Beyond the basics
Adult diabetic ketoacidosis: Diagnosis,
management and the importance of prevention
Lesley S Mills, Jane E Stamper
Citation: Mills LS, Stamper JE
(2014) Adult diabetic ketoacidosis:
Diagnosis, management and the
importance of prevention. Journal
of Diabetes Nursing 18: 8–12
Article points
1. Diabetic ketoacidosis (DKA) is
a life-threatening complication
of type 1 diabetes.
2. DKA can progress rapidly and
requires immediate medical
attention. Readmission to
hospital is common.
3. DKA is largely preventable with
good self-management. People
with diabetes require solid
education to help them prevent
occurrence and recurrence.
Key words
- Diabetic ketoacidosis
- DSN role
- Illness management
- Prevention
Diabetic ketoacidosis (DKA) is a life-threatening complication of type 1 diabetes that
progresses rapidly and requires immediate medical attention. This article discusses the
prevalence of DKA and the implications, including repeated episodes of DKA and longer
stays in hospital. It covers the diagnosis and management of the condition and also
emphasises the importance of preventing its occurrence and recurrence by educating
people with type 1 diabetes about self-management and recognition of the first signs of
illness as soon as they have their initial diabetes diagnosis. The role of the DSN within
the wider clinical team is discussed and suggestions are made for measures that can
be put in place to aid education about self-management and prevention of this often
avoidable complication.
D
iabetic ketoacidosis (DK A) is a
life-threatening
complication
of
type 1 diabetes. It is the most
common cause of mortality in people under
the age of 40 with type 1 diabetes (Wilson,
2012). It is characterised by persistently high
blood glucose levels and it occurs when there
is not enough insulin for the body to function
normally. The body reacts by breaking down
body tissues to be used for energy as an
alternative to glucose. The acidic ketones that
build up as a result become poisonous.
Incidence
Authors
Lesley S Mills is Senior Diabetes
Nurse Specialist; Jane E Stamper
is Diabetes Nurse Specialist,
Warrington and Halton Hospitals
NHS Foundation Trust.
8
The annual incidence of admissions for people
with DK A is high. Between April 2010 and
March 2011, 8472 people who were included
in the national diabetes audit were admitted
to hospital for DK A at least once (Health and
Social Care Information Centre, 2012). It has
been found that people who have been admitted
with DK A are 2.764 times more likely to die in
the following 21 months than other people with
diabetes (Health and Social Care Information
Centre, 2012). DK A can progress rapidly and
requires immediate medical attention.
It is thought that some diabetes-related
admission events could be undocumented due
to poor discharge coding. Price et al (2013)
showed that as many as one in three hospital
admissions involving people with diabetes were
not coded as such in hospital episode statistics.
It is, therefore, difficult to establish the actual
rate of DK A in the UK.
Readmission rates for DK A are also high,
with statistics showing that an average of 31%
of people are readmitted with DK A within a
year of their initial admission (Joint British
Diabetes Societies [JBDS] Inpatient Care
Group, 2010).
The 2012 national inpatient audit showed
that the prevalence of one or more hospital
admission for DK A was 3.32% for people
with type 1 diabetes (Health and Social
Care Information Centre, 2013) and that for
all inpatients admitted specifically for the
Journal of Diabetes Nursing Volume 18 No 1 2014
Adult diabetic ketoacidosis: Diagnosis, management and the importance of prevention
management of diabetes, 13.6% were for DK A
(Health and Social Care Information Centre,
2013). This audit also highlighted that there
were longer bed stays for diabetes emergencies
compared with planned admissions.
DK A is possible to prevent. Laffel et al (2005)
reported that an estimated 50% of all hospital
admissions with DK A could be prevented with
improved outpatient treatment and better
self-care. The guidance from JBDS stresses the
importance of prompt diagnosis and intensive
management.
Diagnosis
DK A is characterised by insulin deficiency and
increasing blood glucose production in the liver.
Enhanced fat breakdown then increases levels
of serum-free fatty acids, which are metabolised
producing large quantities of ketones and
metabolic acidosis (Savage and Hilton, 2010). It
can present in someone with a new diagnosis or
indeed be a predisposing illness in someone with
an existing diagnosis of type 1 diabetes; DK A is
rare in people with type 2 diabetes.
