Nursing care
Sepsis nursing care: what to assess and what to do first
Written and reviewed by Dana Whitfield, RN, MSN · 5 min read · Updated September 2026
Short answer
Sepsis nursing care centres on early recognition and the hour-one bundle: draw blood cultures, then give broad-spectrum antibiotics within the hour, alongside fluid resuscitation and lactate measurement. The sequence matters because delayed antibiotics let infection progress to septic shock, while cultures drawn after antibiotics are started often come back falsely negative.
Recognising it at the bedside
Sepsis rarely announces itself with a single dramatic sign. Look for the combination: a source of infection, plus a change from the patient's baseline mental status, respiratory rate, or blood pressure. A patient who is more confused than an hour ago, breathing faster than 22 breaths per minute, or newly hypotensive after a urinary catheter insertion or a chest infection deserves a full set of vitals and a lactate, not a wait-and-see approach.
qSOFA and SIRS criteria give structure, but neither replaces your own pattern recognition. A single low-grade temperature or a slightly elevated heart rate means little in isolation. What should raise your index of suspicion is the trend: a patient trending down over two or three sets of observations, especially post-operatively or in someone with a known infection, chronic illness, or recent hospitalisation.
Why the classic presentation misleads
Textbook sepsis features fever, tachycardia, and hypotension. In practice, a substantial number of patients, especially older adults and those who are immunosuppressed, present with hypothermia or a normal temperature instead. An elderly patient with a urinary tract infection may show only new confusion and a slightly low blood pressure, with no fever at all.
This matters because relying on fever as a trigger for concern delays recognition in exactly the population most likely to deteriorate quickly. Treat any unexplained change in mentation, urine output, or blood pressure in a patient with a plausible infection source as a sepsis red flag until proven otherwise, particularly in the very young, the very old, and anyone on corticosteroids or immunosuppressants that blunt the febrile response.
Priority nursing actions
The sequence is fixed for a reason: draw blood cultures first, from two separate sites where possible, then start broad-spectrum antibiotics within one hour of recognition. Giving antibiotics before cultures are drawn can sterilise the sample and leave the team blind to the causative organism, which matters enormously if the patient fails to improve or the infection is resistant.
Alongside cultures and antibiotics, begin the rest of the hour-one bundle: measure serum lactate, start crystalloid fluid resuscitation for hypotension or lactate above 2 mmol/L, and apply vasopressors if mean arterial pressure stays below 65 mmHg despite fluids. Insert or check a reliable IV line early, since a delay in antibiotic administration of even one hour is associated with measurably worse outcomes. Document the time infection was suspected and the time antibiotics were actually infused; that gap is what audits and rapid response teams scrutinise.
Labs and diagnostics to expect
Expect a full septic screen: blood cultures times two, lactate, complete blood count with differential, renal and liver function, coagulation studies, and a urinalysis or chest X-ray depending on the suspected source. A rising lactate or one that fails to clear after fluid resuscitation signals ongoing tissue hypoperfusion and a worse trajectory.
Procalcitonin, where available, helps distinguish bacterial infection from other causes of inflammation and can guide de-escalation of antibiotics once cultures return. White cell count can be elevated, low, or even normal in sepsis, so a normal count does not rule sepsis out. Repeat lactate at two to four hours after the initial bundle to confirm clearance; failure to clear is a trigger for escalation, not reassurance that treatment is working.
Complications and their early signs
Septic shock is the complication to watch for constantly: persistent hypotension requiring vasopressors despite adequate fluid resuscitation, with an elevated lactate. Watch urine output closely, since a drop below 0.5 mL/kg/hr signals renal hypoperfusion and often precedes overt acute kidney injury by hours.
Disseminated intravascular coagulation can follow, so monitor for unexplained bruising, oozing from IV sites, or falling platelet counts. Acute respiratory distress syndrome is another late complication, presenting as worsening hypoxia despite oxygen therapy. Any new organ dysfunction, whether renal, respiratory, hepatic, or a falling level of consciousness, should prompt immediate reassessment and escalation rather than being attributed to the underlying infection alone.
Teaching that changes outcomes
For patients recovering from sepsis, teach them to recognise the source infection's warning signs and to seek care early if symptoms recur, since a prior sepsis episode raises the risk of a repeat admission. Emphasise completing the full course of any prescribed oral antibiotics and attending follow-up appointments to confirm the infection has cleared.
For families and at-risk groups, particularly those with indwelling catheters, chronic wounds, or recurrent urinary tract infections, teach the specific early signs relevant to their situation: new confusion, reduced urination, or feeling worse rather than better a day or two into a known infection. Encourage prompt reporting rather than waiting, since the time from symptom onset to treatment is the single factor nursing teaching can most directly influence.
The next step on this is the same as on everything else here: answer questions and read the rationales. Our med-surg practice questions are the closest set to what this page covers.
One question from the med-surg set
A client with chronic obstructive pulmonary disease has an oxygen saturation of 88% on 2 L/min via nasal cannula and is alert with no distress. What should the nurse do first?
Rationale
In COPD a saturation of 88–92% is the therapeutic target, not an emergency, and this client is alert with no distress. The first action is the independent nursing intervention that is least invasive and most likely to help: sit them up and reassess. Turning the oxygen up to 6 L/min risks blunting the hypoxic drive, and calling rapid response or drawing an ABG escalates ahead of an assessment you have not finished.
Answer: B
Common questions
What is the golden hour in sepsis care?
It refers to the target of starting broad-spectrum antibiotics within one hour of recognising sepsis, after blood cultures have been drawn. Each hour of delay is associated with increased mortality, which is why the sequence and speed are protocol-driven rather than left to individual judgement.
Can a patient have sepsis without a fever?
Yes. Older adults, infants, and immunosuppressed patients often present with a normal or low temperature despite significant infection. Rely on the overall pattern of vital sign changes and mental status rather than fever alone.
Why draw cultures before giving antibiotics?
Antibiotics can suppress or kill the causative organism before a sample is taken, leading to a falsely negative culture. This leaves the team without guidance on whether the chosen antibiotic is appropriate if the patient fails to improve.
What lactate level indicates septic shock?
A lactate above 2 mmol/L combined with persistent hypotension requiring vasopressors after adequate fluid resuscitation meets the criteria for septic shock. Lactate that fails to clear after initial treatment is a strong indicator of poor perfusion continuing.
How is sepsis tested on the NCLEX?
Expect scenario-based questions asking you to prioritise actions, most commonly whether to draw cultures or start antibiotics first, and questions on recognising subtle deterioration such as new confusion or falling urine output rather than classic fever and tachycardia.
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