伤口敷料的性能评价项目

结论：吸得住、不干也不泡、揭下来不伤伤口，是三条主线

伤口敷料的功能是管理伤口的渗液并维持适宜的愈合环境。核心的性能围绕三件事：

吸收与保持。 能吸收多少渗液、吸收后能否保持住（受压时不回渗）。

环境维持。 保持伤口湿润但不过度浸渍——太干延缓愈合，太湿浸渍周围皮肤。 这依靠吸收量和透湿量的平衡。

揭除时的影响。 揭除时是否损伤新生组织、是否残留、是否疼痛。

这三条都是可以测量的，而不只是靠临床经验判断。

敷料的分类

不同类型的考察侧重不同，但吸收与透湿是多数类型的共同项目。

吸收性能的考察

吸收量。 单位面积能吸收的液体量。

吸收速度。 吸收的快慢，影响对大量渗液的应对。

吸收的方向性。 垂直吸收（锁在敷料内）还是横向扩散（可能浸渍周围皮肤）。

受压后的回渗。 吸收后受压时液体是否回渗到伤口面。这一项很重要，因为敷料在使用中会受压（体重、绷带、衣物）。

吸收后的形态保持。 吸收后是否解体、是否仍能整片揭除。

测试液。 应当使用模拟渗液的溶液，而不是纯水——渗液含蛋白质和电解质，对吸收性能的影响与纯水不同。

「受压回渗」是实用的区分指标。 两种敷料吸收量相同，但一种受压后回渗明显、另一种能锁住，实际的临床表现差别很大。

透湿性能的考察

水蒸气透过率。 单位时间单位面积透过的水蒸气量。

与吸收的配合。 透湿量与吸收量共同决定了敷料的渗液管理能力。

透湿的平衡。 透湿过低导致积液和浸渍，过高导致伤口干燥。

不同状态下的透湿。 干燥状态与吸液后的透湿量可能不同。

测试条件。 温度、湿度梯度要规定。

「吸液后的透湿量」值得单独测，因为某些敷料吸液后结构改变，透湿性能随之变化。

与伤口的相互作用

粘附性。 对伤口床的粘附程度。理想的是对伤口不粘、对周围皮肤适度粘。

揭除力。 揭除时所需的力，影响疼痛和组织损伤。

残留。 揭除后是否有材料残留在伤口内。

纤维脱落。 纱布类和纤维类敷料的脱落纤维可能成为伤口内的异物。

对新生组织的影响。 揭除时是否损伤新生的肉芽和上皮。

「揭除力与残留」是使用者感受和临床效果的关键。 粘附过强的敷料揭除时疼痛且可能损伤伤口，这一项应当测量而不是靠描述。

粘贴与周围皮肤

对于有粘贴边的敷料：

初始粘贴力。 贴上后的粘贴程度。

持久性。 佩戴期间的粘贴保持。

潮湿条件下的粘贴。 出汗、渗液、洗澡。

对皮肤的影响。 反复粘贴撕除对皮肤的损伤。

顺应性。 在关节等活动部位的贴合。

「潮湿条件下的粘贴」是实际的考察，因为伤口周围往往是潮湿的。

材料与生物相容性

接触性质。 与破损组织接触，要求较严。

接触时间。 敷料的佩戴时间。

项目。 细胞毒性、刺激、致敏是基础项目。

含活性成分的额外考虑。 释放的物质及其局部和全身影响。

加工残留。 生产过程的残留物。

「含活性成分的敷料」评价范围更广，因为除了材料本身，释放的活性成分也要评价，而且要验证释放的量和持续时间。

无菌与包装

无菌。 多数敷料是无菌产品。

灭菌方式的相容。 与材料和活性成分的相容，某些活性成分对灭菌敏感。

包装。 无菌屏障、便于无菌取用。

有效期。 材料和功能的稳定性。

开封后的使用。 单片包装还是多片包装。

使用体验相关的考察

顺应性。 在身体曲面和关节部位的贴合。

厚度。 影响衣物下的隐蔽性和舒适。

柔软度。 佩戴时的感受。

裁剪性。 能否裁剪到合适尺寸、裁剪后边缘是否散边。

可视性。 透明敷料便于观察伤口而不必揭除。

防水性。 能否洗澡。

「可视性」有实际的临床价值，因为不必揭除就能观察伤口，减少了对愈合的干扰。

特定宣称的验证

抗菌宣称。 需要相应的抗菌效能数据，以及持续时间。

促愈合宣称。 涉及临床效果，举证要求高。

减痛宣称。 需要相应的证据，比如揭除力数据加使用者评价。

防瘢痕宣称。 同样涉及临床效果。

「宣称与证据的匹配」是这类产品的常见问题 ——宣称越接近临床效果，需要的证据层级越高，而物理性能数据只能支撑物理层面的宣称。

送检准备的建议

提供产品类型与结构；说明适用的伤口类型和渗液量；提供声称的佩戴时间；说明宣称的功能；提供配套产品（如果有）；以及准备足够样品。

常见的评价误区

用纯水测吸收。 数据偏离实际渗液条件。

只测吸收不测回渗。 吸得进不代表锁得住。

只测干态透湿。 吸液后的透湿可能不同。

揭除力未测量。 靠描述而无数据。

老化后性能未验证。 储存后的性能可能下降。

这五项建议作为敷料评价方案的检查要点。

我们的做法

做敷料测试时，我们建议用模拟渗液而不是纯水做吸收和透湿测试，因为渗液的成分影响吸收行为，纯水的数据偏离实际。

「受压回渗」是我们建议加做的项目，因为它区分了「吸得进去」和「锁得住」，而后者才是临床关心的。

对于含活性成分的产品，释放性能的验证是重点，包括释放的量、速度、以及持续时间，这些数据是功能宣称的依据。

如果你有敷料类产品需要安排检测，想先理清项目，可以把产品类型和宣称发过来一起讨论，或者直接联系：132 4819 8029。能力范围见服务介绍，送检要求见送检要求，流程见检测流程。

English version

Conclusion. Wound dressings manage exudate and maintain an environment suited to healing. Their core performance centres on three things. Absorption and retention, meaning how much exudate can be absorbed and whether it stays absorbed under compression. Environment maintenance, meaning keeping the wound moist without maceration, since too dry delays healing and too wet macerates surrounding skin, which depends on the balance between absorption and moisture vapour transmission. And behaviour on removal, meaning whether new tissue is damaged, whether residues remain and whether removal is painful. All three are measurable rather than matters of clinical impression alone.

Types of dressing. Gauze is traditional and inexpensive, assessed for absorption and fibre shedding. Films are transparent and waterproof, assessed for moisture transmission, adhesion and conformability. Foams absorb heavily, assessed for absorption, pressure distribution and moisture transmission. Hydrocolloids maintain moisture, assessed for absorption, gel formation and adhesion. Alginates absorb heavily and gel, assessed for absorption, gelling and ease of removal. Hydrofibres absorb vertically, assessed for absorption, fluid lock and integrity. And dressings with active ingredients, such as antimicrobials, are assessed for release performance and functional verification. Emphasis differs by type, while absorption and moisture transmission are common to most.

