Urinalysis Dipstick: Reagent Strip Technique & Bedside Interpretation

A urinalysis dipstick is a plastic strip impregnated with chemical pads that change colour when dipped in urine. It gives nurses a fast screen for problems such as urinary tract infection, undiagnosed type 2 diabetes, dehydration, or bleeding—often before laboratory results return.

Dipsticks complement, but do not always replace, laboratory urinalysis (microscopy and automated chemistry). Pair abnormal bedside findings with orders for culture, renal function, or imaging when the patient’s story warrants it—for example painful urination with fever, blood in the urine, or sepsis screening in an older adult with new confusion.

Macroscopic assessment takes seconds and prevents chasing a chemistry artefact.

• Colour: pale yellow suggests adequate hydration in many patients; dark amber may reflect concentration or bile pigments—interpret with fluid status and intake and output monitoring.
• Clarity: cloudy urine may indicate infection, crystals, or contamination with vaginal discharge or semen—note whether it clears after centrifugation on formal lab testing.
• Odour: offensive or sweet odours can support infection or ketonaemia work-ups but are not diagnostic alone.
• Visible blood: red or brown urine with a positive haemoglobin pad warrants urgent clinical review even if the patient reports no pain.

The source changes what a positive pad means.

When the question is bacteriuria requiring treatment, the team may still need a freshly obtained specimen sent to the laboratory even if a bedside strip was already positive.

Each pad has its own reaction time on the manufacturer insert—reading early or late is a common bedside error.

1. Check strip expiry and store strips in a closed container away from humidity and direct light.
2. Mix urine gently if sediment is visible; do not shake vigorously.
3. Immerse all pads fully for the seconds stated on the pack—usually brief immersion, not prolonged soaking.
4. Remove excess urine by wiping the strip on the container rim or blotting per instructions so pads do not run into each other.
5. Place horizontally on a clean dry surface or hold without pads touching the glove.
6. Read at stated intervals—for many strips, leukocyte esterase and nitrite are read at about one to two minutes, while glucose and protein may need longer. Use one timer or watch per strip.
7. Compare under consistent lighting to the colour chart on the bottle; document the closest match, not an interpretation word alone.

Institutional protocols may vary for which pads are mandatory on your unit (for example obstetric or renal pathways).

Dipsticks screen—they do not diagnose. Use the table to question unexpected pads.

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• Dysuria, frequency, or suprapubic discomfort with suspected UTI
• New or worsening confusion in older adults when urinary sepsis is on the differential
• Fever without clear source during sepsis assessment
• Monitoring known renal disease, stones, or fluid states with acute kidney injury concern
• Antenatal or diabetes reviews when glycosuria or proteinuria screening is ordered
• Pre-operative or admission screening per local pathway

• No valid order or standing protocol authorising point-of-care urinalysis
• Specimen visibly contaminated with stool, glove powder, or unmatched patient label
• Urine more than the maximum hold time allowed locally—recollect rather than test stale sample
• Recent bladder irrigation or instillation unless the team specifies how to sample
• Patient unable to provide appropriate sample and catheter access restricted—clarify with prescriber

• In-date reagent strips in sealed container with manufacturer colour chart
• Clean urine collection container (sterile when culture is also planned)
• Timer or watch, good lighting, disposable gloves
• Clinical waste bin and hand hygiene supplies
• Labelled transport container if sending paired laboratory sample per specimen collection principles

1. Verify identity with two identifiers and confirm the urinalysis order.
2. Explain the test in plain language—no special preparation for most screens unless fasting glucose is also required.
3. Offer privacy and assist with positioning; provide peri-care supplies for clean-catch when needed.
4. Perform hand hygiene and apply gloves before handling urine.
5. Collect adequate volume—institutional protocols may vary; many strips need only a few millilitres but culture needs more.

Pediatric / older adult notes: In children, bag urine is convenient but easily contaminated—confirm acceptable use locally. In older adults, delirium may be the only UTI symptom; document baseline mental status.

1. Inspect the urine for colour, clarity, and odour; note findings before dipping.
2. Prepare the strip—remove immediately before use; do not touch reactive pads.
3. Dip and blot per manufacturer instructions.
4. Start timers for each read window; read pads in order stated on the insert.
5. Record each pad against the chart scale (for example trace, 1+, 2+).
6. Dispose of strip and urine in clinical waste; remove gloves and perform hand hygiene.
7. Escalate significant combinations (nitrite with leukocyte esterase, heavy blood, positive ketones in diabetes) per protocol.
8. Send laboratory specimen when ordered—label at bedside if a paired sample is required.

Sterility checkpoint: If culture is collected in the same encounter, use sterile technique and avoid touching the inside of the container or lid.

• Reassess symptoms and vital signs after significant positives
• Encourage oral fluids when not fluid-restricted and clinically appropriate
• Provide continence aids and skin care if frequent voiding or incontinence
• Track response after antibiotics—urine may remain dipstick-positive for days while symptoms should improve

• Date, time, and specimen source
• Macroscopic description and each relevant pad result
• Symptoms, temperature, and mental status when relevant
• Notification, culture orders, and patient education provided

• False reassurance from a negative strip in a strongly symptomatic patient
• Overtreatment of asymptomatic bacteriuria based on dipstick alone in catheterised patients
• Pre-analytic error—wrong patient label, delayed reading, expired strip
• Exposure risk if splash to mucous membranes—follow occupational health policy

• Nitrite and/or leukocyte esterase positive with fever, rigors, flank pain, or acute confusion
• Visible haematuria or strongly positive blood pad—especially with clot retention or pain suggesting kidney stones
• Positive ketones with vomiting, Kussmaul breathing, or known diabetes—check capillary glucose per protocol
• Anuria or rapidly falling urine output with abnormal pads—consider obstruction and basic metabolic panel review
• Pregnancy with proteinuria or significant blood—obstetric escalation per local pathway

• Write pad results on the chart before memory fades—colour blocks darken or fade after the read window.
• If the strip smells strongly of bleach, check whether the container was rinsed with incompatible cleaners.
• Pair a positive infection screen with urine output trend—not every colonised catheter needs antibiotics.
• When delirium is present, repeat the dipstick on a fresh sample before attributing confusion to “UTI colonisation.”

Cloudy catheter urine can mislead a busy screen—use NCLEX-style clinical judgment practice for urinalysis dipstick work: priority action on specimen quality, select-all-that-apply pad timing and IPC, post-test trend interpretation when infection pads stay positive, matrix escalation for haematuria versus obstruction, and documentation cloze (recognise cues → analyse → prioritise → act → evaluate outcomes).

About the author: Sid A. Abdala Balal, RN, writes evidence-based nursing education focused on practical bedside skills, patient safety, and clinical decision support for nurses.

Medical review: This guide is reviewed by Dr. Adam Sayedi, MD, for clinical accuracy, clarity, and alignment with current nursing standards for urinalysis dipstick testing.

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