Sepsis is defined as the inflammatory response toward an infection (1). It is either simple or severe sepsis depending on the organ dysfunction involved as a result of the infection and other factors (2). In terms of the pathophysiology of severe sepsis, a cascade of inflammation and activation of the coagulation system associated with impaired fibrinolysis causes changes in microvascular circulation associated with organ dysfunction, severe sepsis, multiple organ dysfunction syndrome, and death (3).
In terms of definitions of other sepsis-associated symptoms, it was generally agreed at the International Sepsis Definitions Conference which was convened in 2001 and the following definitions of sepsis syndromes were published in order to clarify the terminology used to describe the spectrum of disease that results from severe infection. Sepsis is the presence of infection in association with meeting the Systemic inflammatory response syndrome (SIRS) criteria (Box 1 (2)). The clinical significance of meeting SIRS criteria in the absence of organ dysfunction or shock is still unclear. Severe sepsis is defined as evidence of end-organ dysfunction such as altered mental status, episode of hypotension, elevated creatinine, or evidence of disseminated intravascular coagulopathy. Septic shock is defined as persistent hypotension despite adequate fluid resuscitation or tissue hypoperfusion manifested by a lactate greater than 4 mg/dL. Bacteremia is defined as the presence of viable bacteria within the liquid component of blood (1). Acute pyelonephritis is defined as an acute infection of one or both kidneys; usually, the lower urinary tract is also involved (4).
Antibiotic regimen of choice for Sepsis that is associated with urinary tract infection is Co-amoxiclav 1.2g 8 hourly intravenously together with Gentamicin IV dose of 5mg/kg once daily (5). Although that is controversial whether to use the ideal body weight (IBW) or to obtain blood samples indicating Gentamicin level to get the optimal dosing regimen for Gentamicin in obese patient due to risk of accumulation with Aminoglycoside and the fear of oto- and nephrotoxicity (6). Other supportive measures depend on the patients status; table 1 (1) contains helpful measures that indicate markers of organ dysfunction.
Case Summary
Our patient, C.M., is a 56 years old female who was admitted to the Accident and Emergency department (A&E) due to an increased urinary frequency and a high temperature of 40.5°C. Other complaints were back pain and shortness of breath (SOB). Also, the patient had reported a fall the night before admission. Moreover, the patient had vomited the night before and in the morning of admission.
C.M. is a previous smoker who had stopped smoking several years ago and she lives with a partner. She is clinically obese weighing 100kg and her height is 152.4cm. Giving this, her ideal body weight (IBW) comes to 49kg. The only known allergy for this patient is microspores tapes.
The patients past medical history (PMH) included asthma, non-insulin dependent diabetes mellitus (NIDDM) and fibromyalgia. She was on one puff daily of each Symbicort Turbohaler 200/6 µg and Ventolin Accuhaler for the management of her stage 3 asthma. Metformin 1g daily was prescribed for her diabetes control; however, its formulation was not mentioned (whether it is a sustained release tablet or a normal release one!). For her fibromyalgia, she was taking 300mg of Quinine sulphate daily together with 150mg of Amitriptyline daily (which is a very high dose; low dose of tricyclic antidepressant (T CA) is recommended i.e. 20-30mg of Amitriptyline). For her pain, the patient was on Co-codamol tablet as required (strength, dose and frequency were not mentioned). Having that she is a diabetic patient over 40 years old, a dose of Simvastatin 40mg daily was prescribed as a primary cardiovascular disease (CVD) protection measure. In addition, Omeprazole 20mg daily was one of her regular medications with unclear indication.
Investigations
On admission, an Electrocardiography (ECG) was performed and indicated sinus tachycardia; which could be related to the high temperature, pain or sepsis. The patients vital signs were abnormal having a respiratory rate (RR) of 22 breaths per minute (normal is ~ 12bpm), a heart rate (HR) of 117 beat per minute (normal is ~ 70bpm) and a blood pressure (BP) of 142/65 mmHg (target for diabetic patients is < 130/80 mmHg).
Her laboratory investigations were almost normal except for some parameters. The Sodium level was a bit low which could be a result of the frequent urination or an Amitriptyline hyponatremic effect. Glucose and C-reactive protein (CRP) levels were high which might indicate the presence of infection. Thrombocytopenia may be caused by Quinine or Simvastatin administration!
Impression and related Management Plan
The patient was diagnosed as a pyelonephritis and sepsis case; so empirical antibiotic regimen was initiated with 1g Amoxicillin intravenously six hourly and 500mg ciprofloxacin orally once daily. Also, 1g Paracetamol intravenously six hourly and one liter Normal Saline intravenously over 24hours was started.
