Therapeutic Laser Pulse Duration With Precooling Temperature Control

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Solution Overview

Problem

Existing dermatological laser systems lack precise control over skin temperature during treatment, leading to inconsistent thermal damage to target and non-target structures, particularly for deeper skin conditions like acne, due to variations in skin thickness and composition.

Innovation Solution

The system employs a contact cooling element with a cooling window to precool the skin, monitors skin temperature using infrared energy, and adjusts laser pulse duration based on real-time temperature measurements to maintain target skin temperature within a desired range, minimizing damage to non-target structures.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If laser pulse duration is extended to achieve adequate thermal damage to deeper target structures, then treatment efficacy for deeper skin conditions is improved, but thermal damage to overlying non-target structures increases

Engineering Contradiction:

Improvethermal damage control to target structuresVSAvoidthermal damage to non-target structures

Core Design Contradiction:

Manufacturing precisionVSObject-affected harmful factors

Solution Approach 1:

The system applies cooling to the skin surface before laser pulse delivery to pre-establish a temperature baseline. This preliminary cooling action creates a thermal buffer that protects overlying structures during the extended laser pulse, allowing deeper targets to receive adequate energy while preventing excessive heating of superficial tissues.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system continuously monitors skin temperature during laser pulse delivery using infrared sensing and dynamically adjusts the laser output in real-time based on measured temperature deviations. This feedback control ensures that the target structure receives sufficient thermal energy for effective treatment while automatically preventing overheating of non-target structures.

Inventive Principle:

Principle #23Feedback

2Ease of operation

If fixed laser pulse parameters are used for all skin types, then device operation is simplified, but treatment consistency across varying skin thickness and composition deteriorates

Engineering Contradiction:

Improvelaser parameter settingVSAvoidtreatment consistency

Core Design Contradiction:

Ease of operationVSManufacturing precision

Solution Approach 1:

The system dynamically adjusts laser pulse parameters including duration, energy, and repetition rate based on real-time temperature measurements and skin characteristics. This dynamic adaptation allows the same device to effectively treat diverse skin types and conditions without requiring manual reconfiguration, maintaining both operational simplicity and treatment precision.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system automatically modifies key laser parameters such as pulse duration, fluence, and pulse interval based on detected skin properties and real-time temperature feedback. These parameter changes enable consistent treatment outcomes across varying skin thickness and composition while keeping the user interface simple and requiring minimal user input.

Inventive Principle:

Principle #35Parameter changes

3Measurement precision

If real-time temperature monitoring and dynamic pulse adjustment are implemented, then temperature control precision is improved, but system complexity increases

Engineering Contradiction:

Improveskin temperature measurementVSAvoidsystem architecture

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The cooling element serves multiple functions simultaneously: it cools the skin surface to protect non-target structures, provides a thermal baseline for temperature monitoring, and enhances laser energy delivery to deeper structures. This multi-functionality reduces the need for separate dedicated components, thereby limiting the increase in system complexity while achieving precise temperature control.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The system combines the cooling delivery mechanism with the temperature sensing and laser delivery systems into an integrated treatment head. By merging these functions into a unified structure, the system achieves precise real-time temperature monitoring and dynamic control without proportionally increasing overall system complexity.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS12515066B2Systems and methods for controlling therapeutic laser pulse duration

Publication Date: 2026.01.06 CUTERA

AI summary

Dermatological systems and methods for providing a therapeutic laser treatment wherein the duration of a therapeutic laser pulse is based on one or more determinations of a surface temperature of the skin during the delivery of the pulse. Initiation of the therapeutic laser pulse may be based on sensed skin temperature during a cooling of the skin prior to initiation of the pulse.