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GERICLINICS

GeriQBank · Paper III · Q3

A 65-year-old diabetic with chronic kidney disease presents with altered sensorium, fever, leucocytosis and hypotension — how will you evaluate and manage?

Moderate YieldAsked ×115-mark essay
Topic
Delirium
Chapter
Delirium
Years asked
Not recorded in the source
Frequency
Set 1× in Paper III (2009–2025)

As set in the university paper

  • A 65-year-old male, a known diabetic with chronic kidney disease, is admitted to the emergency ward with altered sensorium, fever, elevated total leucocyte count and hypotension. How will you evaluate and manage this patient?

    Paper III · Infections & Immunity · asked ×1 · 15-mark essay · see in paper list

Answer framework

  1. Frame the problem — Sepsis-3 and qSOFA; septic shock; atypical presentation in older people; multifactorial delirium
  2. Likely sources in diabetes with CKD — urinary; skin and soft tissue; respiratory; vascular access; intra-abdominal and mucormycosis
  3. Non-septic contributors to exclude — uraemic and electrolyte; hypoglycaemia; HHS and euglycaemic ketoacidosis; drug accumulation; structural and other causes
  4. Evaluation — immediate bedside steps; investigations
  5. Management — the hour-1 bundle; fluids in CKD; antibiotics and the kidney; source control
  6. Continuing ward/ICU care — glycaemia; renal support; delirium (ABCDEF); sedation; drugs to stop; supportive care; goals of care
  7. Recent updates — Surviving Sepsis 2026; post-sepsis syndrome; PADIS 2025; KDIGO dosing; India

An exam answer plan drawn from the detailed answer below. Use it to attempt the question first.

Detailed answer

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Attempt it firstOutline your answer as a 15-mark essay before revealing it — definition, causes, evaluation, management and the geriatric angle.Reveal answer

Short revision answer

  • Fever + leucocytosis + hypotension + altered sensorium = sepsis or septic shock with sepsis-associated delirium — time-critical, and the confusion is itself an organ-failure sign. Sepsis-3: organ dysfunction from a dysregulated response to infection; qSOFA = altered mentation, systolic BP ≤100 mmHg, RR ≥22/min; septic shock = vasopressors for MAP ≥65 mmHg plus lactate >2 mmol/L after fluids.
  • In older people delirium or falls may be the only signs; fever may be absent, and hypothermia carries a worse prognosis. The delirium is multifactorial — infection, hypoperfusion, metabolic derangement, drug accumulation and the ICU environment.
  • Sources in diabetes with CKD: urinary tract (the commonest — pyelonephritis, emphysematous pyelonephritis, abscess, obstruction, CAUTI); diabetic foot, cellulitis, necrotising fasciitis, pressure injury; pneumonia or TB; dialysis catheter, graft or PD peritonitis; cholangitis, emphysematous cholecystitis, diverticulitis, mucormycosis.
  • Exclude in parallel: uraemia, acidosis, hyperkalaemia, sodium and calcium disorders; hypoglycaemia (sulfonylureas and insulin accumulate in CKD — a lethal miss); HHS, or euglycaemic ketoacidosis on SGLT2 inhibitors; drug toxicity (cefepime, carbapenems, morphine metabolites, gabapentinoids, aciclovir, H2 blockers, metformin lactic acidosis); stroke or bleed, dialysis disequilibrium, non-convulsive status, Wernicke's.
  • Bedside: ABC (protect the airway if GCS falls), access, glucose, monitoring, urine output, GCS and RASS, and a full skin, foot, perineal and dialysis-access examination (fundus and sinuses if mucormycosis is possible). Tests: lactate, two blood cultures before antibiotics (without delaying them), CBC, glucose, renal function, electrolytes, calcium, phosphate, magnesium, ABG and anion gap, LFTs, coagulation, CRP/procalcitonin, urine, sputum and CBNAAT, wound culture, ECG, chest X-ray, renal ultrasound; CT head, EEG or LP only for focal signs, seizures or meningism.
  • Hour-1 bundle: lactate, cultures, broad-spectrum antibiotics within the hour, fluids for hypotension or lactate ≥4, and noradrenaline first-line for MAP ≥65 (add vasopressin; hydrocortisone if refractory). In CKD, heart failure or dialysis, give smaller boluses (250–500 mL) and reassess each time rather than a fixed 30 mL/kg; use balanced crystalloids.
  • Give a full antibiotic loading dose, then adjust for renal function; avoid nephrotoxins; stop metformin, NSAIDs, ACE inhibitors/ARBs and SGLT2 inhibitors; de-escalate on cultures; achieve source control within 6–12 hours (drainage, nephrostomy or stent, debridement, line removal).
  • Ongoing care: insulin infusion to about 140–180 mg/dL and stop sulfonylureas; RRT for AEIOU (continuous if unstable); the ABCDEF bundle with CAM-ICU; avoid benzodiazepines and prefer dexmedetomidine; stop renally accumulating and deliriogenic drugs; VTE and ulcer prophylaxis, nutrition, pressure care, mobilisation; set CGA-based goals of care early — frailty predicts outcome better than age.
  • Updates: Surviving Sepsis 2026 — narrower empirical cover (no routine anti-anaerobic cover at low risk), one blood-culture set acceptable in low-resource settings, cultures before antibiotics matter most (yield falls by about a third within ~70 minutes), and post-sepsis follow-up for cognitive, physical and psychological sequelae; PADIS 2025; KDIGO dosing. India: emphysematous pyelonephritis, diabetic foot, TB and mucormycosis are common; dialysis is covered by the PM National Dialysis Programme and PM-JAY.