Urinalysis on the first day indicated the presence of leucocytes, nitrites, glucose, ketones and blood which means a presence of infection. On the second day, blood culture showed a growth of E. coli which is sensitive to Gentamicin, therefore, 400mg Gentamicin intravenously every 24 hour was prescribed and ciprofloxacin was discontinued. Gentamicin plasma level was requested 6-14 hours after administration of the first dose. In addition to the patients regular medications, 50 mg of Cyclizine eight hourly and 20mg of Citalopram once daily were added, paracetamol IV was switched to orally in the second day and 30mg of oral codeine as required was prescribed ; but the patients Salbutamol Inhaler had been stopped for unclear reason.
Discussion
Revising the management plan for this patient and in comparison to the local guidelines for the management of pyelonephritis and sepsis patients, we would notice that 1.2g intravenous Co-Amoxiclav is the first-line choice of Penicillins, not Amoxicillin, together with Gentamicin. However, if the ideal body weight is required to obtain the appropriate dosing of Gentamicin for obese patients, so in this case, 245mg of Gentamicin supposed to be prescribed instead of 400mg which is the maximum daily dose (Although that some infectious diseases specialist would recommend going to the maximum dose to make sure that we get the maximum benefit; but we must consider patient status and severity of infection!). Also, it is essential to check the optimal timing for monitoring each drug plasma level, in our case, Gentamicin therapeutic drug monitoring (TDM) has not deviated from the local guidelines recommendation for the once daily dosing of Gentamicin i.e 6-14 hours after giving first dose.
Having a patient with increased urination and vomiting, we must consider fluid replacement. Replacing with one liter Normal Saline (NS) might have not met the patients requirement! So it is recommended to check patients need to ensure appropriate replacement i.e. at least 2.5-3 liter daily. We could have recommended giving 2 liter NS each over 8 hours plus the addition of 500ml 5% Dextrose to ensure calories intake if the patient cannot tolerate oral intake.
Considering the patients asthma control, we must confirm that Salbutamol inhaler was not mistakenly missed after admission. Since that SOB was one of the patients complaints, we must ensure that it was relieved, if not, consider 5mg of Salbutamol nebulizer four times daily to be added to the regimen and if nebulizer is not necessary, ask for Salbutamol inhaler to be charted as if required basis (6). Also, blood gases were not mentioned so it is probably safer to ask for the oxygen and carbon dioxide saturations to consider if oxygen therapy is needed! Confirm that the patient and nursing staff are aware of inhalers techniques.
The patient is on Amitriptyline 150mg orally daily which is considered an old practice for the treatment of fibromyalgia (high dose TCA) and the current recommendation states 20-30mg of Amitriptyline daily for 8 weeks (6) so it is better to re-consider dosing or to change regimen. Low dose Sertraline or high dose Venlafaxine therapy may be effective (6) so consider changing if no further benefit of the use of Amitriptyline. For the associated pain, Paracetamol with Tramadol has better efficacy than Co-codamol. Pregabalin (150-300mg every 12 hours) may improve pain especially if combined with Tramadol; it also improves sleep and morning stiffness (6). So, knowing the patients control with the current medication would be helpful to consider treatment change or modeling to get the most of pharmacologic treatment. Suggesting alternative ways to manage symptoms is also recommended, e.g. spa therapy, physiotherapy, stress management, acupuncture or diet (6).
NICE guidelines for the management of type II diabetes mellitus state that Metformin is the first line choice for obese patients. Choosing appropriate formulation that suits the patients lifestyle is essential to ensure patients compliance. Once daily dosing of sustained release formula could provide 24 hour control over glucose, but in this case the present of infection interfered with having accurate reading so it is logical to check the HbA1c to check the glycemic control over the last 8 weeks to consider any therapy modification. Also, pre- and post-prandial glucose level monitoring is required to avoid both hyper- and hypoglycemia using the current regimen.
Statins must be prescribed for all diabetic patients who are over 40 years old (6) and having any risk factor of Coronary Vascular Diseases (CVD). The patient was on Simvastatin 40mg daily but no Cholesterol level obtained (consider Ezetimibe if high Cholesterol). Monitoring liver function tests (LFTs) and any muscular side effect is important. Also, having a high BP on admission, checking that BP is normal after sepsis reveals is vital. If persistent high BP, consider adding ACE inhibitors, having the benefit of BP control and protecting the heart in patients susceptible to Vascular Diseases. Weight loss in this patient is advisable so consider dietitian and physiotherapist review to consider going on diet and exercise. Also, annual eye check is recommended to control retinopathy due to DM.