DK A usually occurs as a consequence
of absolute or relative insulin deficiency
that is accompanied by an increase in
counter-regulatory hormones, such as glucagon,
cortisol, growth hormone and catecholamines.
A person with DK A may typically present with
symptoms of dehydration, nausea and vomiting,
hyperglycaemia and raised ketones. There
may also be pyrexia or drowsiness. Medical
conditions that may cause DK A are shown in
Box 1. The clinical features that are key to early
detection are shown in Box 2. These are the
baseline criteria for diagnosis of DK A.
It is important to note that certain groups of
people are at greater risk of developing DK A,
such as those with eating disorders and/or
mental health issues. DK A is also more common
in young people (Saunders, 2013)
The survival of people with DK A can
depend on the ability of the individual and
the professional to recognise its signs and
symptoms.
Management and care
Care Group guidance for the management of
DK A, care is not always optimal and, as Savage
and Hilton (2010) documented:
“Errors in its management are common and
associated with significant morbidity and
mortality.”
Even when local hospital guidelines are
available, the adherence to and the use of these
can vary among the admitting team. The
guidance clearly states that there is substantial
evidence to support care models that aim to
reduce the incidence of hospital admissions,
excess length of stay and acute metabolic
complications. The authors of the guidance also
suggest that these models have been “low cost
and value for money”. The JBDS state that
Page points
1. DKA is characterised by insulin
deficiency and increasing
blood glucose production
in the liver. Enhanced fat
breakdown then increases
levels of serum-free fatty
acids, which are metabolised
producing large quantities of
ketones and metabolic acidosis.
2. A person with DKA may
typically present with symptoms
of dehydration, nausea and
vomiting, hyperglycaemia and
raised ketones. There may also
be pyrexia or drowsiness.
3. Certain groups of people are
at greater risk of developing
DKA, such as those with eating
disorders and/or mental health
issues. DKA is also more
common in young people.
“The specialist diabetes team should
always be involved as soon as possible and
ideally within 24 hours because this has been
demonstrated to be associated with a better
patient experience and reduced length of stay.”
The JBDS guidance also encourages audit
against defined standards.
Box 1. Illnesses that may cause diabetic
ketoacidosis.
l The common cold/virus
l Influenza or bacterial infections
l Stomach upset/gastroenteritis
l Urinary infection
l Chest infection
l Abscesses
l Injury
Box 2. Clinical features for diagnosis of
diabetic ketoacidosis.
l Ketonaemia (3 mmol/L and over), or significant
ketonuria (more than 2+ on standard urine sticks).
l Blood glucose over 11 mmol/L or known diabetes
mellitus.
l Bicarbonate below 15 mmol/L and/or venous pH
less than 7.3.
Despite the publication of the JBDS Inpatient
Journal of Diabetes Nursing Volume 18 No 1 2014
9
Adult diabetic ketoacidosis: Diagnosis, management and the importance of prevention
Page points
1. Any individual who becomes
unwell should be advised
to seek prompt medical
treatment. The general rule
is that any child or pregnant
woman, or any person who
is unable to keep fluids
down, should be admitted
to hospital as a priority.
2. Blood glucose and ketone
monitoring should be carried
out more frequently; this
may require testing glucose
levels pre- and post-meals,
and ketone levels if glucose
levels are above 13 mmol/L.
3. Prevention of DKA relies on
the individual understanding
the physiology and treatment
of “red flag” symptoms.
Commonly termed as “sick day
rules” or illness management,
this is a set of guidance and
instructions fundamental to
the education of any person
with type 1 diabetes.
Any individual who becomes unwell should
be advised to seek prompt medical treatment.
The general rule is that any child or pregnant
woman, or any person who is unable to keep
f luids down, should be admitted to hospital
as a priority (James, 2013). If they are unable
to eat normally, carbohydrates should be
replaced with soups or liquid carbohydrates.
