A complete guide to cottonoids — what they are, what they're made of, how they're sized, why they're X-ray detectable, and how the two brands most U.S. hospitals order (FABCO and American Surgical Ray-Cot®) compare.
Neuro patty sponges (also called cottonoids) are small sterile rayon squares used during neurosurgery, spine, ENT, and ophthalmic procedures to protect delicate tissue and absorb blood. Every patty is X-ray detectable and has a locator string so the surgical team can track and retrieve it. In the U.S. the two most-ordered brands are American Surgical Ray-Cot® (made in Salem, MA — the standard in most U.S. hospitals) and FABCO (an alternative many surgeons request by protocol). Sterile Mate stocks both.
A neuro patty sponge is a small, sterile, absorbent square used during any surgical procedure where the operative field is delicate and requires simultaneous tissue protection and fluid absorption. The classic use case is neurosurgery — draping a patty over the exposed cortex to shield the brain from a retractor blade while wicking away irrigation and blood — but the same devices are used in spine surgery (dura protection), ENT (nasal / sinus / mastoid procedures), ophthalmology (orbital and lacrimal work), and pediatric general surgery.
Every neuro patty carries three features that distinguish it from a generic gauze sponge:
A radiopaque barium sulfate line — visible on an intraoperative or recovery-room X-ray so a retained patty can be found before closure or on the film.
A securely attached locator string — typically a bright blue polyester monofilament that hangs outside the wound so the scrub can pull the patty out cleanly.
A count-verification card — patties ship 10 to a card so the circulator can confirm the count matches the surgical safety checklist before, during, and after the procedure.
The combination of those three features is why the OR team calls out the count on every neuro sponge just as they do laparotomy sponges. A retained patty is a Joint-Commission-reportable event (National Patient Safety Goal NPSG.14).
A brief history of the cottonoid
The nickname "cottonoid" is a century-old artifact of neurosurgical history. In the 1910s and 1920s, Harvey Cushing — often called the father of modern neurosurgery — began using small pledgets of compressed cotton to control bleeding on the exposed cortex at the Peter Bent Brigham Hospital in Boston. Cotton was cheap, absorbent, and gentle enough to lay directly against the brain. Surgeons called them "cotton patties" and then, informally, "cottonoids."
The material changed in the mid-20th century. Cotton fibers, however soft, can shed into the wound and act as a nidus for granuloma formation weeks or months after surgery. Rayon — a regenerated-cellulose fiber invented in France in 1855 and refined for medical use in the 1950s — is essentially non-linting. Once medical rayon became widely available, neurosurgical patties transitioned away from cotton within a decade. By the 1970s virtually all commercially sold neuro patties in the United States were rayon.
The name never updated. Even today, in a modern operating room, a surgeon calling for a "half-by-half cottonoid" is asking for a rayon patty. The American Surgical Company, founded in Salem, Massachusetts, has manufactured neurosurgical patties continuously since 1919 and is one of the oldest continuously operating surgical-sponge manufacturers in the United States. FABCO — a mid-Atlantic manufacturer — has produced neuro patties under its own brand for more than three decades and is the second-most-common brand encountered in U.S. procurement systems.
What are neuro patties made of?
Modern neuro patty sponges are made from medical-grade rayon — a regenerated-cellulose fiber that is soft, highly absorbent, non-linting, and biocompatible with exposed neural tissue. Rayon fibers are extruded, cross-laid into a non-woven web, bonded, calendered flat, cut to size, and packed under cleanroom conditions.
Key material properties every purchasing spec should call out:
Property
Requirement
Base fiber
100% medical-grade rayon (regenerated cellulose)
Latex content
Latex-free — required in every U.S. hospital
Lint / fiber shedding
Effectively zero — critical near exposed CNS tissue
ISO 10993-1 cytotoxicity, sensitization, irritation
Both American Surgical and FABCO meet every one of these criteria. American Surgical publishes its rayon absorbency as 12% higher than the leading competitor and its tensile strength as 2× higher — a claim reflected in its Ray-Cot®product literature.
Why the X-ray detectable line matters
A retained surgical sponge is one of the most-cited "never events" in hospital care. Neuro patties are used in bulk during long cranial and spine cases, packed into deep and narrow spaces, and are the single easiest surgical sponge to lose count of. To mitigate the risk, every U.S.-sold neuro patty embeds a barium sulfate radiopaque lineduring manufacture. On an intraoperative or post-operative film, that line shows as a bright streak — invisible to the naked eye once soaked with blood, but unmistakable on X-ray.