Cyclizine was prescribed on regular basis, so we better check if the patient is really on need of a regular anti-emetic, otherwise, consider changing it to as required basis. Regarding Paracetamol, it was prescribed on as needed basis but it was not put clear not to exceed the maximum daily dose, so it is recommended to clarify that to not give the patient more than 4g per day. It is safer to contact the patients GP to confirm the indication of Omeprazole and to consider discontinuation if no clear indication was obtained. Additionally, the patient was thrombocytopenic, which could be a side effect of administration either Quinine or Simvastatin, so monitoring the platelets count is highly recommended to prevent any complication, although DVT prophylaxis is not needed as long as the patient is mobile.
Conclusion
In conclusion, the overall patient management had no much deviation from the current guidelines recommendation except for some practice that need to be reviewed considering the current patients status. Therapeutic monitoring should be carried on because the patient is under risk of many complications or side effects. Lastly, patients awareness of her clinical condition and treatment requirement for each problem is helpful to prevent or reduce future health problems.
Appendix 1: PATIENT MEDICATION PROFILE
Patient details
Name
C.M.
Consultant
General Practitioner
Address
Gender
Female
Weight
100 kg
Height
152.4 cm
Community Pharmacist
Date of Birth (Age)
56 y.o.
Known Sensitivities
Micropores tapes
Social History
Previous smoker, lives with partner
Patient hospital stay
Presenting complaint in primary care / reason for admission
Admission date
2008
Increased urinary frequency
Back pain
Shortness of breath
Vomiting
Fall (the night before)
Fever (40.5°C)
Discharge Date Discharged to
Relevant medical history
Relevant drug history
Date
Problem Description
Date
Medication
Comments
Asthma
Symbicort 200/6 Turbohaler 1 puff daily
Ventolin Accuhaler 1 puff daily
Non-insulin dependent diabetes mellitus
Metformin 1g daily
Formulation?
Fibromyalgia
Co-codamol PRN
Strength?
Amitriptyline 150mg daily
Too high!
Quinine sulphate 300mg daily
Duration?
Simvastatin 40mg daily
1ry CVD prevention
Omeprazole 20mg daily
Indication?
Relevant non drug treatment
Prescribed Medication
Start
Stop
Clinical/Laboratory Tests
Result
1
Paracetamol 1g IV 6 hourly
Day 1
Day 2
ECG
Sinus tachycardia
2
0.9% sodium chloride 1000ml IV over 24 hours
Day 1
HR
117 bpm
3
Amoxicillin 1g IV 6 hourly
Day 1
BP
142/65
4
Ciprofloxacin 500mg PO OD
Day 1
Day 2
RR
22 bpm
5
Metformin 1g PO OD
Day 1
Urine analysis
Leucocytes, nitrites. Glucose, ketones, & blood +ve
6
Omeprazole 20mg PO OD
Day 1
Blood culture
E. coli
7
Quinine sulphate 300mg PO OD
Day 1
Na
134 (135-145)
8
Simvastatin 40mg PO OD
Day 1
CrCl
145.3 (78-120)
9
Amitriptyline 150mg PO OD
Day 1
Glucose
8.9 (3.9-5)
10
Symbicort 200/6 inhaler 1 puff daily
Day 1
CRP
180 (<10)
11
Codeine phosphate 30mg PO PRN
Day 1
Bilirubin
35 (3-16)
12
Citalopram 20mg PO OD
Day 1
PT
17 (12-15)
13
Cyclizine 50mg PO 8 hourly
Day 1
APTT
39 (20-30)
14
Gentamicin 400mg IV 24 hourly
Day 2
Platelets
70 (150-400)
15
Paracetamol 1g PO PRN
Day 2
Clinical management
Diagnosis
Pharmaceutical Need
Pyelonephritis
Evidence-based treatment
Sepsis
Treatment according to guidelines
Care Issue/Desired Output
Action
Output
Confirm drug history + reconcile drug history
Ask patient how and when she takes her medication and the indication for each medicine.
Compare with GPs DHx + Phone GP for indications for amitrip., omep. and quinine, and when they were initiated.
All regular meds have been charted except prn salbutamol.
Patient is SOB; advise Dr to chart it prn.
Confirm antibiotic regimen for pyelonephritis/sepsis in addition to TDM
Check the local guidelines that amoxicillin is first-line for the indication (culture sens. to gent.).Calc. her ideal body weight and CrCl.Calc. gent. dose based on ideal body weight and compare to 400mg iv od (max dose).Check local guidelines whether 6-14 post dose gent. level is correct procedure. Chase level.
Monitor BP, Temp, Pulse, RR for signs of resolving sepsis whilst on current regimen.
Co-amox 1.2g iv tds is first-line with gent 5mg/kg (max 400mg, ideal body wt 49kg, CrCl 71ml/min).
Recommend switch to co-amox because she needs 7/7 iv + oral.
Recommend 245mg gent iv od
Obtain level before 2nd dose is given+TDM for gent is correct. Review need for gent in 48h
Fluid requirements possibly not being met by 1L N. saline in 24hours