Withholding carbohydrates due to high glucose
levels may worsen blood ketone levels. Plenty
of sugar-free liquids should be encouraged and,
if the person is vomiting and unable to tolerate
liquid carbohydrates, medical attention should
be sought immediately. As a rough guide, the
person should try and take 2–3 servings of
carbohydrates approximately 4–5 times a day.
They should also be encouraged to drink at
least 2.5–3.5L of sugar-free f luid in 24 hours
in order to avoid dehydration (TREND-UK,
2013).
Insulin should continue to be taken even if
the individual is not able to eat normal amounts
of food. The dose may even need to be increased
during the episode of DK A.
Blood glucose and ketone monitoring should
be carried out more frequently; this may require
testing glucose levels pre- and post-meals
and ketone levels if glucose levels are above
13 mmol/L.
Caring for people after an episode of
DKA
Once the cause of the DK A episode is
identified, it is important to consider if
this illness could have been managed in a
different way. This could be discussed with the
individual in an open and non-judgemental
way. It may have been many years since the
person has seen a member of the diabetes
team and they may have forgotten what they
learnt then, hence the need to re-enforce this
education at each review with a healthcare
professional.
The specialist team need to establish if the
person who has repeated admissions with DK A
has any underlying issues. It is well documented
that at least one-third of people with DK A
has additional health needs, such as eating
disorders, or they may have compliance issues
10
and social, domestic or psychiatric problems
(Hurel et al, 1997). Where possible, the
underlying cause of DK A should be investigated
and education and support should be provided
(Jerreat, 2010). NICE (2011) states clearly that
there should be local arrangements to ensure
that people admitted to hospital with DK A
receive educational and psychological support
prior to discharge and are followed up by a
specialist diabetes team.
Preventing DKA
Prevention of complications and empowerment
of the individual with diabetes remains the
cornerstone of any self-management plan.
Prevention of DK A relies on the individual
understanding the physiology and treatment
of “red f lag” symptoms. Commonly termed as
“sick day rules” or illness management, this is
a set of guidance and instructions fundamental
to the education of any person with type 1
diabetes.
This education should begin at the initial
diagnosis. When a person is diagnosed
with diabetes, consistency and agreement
by the specialist team is key to providing a
solid knowledge base. As the importance of
sound education and advice can never be
underestimated, the diabetes team should
evaluate the structure followed in any new
person’s education, with particular regard to
illness management. At the same time, regular
review should be undertaken regarding the
adherence to the locally agreed DK A guidelines
used within the hospital.
Education about self-managing diabetes in
order to prevent DK A is essential to reduce
the risk of developing this acute illness. Good
self-monitoring and regular insulin doses
according to need are the primary preventive
measures for the condition.
With the availability of blood ketone meters,
there is now compelling evidence to support
the use of this technology for diagnosis and
management of DK A (Klocker et al, 2013).
Frequent repeated measurement of blood ketone
levels is also a practical option for people to use
to assist with early detection of rising ketone
levels and developing DK A. Evidence seems to
Journal of Diabetes Nursing Volume 18 No 1 2014
Adult diabetic ketoacidosis: Diagnosis, management and the importance of prevention
point towards insulin management behaviour
as the most common causal factor. A study
by Morris et al (1997) involved an objective
assessment of insulin management behaviour
and indicated that 28% of young adults (15–25
year olds) with type 1 diabetes did not collect
sufficient amounts of prescribed insulin to
follow their treatment regimens. This behaviour
also predicted admission for DK A.
Open discussions about the causation and
associated problems is of paramount importance
in the prevention of recurrent DK A and should
be high on the healthcare professional’s agenda.
Steps that can be easily incorporated into
routine care can prevent the emergence of DK A
and people in the diabetes team must learn to
identify psychopathologies as soon as possible
(Skinner, 2002).
Illness management should be discussed at
diagnosis and then at least annually, and there
should be the opportunity to discuss, advise and
assess the individual’s understanding of how
to prevent the risks of developing DK A. Those
younger people who are at a higher risk of DK A
should be carefully monitored, particularly if
they have had a previous admission with DK A,
are known to have an eating disorder or have
been treated for depression.
All healthcare professionals involved in
diabetes management should consider the
following measures to prevent and manage
DK A:
l Review of education, including a post-DK A
assessment.
l Maintenance of skills and knowledge in the
professional team.
l Standard agreement of all information and
resources given to the person with DK A.
l Regular audit of care and adherence to agreed
protocols.