Regulatory / accreditation drivers requiring the barium line:
Joint Commission National Patient Safety Goal NPSG.14 — Prevent unintended retention of foreign objects
AORN Guidelines for Prevention of Retained Surgical Items
AAMI ANSI/AAMI ST79 — where reusable sponge-counting practices are referenced
State-level Never-Event reporting under the CMS Serious Reportable Events list
Full size chart — FABCO ↔ American Surgical Ray-Cot®
The most-ordered neuro patty sizes in U.S. hospitals, with the manufacturer part number for both brands and the typical clinical use for each size. Sizes without a FABCO cross-reference are stocked exclusively as American Surgical Ray-Cot®.
Size (in)
Size (mm)
Ray-Cot® #
FABCO #
Typical use
¼ × ¼ in
6 × 6 mm
60-02
35500010
Cortex protection · micro-hemostasis
¼ × 1½ in
6 × 38 mm
60-16
—
Retraction along a narrow sulcus
¼ × 3 in
6 × 76 mm
60-04
—
Long-tract retraction · cranial base
½ × ½ in
13 × 13 mm
60-06
35501110
Everyday hemostasis · small oozing surface
½ × 1 in
13 × 25 mm
60-07
35501310
Tumor bed hemostasis · sinus surgery
½ × 1½ in
13 × 38 mm
60-08
35501410
Spine dura protection
½ × 2 in
13 × 51 mm
60-29
35501510
Sub-frontal exposure · pediatric craniotomy
½ × 3 in
13 × 76 mm
60-09
35501610
Retraction of temporal lobe · long dura
¾ × ¾ in
19 × 19 mm
60-10
35502210
General hemostasis · cerebellar retraction
1 × 1 in
25 × 25 mm
60-12
35503310
Broad cortical protection
1 × 3 in
25 × 76 mm
60-13
35503610
Large retraction · trauma exposure
1½ × 1½ in
38 × 38 mm
60-14
—
Deep bleeder tamponade
1½ × 3 in
38 × 76 mm
60-22
—
Large-vessel control · flap protection
3 × 3 in
76 × 76 mm
60-15
—
Wound edge protection · packing
Standard packaging for every SKU on this chart: 10 patties per count-verification card · 1 card per sterile pouch · 20 pouches per box (200 patties per box).
Both American Surgical and FABCO ship neuro patties sterile from the manufacturer — hospitals do not sterilize them on-site. The industry-standard package pyramid is identical between the two brands:
10 patties → wound on a count-verification card
1 card → sealed in a sterile peel-open pouch
20 pouches → boxed = 200 patties per box
Sterilization method: American Surgical primarily uses ethylene oxide (EO)per ISO 11135. Certain FABCO SKUs may be gamma-sterilized (ISO 11137) — always confirm the sterilization method for your specific SKU on the manufacturer's certificate of analysis if your facility has an EO-sensitivity policy.
Shelf life is typically five years from the sterilization date printed on the box. Store between 20°–30°C, humidity below 60%, out of direct sunlight. Do not re-sterilize opened patties — they are single-use, and re-processing will destroy the locator-string bond and degrade the barium line.
FABCO vs American Surgical Ray-Cot® — how to choose
Both brands are U.S.-made, latex-free, X-ray detectable, sterile rayon patties in the same 200-per-box format. Clinical performance is essentially interchangeable — the decision is usually driven by surgeon protocol, GPO contract preference, or supplier diversity requirements. Here's the side-by-side:
Attribute
American Surgical Ray-Cot®
FABCO Neuro Patties
Manufacturer
American Surgical Company · Salem, MA (since 1919)
FABCO · U.S. manufacturer
Material
100% rayon, latex-free
100% rayon, latex-free
Radiopaque marker
Single barium sulfate line
Barium sulfate line
Locator string
Yes — securely attached
Yes — securely attached
Absorbency (mfr claim)
12% higher than the leading competitor
Standard rayon absorbency
Tensile strength (mfr claim)
2× stronger than the leading competitor
Standard rayon strength
Packaging
10/card · 20 pouches/box (200/box)
10/card · 20 pouches/box (200/box)
Sterilization
EO (ISO 11135)
EO or Gamma — SKU-dependent
Sterile Mate role
Authorized distributor
Specialty (Off-The-Grid / non-GPO) stock
Best for
Facilities standardizing on the U.S. market leader
Facilities with a specific FABCO contract or surgeon preference
Sterile Mate's recommendation: if you're standardizing a new neurosurgery service or looking for the U.S. market-leader, order Ray-Cot®. If your GPO contract or a specific surgeon requires FABCO, we stock the 9 most-ordered FABCO SKUs and quote them on request. Either line ships from us the same way — same delivery window, same freight-inclusive pricing on 5+ box orders.