Condensed by GeriClinics from the detailed answer below, with no new facts added.

One-line formulation: Fever + leucocytosis + hypotension + altered sensorium = sepsis / septic shock with sepsis-associated delirium, on a background of diabetes and CKD which both predispose to infection and to metabolic and drug-induced encephalopathy. This is a time-critical emergency: the altered sensorium is itself an organ-failure marker (SOFA/qSOFA).

18 High-Yield Points

A. Frame the problem

1.

Sepsis-3: life-threatening organ dysfunction from a dysregulated host response to infection. Altered mentation is one of the three qSOFA items (altered mentation, systolic BP ≤ 100 mmHg, respiratory rate ≥ 22/min). Septic shock = vasopressor requirement to keep MAP ≥ 65 mmHg plus lactate > 2 mmol/L after adequate fluids.

2.

In older adults, delirium and falls may be the only presenting features of sepsis; fever may be blunted or absent, and hypothermia carries a worse prognosis.

3.

Delirium here is multifactorial: infection + hypoperfusion (Low O /low perfusion) + metabolic derangement + drug 2 accumulation + ICU environment — the whole left column of DELIRIUM IS VERY PAINFUL operating at once.

B. Likely sources of sepsis in a diabetic with CKD

4.

Urinary tract: acute pyelonephritis, emphysematous pyelonephritis or cystitis, perinephric abscess, obstructed infected system, catheter-associated UTI. Diabetes plus CKD makes urosepsis the single commonest source.

5.

Skin and soft tissue: diabetic foot infection, cellulitis, necrotising fasciitis, pressure injury.

6.

Respiratory: community-acquired or aspiration pneumonia, tuberculosis.

7.

Vascular access: haemodialysis catheter-related bloodstream infection, arteriovenous graft infection, peritoneal dialysis peritonitis if on PD.

8.

Intra-abdominal: cholangitis, emphysematous cholecystitis, diverticulitis, rhino-orbito-cerebral mucormycosis in poorly controlled diabetes.

C. Non-septic contributors to the altered sensorium (must be excluded in parallel)

9.

Uraemic encephalopathy, metabolic acidosis, hyperkalaemia, hyponatraemia, hypocalcaemia, hyperphosphataemia.