Heller et al (2012) suggest that the increased
mortality among those aged 15–30 years
with diabetes – which was nine times higher
in young men with diabetes than without
diabetes – is alarming and ref lects ineffective
self-management among younger people
with diabetes. Therefore, it is important that
healthcare professionals are able to deliver
complex interventions to ensure that these
Journal of Diabetes Nursing Volume 18 No 1 2014
vitally important messages reach younger
people. This can be done in a variety of ways:
l Structured education.
l One-to-one consultations.
l DK A review methods (pre-discharge), for
example, ensuring individuals understand
illness management and are competent
self-managing and administering insulin.
l Out-of-hours advice.
All people with type 1 diabetes should be
educated about self-management. A greater
challenge is making sure that educational
messages are understood. Saunders (2013) has
commented on how inadequate education and
the lack of understanding increases the risk for
developing DK A.
The role of the DSN
The DSN is crucial in supporting independence
and in helping people self manage their diabetes
more effectively. DSNs are in a position where
they have direct regular access to the person
with diabetes. They can apply specialist and
specific knowledge and skills to manage
physical and psychological morbidity, and
help to alleviate physical and psychological
problems inherent in a long-term condition.
They can help coordinate complex care and
refer on to other professionals as part of the
multidisciplinary team, particularly within
the community services. They can provide
people with diabetes with approachable,
knowledgeable, accessible and professional
support (Royal College of Nursing, 2010).
Adequate and appropriate skill mix is
important to the dynamics of any team. In
this instance, this will include the DSN,
diabetologist and the specialist registrar. The
JBDS Inpatient Care Group (2013) recommends
that the specialist team must always be involved
in the care of those admitted with DK A and
in the assessment of precipitating factors,
DK A management, discharge and follow up.
The role of the DSN is multifactorial. In the
TREND-UK publication An Integrated Career
and Competency Framework for Diabetes Nursing
(2011) it is suggested that experienced and
senior nurses will be expected to provide expert
advice to people with DK A and participate
Page points
1. Illness management should be
discussed at diagnosis and then
at least annually, and there
should be the opportunity to
discuss, advise and assess the
individual’s understanding
of how to prevent the risks
of developing DKA.
2. All healthcare professionals
involved in diabetes
management should carry out a
review of education, including
a post-DKA assessment. They
should also ensure maintenance
of their skills and knowledge,
and ensure consistency of all
information and resources
given to people with diabetes.
3. The DSN is crucial in
supporting independence and
in helping people self-manage
their diabetes more effectively.
They can apply specialist
and specific knowledge and
skills to manage physical and
psychological morbidity.
11
Adult diabetic ketoacidosis: Diagnosis, management and the importance of prevention
“The healthcare
professional should
ensure that they have
the ability to provide
support and education
to people at risk of
developing DKA.”
in the formulation of local guidelines and
protocols. Through clinical practice, the DSN
can demonstrate knowledge and skills to both
promote the safety and wellbeing of people with
diabetes, and acknowledge any potential gaps
in service provision. TREND-UK also advocate
active participation in peer review of one’s own
practice (2011).
Specialist teams have the evidence that robust
protocols can treat DK A successfully. The role
of the DSNs is such that they can inf luence care
and potentially prevent re-admissions. Local
incident reporting will, in part, assist in the
review of the effectiveness of national guidance.
Using skills, knowledge and dedication to the
promotion of health and wellbeing, the DSN
can be instrumental in the treatment and
prevention of DK A.
Conclusion
DK A is an acute complication of diabetes,
which can require hospital admission and
requires prompt action and treatment. The
healthcare professional should ensure that
they have the ability to provide support and
education to people at risk of developing
DK A and those that have had an episode
of DK A; it is important to re-enforce the
ongoing education to help reduce both the
initial occurrence and recurrence of this often
preventable life-threatening condition.
n
Acknowledgements
With thanks to Alex Williams, Librarian,
Knowledge and Evidence Service, Warrington and
Halton Hospitals NHS Foundation Trust
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