:
1. Availability or presence of ICU doctor 24/7
2. Nurse: patient ratio
3. Number on non clinical transfers
4. Hand hygiene compliance
5. Regular review of unit morbidity and mortality
6. Unitacquired bacteraemias
7. Unitacquired MRSA infection
8. Catheter related blood stream infections,
9. Unit acquired c. difficile or MRSA
10. End of life care pathway
11. Standardised Mortality Ratio (SMR)
12. Patient with infections appropriatelyisolated
13. Instigation of early appropriate enteral nutrition
14. Days of 100% occupation of the unit
15. Operational Daily Rounds Sheet
16. MDT ward rounds take place
17. Structured handover in place
18. Readmissions within 48 hours
19. Proportion of discharges between 2201 and 0659
20. Quality improvement programme in place.
Additional ones from ESICM – expert discussion panel:
1. ICU fulfils national requirements to provide Intensive Care.
2. 24h availability of a consultant level Intensivist
3. Adverse event reporting system
4. Presence of routine multidisciplinary clinical ward rounds
5. Standardised Handover procedure for discharging patients
6. Reporting and analysis of SMR
7. ICU readmission rate within 48h of ICU discharge.
8. The rate of central venous catheter related blood stream infection.
9. The rate of unplanned endotracheal extubations.
Debate about the usefulness of the indicators on the list and whether it is the right way to measure quality or not.
Some may be political (e.g. nurse : patient ratio)
Some can be turned into standards (e.g MRSA)
Also have to consider what you do with the data once you have collected it.
.....Why do you want it ???.....Who is going to use it???