Description

Local Anaesthetic Gel for Minor Procedures and Catheterisation

Instillagel Pre-Filled Syringes Overview

Instillagel Pre-Filled Syringes are a topical local anaesthetic gel used to provide temporary numbness and lubrication of mucous membranes before minor procedures such as catheterisation, cystoscopy, or urethral examination. It contains lidocaine hydrochloride, which numbs the surface it contacts, helping reduce discomfort during instrumentation.

In the UK, Instillagel is classed as a medical device, not a medicinal drug, and is supplied in pre-filled syringes for hygienic, ready-to-use application.

Understanding Local Anaesthesia for Mucosal Procedures

Why mucosal anaesthesia is needed

Procedures involving the urethra or other mucosal surfaces can cause pain or discomfort due to the high sensitivity of these tissues. Applying a local anaesthetic gel beforehand helps:

• reduce pain during insertion of probes, catheters, or instruments
• relax local muscle tone
• improve procedural tolerance for the patient

This approach is widely used in primary care, urology, and hospital settings.

What lidocaine does

Lidocaine is a well-established local anaesthetic that blocks nerve conduction when applied topically. It works quickly and provides numbness at the site of application without affecting the rest of the body when used as directed.

What Are Instillagel Pre-Filled Syringes?

Instillagel Pre-Filled Syringes consist of a sterile gel containing lidocaine hydrochloride (typically 2% w/w) combined with a lubricant base. The gel is supplied in individually sealed, single-use 11 ml syringes, making it convenient and hygienic for clinical use.

The product is often used:

• prior to urinary catheterisation
• before cystoscopic procedures
• before passage of instruments across sensitive mucosal areas

It helps reduce discomfort and provides lubrication to ease instrument insertion.

How Does Instillagel Work?

Mechanism of action

Lidocaine in Instillagel blocks sodium channels in nerve membranes at the application site. This prevents nerve depolarisation and transmission of pain signals to the brain. The result is localised numbness that reduces the sensation of discomfort during procedures.

Onset and duration

Instillagel’s anaesthetic effect typically begins within a few minutes of application. The duration of action is sufficient to cover most short procedures requiring instrument passage.

What Instillagel Helps With — and What It Does Not

What it helps with

Instillagel is used to:

• reduce discomfort during urethral catheterisation in adults and children
• provide local numbing before minor cystoscopy or urological examination
• improve patient comfort during insertion of probes or instruments where topical lubrication and anaesthesia are required

What it does not treat

Instillagel does not:

• treat infection, inflammation, or underlying urinary conditions
• cure catheter-associated discomfort after the procedure
• replace general anaesthesia for invasive surgery

If pain or symptoms persist after the procedure, clinical assessment is needed.

Who Is Instillagel Suitable For?

Instillagel may be suitable for:

• adults and children (according to professional guidance) undergoing short mucosal procedures
• patients requiring urethral catheterisation
• use in primary care, secondary care, and community settings

It is typically administered by trained healthcare professionals as part of a procedure.

Who Should Avoid Instillagel

Instillagel should not be used if:

• the patient has known allergy to lidocaine or any component of the gel
• the mucosa is severely inflamed or ulcerated unless advised
• there is a risk of aspiration into the airway

Blood levels of lidocaine should be considered in patients with severe liver impairment, as lidocaine metabolism is hepatic.

How to Use Instillagel Pre-Filled Syringes

Application guidance

• Ensure the syringe is unopened and sterile
• Attach appropriate catheter or applicator if required
• Instill the gel slowly into the urethral meatus or target mucosa
• Allow a few minutes for the anaesthetic effect before proceeding

Dosage and application method should follow local clinical protocols and manufacturer instructions.

Practical usage advice

• Do not reuse pre-filled syringes
• Monitor the patient for comfort and adverse reactions
• Ensure appropriate record-keeping and disposal as clinical waste

Safety, Warnings and Side Effects

Local side effects

Some patients may experience:

• mild burning or stinging at application
• temporary numbness beyond the site
• minor irritation

These effects are usually transient.

Systemic considerations

Although lidocaine is largely localised, systemic absorption can occur, particularly with large volumes or damaged mucosa. Signs of systemic lidocaine effects include dizziness, tinnitus, or numbness beyond the site; these require clinical evaluation.

When to Seek Medical Advice

Healthcare professionals should reassess if:

• discomfort does not improve with local anaesthesia
• there are signs of allergic reaction (rash, swelling, difficulty breathing)
• systemic symptoms develop after application
• the underlying condition appears more serious

Use in Pregnancy and Breastfeeding

Instillagel may be used in pregnancy or breastfeeding if clinically indicated, as systemic absorption is minimal when applied topically. However, clinical judgement and specialist guidance should be sought.

How Instillagel Compares to Other Local Anaesthetics

Instillagel vs lidocaine sprays or ointments

Instillagel provides a gel vehicle with lubrication, making it particularly suitable for instrument passage, whereas sprays or ointments may be more applicable to other mucosal surfaces.

Instillagel vs injectable local anaesthetics

Injectable anaesthetics are used for deeper blockade. Instillagel provides surface numbing only and is appropriate for non-invasive procedures.

Supporting Comfort and Procedure Tolerance

To maximise comfort:

• explain the procedure to the patient
• apply gel and allow time for effect before instrument insertion
• combine oral analgesia where appropriate

Instillagel Pre-Filled Syringes Summary

Instillagel Pre-Filled Syringes provide effective local topical anaesthesia and lubrication for procedures involving sensitive mucosal areas such as the urethra. With lidocaine as the active anaesthetic, they help reduce discomfort during short procedures and improve patient experience when used as directed by trained professionals.