Secondhand Nellcor N-20 PA Handheld Pulse Oximeter

Objective AI Report

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Report date: 18.12.2025

Nellcor N-20 PA Pulse Oximeter Analysis Report

Device Identification

The device in the examined visuals is a handheld (portable) monitor used for medical measurement and monitoring. As a result of the visual analysis, it has been determined that the device is a pulse oximeter designed to measure patients’ blood oxygen saturation ($SpO_2$) and pulse rate. The device is housed in a yellow, rubber or silicone protective boot to protect it from external impacts.

Brand and Model

The embossed writings and labels located on the front surface of the device and the lower part of the protective yellow boot have been examined:

• Brand: The inscription “NELLCOR” is embossed in capital letters on the front lower part of the product’s yellow protective boot. This definitively confirms that NELLCOR is the manufacturer of the device.
• Model: The inscription “N-20 PA” is clearly legible in the gray area on the device’s front panel, at the bottom left of the screen. This unequivocally indicates that the device’s model number is N-20 PA.

Originality

The craftsmanship of the logo on the product, the perfect fit of the protective boot to the device, the print quality on the front panel, and the font of the model number appear to be consistent with original NELLCOR standards. No indications of counterfeit production, low-quality label application, or incompatible part assembly have been observed. Based on visual data, the product is deemed original.

Areas of Use

The Nellcor N-20 PA is used to non-invasively measure blood oxygen levels ($SpO_2$) and pulse rate ($/min$). This device is suitable for use:

• In hospital emergency rooms, intensive care units, or during patient transfer processes,
• In ambulances and first aid interventions,
• For providing immediate status checks for home care patients.

Thanks to its portable design and protective boot, it is particularly suitable for use in mobile healthcare services.

Quantity Information

The visuals show 1 (one) Nellcor N-20 PA device. The yellow protective boot and carrying strap attached to the device have been considered part of the device. An external sensor, box, or charging adapter is not present in the visuals.

General Condition

The cosmetic condition of the device has been assessed as “used.” There are accumulated dirt and discoloration on the yellow protective boot due to time. However, the integrity of the device is intact, and its parts appear to be in place.

Physical Deformation

During the detailed examination, the following physical conditions were identified:

• Protective Boot: The yellow rubber boot shows superficial dirt, black stains, and slight abrasions due to use. However, no torn or detached sections are visible.
• Casing: No deep scratches, cracks, or breaks were detected on the gray plastic casing visible through the boot’s opening.
• Carrying Strap: Slight fraying of threads on the edges of the black woven strap and discoloration (dirt) on its white stripe are observed. The strap’s attachment points appear sturdy.

Mechanical Components

The mechanical components of the device generally appear sound. The battery compartment cover (gray sliding cover) visible at the rear is in place and closed. The transparent plastic piece protecting the socket input on the side is present and appears unbroken. The snap mechanism of the carrying strap appears visually functional.

Electronic Components

The device is in an off state in the visuals, therefore its electronic functions cannot be tested. However:

• No cracks, breaks, or LCD deformation described as “ink bleed” are visible on the screen panel.
• The “Alarm Mute” button (with a bell icon) on the front panel is physically in place.
• Although the condition of the pins in the sensor input socket cannot be clearly discerned from the outside, the socket housing appears clean.

Accessories

The product includes the following as built-in or external accessories:

• Protective Boot: An integrated, yellow Nellcor-branded original protective boot is present on the device.
• Carrying Strap: A black and white strap mounted on the side of the device, intended for hand or shoulder carrying, is present.
• Missing Parts: The SpO2 probe (finger sensor), which is necessary for the device to perform measurements, is not present in the visuals. Furthermore, no power adapter or battery is externally shown in the visuals.

Battery Status

The device’s battery compartment is located on the rear-side. Since the cover is closed, there is no visual data regarding the presence, type (rechargeable or AA/AAA battery), or condition (whether it has leaked or swollen) of the battery or cell inside.

Label Information

On the front surface of the device, there is an instruction label written in German. The label content includes the following headings:

• Kurzanweisung zur Inbetriebnahme des N-20PA: Short instruction for operating the N-20PA.
• Benutzung des Monitors: Use of the monitor (Instructions for connecting the sensor and placing it on the patient).
• Alarmsignale: Explanations regarding alarm signals.
• N-20 PA: The model number is clearly stated.
• Additional Symbols: Explanations of functional buttons such as the bell icon (alarm) and battery icon (battery check) are mentioned in the text.

A technical label containing the serial number, lot number, or production date is not visible in these visuals, as it is likely located on the rear surface of the device or inside the battery compartment.

Screen Analysis

The device’s screen is off in the visual, but the indicator areas statically marked on the panel are:

• SpO2 %: The upper area where the oxygen saturation value will be displayed.
• (Heart Icon) / min: The middle area where the pulse rate will be displayed.
• A vertical bar graph area (for pulse signal strength) is located on the right side.

Size and Compatibility

The device is a portable unit designed to be held in one hand. Its sensor input port appears compatible with standard Nellcor-type sensors (typically 9-pin or similar customized sockets). The device is suitable for adult, pediatric, or neonatal use, but this compatibility is determined by the type of sensor attached to the device. The presence of “NEONATEN” (Neonates) and “ERWACHSENE” (Adults) in the front panel text confirms that the device’s alarm limits can be set for both patient groups.

Current Malfunction

There is no clear evidence in the visuals indicating that the device is malfunctioning (e.g., broken screen, detached cable, damaged port). The device’s integrity is complete.

Potential Malfunction Risk

Considering the “used” condition of the device and the dirt on the rubber boot, it appears that the device requires hygienic cleaning. The exposed nature of the socket inputs (even with a transparent protector) may have led to dust accumulation over time; this situation could create a risk of poor contact in sensor detection. Furthermore, due to it being an older model, it is recommended to check the condition of the internal battery or battery contacts.