Examining absorption. Absorption capacity covers fluid absorbed per unit area. Absorption rate covers how quickly, which affects handling of heavy exudate. Directionality covers whether absorption is vertical, locking fluid within the dressing, or lateral, which may macerate surrounding skin. Retention under compression covers whether fluid returns to the wound surface when pressed, which matters because dressings are compressed in use by body weight, bandages and clothing. And structural retention after absorption covers whether the dressing disintegrates or can still be removed in one piece. The test fluid should simulate exudate rather than being pure water, since exudate contains protein and electrolytes whose effect on absorption differs from water. Retention under compression is a practical discriminator: two dressings may absorb equally while one releases fluid back under pressure and the other holds it, and their clinical behaviour differs markedly.

Examining moisture transmission. Moisture vapour transmission rate covers vapour passing per unit area and time. Its interaction with absorption determines exudate management capability together. Balance matters, since too little transmission causes pooling and maceration and too much dries the wound. Transmission in different states may differ between dry and wet dressings. And test conditions must specify temperature and humidity gradient. Transmission after absorption deserves separate measurement, since some dressings change structure when wet and their transmission changes with it.

Interaction with the wound. Adhesion covers how strongly the dressing adheres to the wound bed; ideally it does not adhere to the wound while adhering moderately to surrounding skin. Removal force covers the force required, which affects pain and tissue damage. Residues cover material left in the wound after removal. Fibre shedding matters for gauze and fibrous dressings, since shed fibres become foreign bodies in the wound. And the effect on new tissue covers damage to granulation and epithelium during removal. Removal force and residues are key to both user experience and clinical outcome: an over-adherent dressing hurts on removal and may damage the wound, and this should be measured rather than described.

Adhesion and surrounding skin. For dressings with adhesive borders, initial adhesion covers how well it sticks. Durability covers retention during wear. Adhesion under moisture covers perspiration, exudate and bathing. Effect on skin covers damage from repeated application and removal. And conformability covers fit over joints and mobile areas. Adhesion under moisture is the practical assessment, since periwound skin is often damp.

Materials and biocompatibility. Contact nature involves breached tissue, which is demanding. Contact duration covers the wear period. Items cover cytotoxicity, irritation and sensitisation as a base. Active ingredients bring additional considerations covering released substances and their local and systemic effects. And processing residues cover what manufacture leaves. Dressings with active ingredients face a wider evaluation, since beyond the materials themselves the released agent must be evaluated and both the quantity and the duration of release verified.

Sterility and packaging. Most dressings are sterile products. Sterilisation must be compatible with materials and active ingredients, some of which are sensitive. Packaging must provide a sterile barrier and permit aseptic presentation. Shelf life covers the stability of materials and function. And in-use considerations cover whether packs are single or multiple.

How we handle it. For dressing testing we suggest using simulated exudate rather than pure water for absorption and moisture transmission, since exudate composition affects absorption behaviour and water-based data diverge from reality. Retention under compression is an item we suggest adding, since it separates absorbing from holding and holding is what matters clinically. For products with active ingredients, verifying release performance is the focus, covering quantity, rate and duration, since those data underpin the functional claim.

Send us the product type and intended claims and we will work through the items. Phone or WeChat: +86 132 4819 8029.