Clinical Toolbox – Free Medical Calculators & Guidelines (ABG, ECG, Dosing, Vaccines) by Dr.Lakdhesz

Clinician Toolbox

© 2025 by Dr Lakdhesz. Educational support only — confirm with local guidelines.

Renal & Hepatic Dose Adjuster

Cockcroft-Gault (Creatinine Clearance)

Age (years)

Sex MaleFemale

Weight (kg)

Height (cm) (for IBW, optional)

Serum Creatinine

umol/Lmg/dL

Weight to use Actual weight IBW (ideal) AdjBW (if >120% IBW)

Note: Use formulary bands for dosing. Consider measured CrCl/eGFR in extremes or rapidly changing renal function.

Child-Pugh (hepatic reserve)

Encephalopathy None (0)Grade I-IIGrade III-IV

Ascites NoneMild/controlledSevere/refractory

Bilirubin

umol/Lmg/dL

Albumin

g/Lg/dL

INR

Fluids & Electrolytes

Maintenance Fluids

Age group AdultPaediatric

Weight (kg)

Deficits (rough guides)

SexMaleFemale

Age (years)

Weight (kg)

Na current (mmol/L)

Na target (mmol/L)

K current (mmol/L)

K target (mmol/L)

HCO3 current (mmol/L)

HCO3 target (mmol/L)

Safety: aim max 10 mmol/L sodium change in 24 h (8 if high risk). Replace potassium slowly with ECG/renal monitoring. Use local protocols.

Clinical Decision Hub

CURB-65 (pneumonia severity)

ConfusionNoYes

Urea > 7 mmol/LNo/unknownYes

RR >= 30/minNoYes

BP (SBP < 90 or DBP <= 60)NoYes

Age >= 65NoYes

Wells (pulmonary embolism)

Clinical DVT signsNoYes (3)

PE more likely than alternativeNoYes (3)

Heart rate > 100NoYes (1.5)

Immobilisation/surgery < 4 wNoYes (1.5)

Prior DVT/PENoYes (1.5)

HemoptysisNoYes (1)

MalignancyNoYes (1)

CHA2DS2-VASc (AF stroke risk)

Age

SexMaleFemale

CHF/LV dysfunctionNoYes

HypertensionNoYes

DiabetesNoYes

Stroke/TIA/TENoYes (2)

Vascular diseaseNoYes

Malaysia (KKM) — Child Vaccine Scheduler

Date of birth

State-specific doses Peninsular / Sarawak (no Sabah 6 m measles) Sabah (add measles at 6 months) Sarawak (add JE at 12 and 21 months)

Child sex (for HPV 13 y)FemaleMale

Cross-check with latest MOH/KKM circulars for catch-up and brand specifics.

Procedures Checklists

Choose a procedure Indwelling Urinary Catheter (IDC) Nasogastric Tube (NGT) Arterial Blood Gas (ABG) Lumbar Puncture (LP) Pleural Tap (Thoracentesis)

Concise safety checklists. Adapt wording to your hospital policy.

Disclaimer: Educational reference only. Verify doses and decisions with senior review and local formulary.