10.

Hypoglycaemia — CKD reduces renal insulin clearance and gluconeogenesis, so sulfonylureas and insulin accumulate; this is a classic and lethal miss.

11.

Hyperosmolar hyperglycaemic state or euglycaemic ketoacidosis if on an SGLT2 inhibitor.

12.

Drug accumulation in CKD: cefepime and carbapenem neurotoxicity, morphine metabolites, gabapentin/pregabalin, aciclovir, H2-receptor antagonists, metformin-associated lactic acidosis.

13.

Structural / other: stroke, intracerebral bleed (uraemic platelet dysfunction, anticoagulation), dialysis disequilibrium syndrome, non-convulsive status epilepticus, Wernicke's encephalopathy.

D. Evaluation

14.

Immediate bedside: ABC, airway protection if GCS is falling; large-bore access; capillary glucose; continuous SpO , BP, 2 ECG; temperature; urine output via measurement (avoid an unnecessary indwelling catheter, but it is justified in shock); GCS and RASS; full skin, foot, perineal and dialysis-access examination; fundus and sinus examination if mucormycosis is possible.

15.

Investigations: serum lactate (repeat if raised); two sets of blood cultures before antibiotics (do not delay antibiotics for them); complete blood count with differential; blood glucose (mg/dL); urea and creatinine (mg/dL) with baseline eGFR for comparison; sodium and potassium (mEq/L); calcium (mg/dL), phosphate, magnesium; arterial blood gas with anion gap; liver function tests; coagulation profile; CRP/procalcitonin; urine routine, microscopy and culture; sputum culture and CBNAAT; pus/wound culture; HbA1c; ECG; chest radiograph; ultrasound KUB for hydronephrosis, gas or abscess, with contrast-enhanced CT only when the benefit outweighs contrast risk. Add CT head, EEG or lumbar puncture only if focal signs, seizures or meningism are present.

E. Management

16.

Hour-1 sepsis bundle: measure lactate, take blood cultures, give broad-spectrum antibiotics within the first hour, begin fluid resuscitation for hypotension or lactate ≥ 4 mmol/L, and start noradrenaline as the first-line vasopressor to keep MAP ≥ 65 mmHg. Add vasopressin if noradrenaline requirement rises; consider hydrocortisone in refractory shock.

17.

Fluids in CKD need judgement, not a fixed recipe. The 30 mL/kg crystalloid figure is a starting point; in oligo-anuric CKD, established heart failure or dialysis dependence, give smaller aliquots (250–500 mL) with reassessment after each using passive leg raise, lactate clearance, capillary refill and lung ultrasound. Prefer balanced crystalloids; avoid starches; watch for hyperkalaemia with potassium-containing fluids.

18.

Antibiotics and the kidney: give a full loading dose, then adjust the maintenance dose to renal function; avoid aminoglycosides and other nephrotoxins where possible; stop metformin, NSAIDs, ACE inhibitors/ARBs and SGLT2 inhibitors during the acute illness; de-escalate on culture results. Achieve source control within 6–12 hours — drain the abscess, relieve obstruction with a nephrostomy or stent, debride the foot, or remove the infected dialysis catheter.

F. Continuing ward/ICU care

Domain Action

Glycaemia Isnuslufloinn yinlufurseioans o(pr rboalosnagl-ebdo lhuys;p toagrlgyecta eromuigah ilny C1K4D0)–180 mg/dL; hourly monitoring during infusion; stop Renal support Watch for AKI on CKD. RRT indications — Acidosis, Electrolytes (refractory hyperkalaemia), Intoxication, Overload (fluid), Uraemic complications (encephalopathy, pericarditis). Continuous modalities are preferred in haemodynamic instability Delirium care ABCDEF bundle — Assess/prevent/manage pain; Both spontaneous awakening and breathing trials; Choice of sedation; Delirium assess, prevent and manage; Early mobility; Family engagement. Screen with CAM-ICU (or 4AT on the ward)

Sedation Avoid benzodiazepines; if sedation is needed, dexmedetomidine is preferred when light sedation and delirium reduction are priorities Drugs to stop All deliriogenic and renally accumulating drugs — opioids (especially morphine), gabapentinoids, H2-blockers, anticholinergics; recheck antibiotic doses daily as renal function changes (cefepime neurotoxicity presents exactly like this)

Supportive VTE prophylaxis, stress-ulcer prophylaxis where indicated, nutrition (protein without overloading urea), pressure-injury prevention, early mobilisation, bowel and bladder care, correction of anaemia Goals of care Assess pre-morbid frailty and function with CGA; discuss ceiling of care, dialysis initiation and resuscitation status early with family — frailty predicts outcome better than age Latest Updates (2023–Present)

Surviving Sepsis Campaign 2026 guidelines (Crit Care Med, April 2026) — the first full update since 2021, based on evidence to June 2025. Notable directions: narrower empirical cover (recommendation against anti-anaerobic agents in patients at low risk of anaerobic infection), acceptance in low-resource settings that a single set of blood cultures gives similar yield to multiple sets, stronger emphasis on taking cultures before antimicrobials (sensitivity falls by roughly a third within about 70 minutes of the first dose), and a new block on post-sepsis recovery — shared decision-making, structured discharge information and follow-up for new long-term impairments.

Post-sepsis syndrome is now formally part of sepsis care: survivors need follow-up for new physical, cognitive and psychological impairment — especially relevant because delirium during sepsis predicts long-term cognitive decline. PADIS Focused Update 2025: dexmedetomidine over propofol for light sedation; enhanced mobilisation/rehabilitation over usual care; melatonin suggested; no antipsychotic recommended for prevention or treatment. KDIGO-aligned practice continues to stress full loading dose then renal dose adjustment, avoidance of nephrotoxins, and early nephrology involvement rather than fixed creatinine thresholds for RRT. Indian context: emphysematous pyelonephritis, diabetic foot sepsis, tuberculosis and mucormycosis are disproportionately common causes of septic shock in Indian diabetics. Access to continuous RRT is limited outside tertiary centres; the Pradhan Mantri National Dialysis Programme and AB-PMJAY cover much of the dialysis cost burden and should be mentioned in the social-care part of the answer.

Current Practice Update

Issue Textbook / earlier position Current practice (2023–2026)

Fluid resuscitation Fixed 30 mL/kg crystalloid bolus Individualised, dynamically assessed boluses — particularly in CKD and heart failure Empirical antibiotics Broadest possible cover Broad but targeted; SSC 2026 advises against routine anti-anaerobic cover at low anaerobic risk; daily de-escalation review Blood cultures Two or more sets always Still preferred, but a single set is acceptable in low-resource settings; taking them before antibiotics matters more than the number Sedation choice Propofol or dexmedetomidine over benzodiazepines Dexmedetomidine preferred over propofol for light sedation and delirium reduction Antipsychotics in ICU delirium Recommended against routinely (PADIS 2018) No recommendation for or against treatment; explicitly recommended against for prevention After discharge Little guidance Formal post-sepsis follow-up for cognitive, physical and psychological sequelae Exam One-Liners — Q3 Altered sensorium is an organ-failure sign in sepsis (qSOFA item).

Commonest source in a diabetic with CKD = urinary tract; think emphysematous pyelonephritis. Cultures before antibiotics; antibiotics within 1 hour.

Noradrenaline first-line; target MAP ≥ 65 mmHg.

In CKD — load fully, then dose-adjust; think cefepime neurotoxicity.

Source control within 6–12 hours.

RRT indications = AEIOU.

Glucose target roughly 140–180 mg/dL; stop sulfonylureas.

Delirium care = ABCDEF bundle + CAM-ICU screening.

Survivors need post-sepsis follow-up for cognitive decline.

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