How to buy neuro patties without a GPO
Sterile Mate is a non-GPO friendly distributor — you do not need a Vizient, Premier, HealthTrust, or Intalere agreement to buy from us. That matters for three types of buyers:
Ambulatory surgery centers and critical-access hospitals that don't have a full GPO contract
Health systems with a GPO contract that doesn't cover a specific SKU (or is on allocation)
Facilities using certified small-business supplier-diversity spend to hit compliance targets — we're Certified Small Business in Texas and Certified Small Business nationally
Standard terms: Net 30 on credit approval, no minimum order for established accounts, freight-inclusive pricing on 5+ box orders in Texas / Louisiana / Alabama / Mississippi. certified small-business supplier-diversity credit is documented on every invoice.
Frequently asked questions
What is a neuro patty sponge?
A neuro patty sponge — also called a cottonoid, neurosurgical pattie, or brain pattie — is a small, sterile, absorbent rayon square used during neurosurgery, spine, ENT, and ophthalmic procedures. Each patty has an X-ray detectable barium line and a securely attached locator string so it can be identified on a radiograph and retrieved from the surgical field. Neuro patties do two jobs: they protect delicate tissue (cortex, dura, cranial nerves) from surgical instruments, and they absorb blood and irrigation to keep the field visible during microsurgery.
What is a cottonoid?
"Cottonoid" is the surgical-team nickname for a neuro patty. Despite the name, modern neuro patties are made from rayon (not cotton) because rayon sheds virtually no fibers into the wound. The term dates back to the 1920s when early neurosurgeons — including Harvey Cushing at Peter Bent Brigham Hospital — used compressed cotton balls to control bleeding on the cortical surface. The name stuck even after the material changed.
What are neuro patties made of?
Modern neuro patties are made of medical-grade rayon (regenerated cellulose) — chosen because it is soft, highly absorbent, non-linting, and dissolves in aqueous solutions without releasing loose fibers. Every patty includes a radiopaque barium sulfate line (making it visible on X-ray) and a locator string (typically a bright blue polyester monofilament) so the surgical team can find and remove it before closure. All neuro patties sold in the U.S. are latex-free.
Why are neuro patties X-ray detectable?
Because a retained surgical sponge is one of the most-feared preventable events in the operating room. Neuro patties are used in dozens of pieces per case, packed into deep and narrow spaces, and are easy to lose count of during a long procedure. The Joint Commission's National Patient Safety Goal NPSG.14 and AORN standards both require radiopaque markers on all sponges used inside a wound. The barium sulfate line on each patty shows clearly on intraoperative and post-operative films.
What is the difference between FABCO and American Surgical Ray-Cot® neuro patties?
Both are U.S.-made, latex-free, X-ray detectable rayon patties with a locator string, packaged 10 patties per card, 20 pouches per box (200 patties per box). The core clinical performance is essentially interchangeable. The practical differences are: (1) American Surgical (Ray-Cot® / Delicot®) is manufactured in Salem, Massachusetts and marketed as "12% more absorbent, 2× stronger" than the leading competitor; Sterile Mate is an authorized distributor for the full American Surgical line. (2) FABCO neuro patties are sourced through Sterile Mate's specialty (Off-The-Grid / non-GPO) channel — we stock them for hospitals whose surgeons, GPO contract, or purchasing preference specifically calls for FABCO SKUs (35500010, 35501110, 35501310, 35501410, 35501510, 35501610, 35502210, 35503310, 35503610). Either line ships from us the same way; buyers pick whichever their protocol requires.
How are neuro patties sterilized?
Both FABCO and American Surgical neuro patties are sold sterile from the manufacturer. They are packaged 10 patties per count-verification card, sealed inside a peel-open sterile pouch, with 20 pouches per box (200 patties per box). Sterilization is validated by the manufacturer per ISO 11135 (ethylene oxide) or ISO 11137 (gamma) depending on the SKU. Do not re-sterilize opened patties — they are single-use.
How many patty sizes does a typical neurosurgery service need to stock?
Most SPD departments stock 8-12 sizes. The workhorse sizes are ½×½ in, ½×1 in, ½×1½ in, ¾×¾ in, and 1×1 in — these cover roughly 70% of use. Cranial base and skull-base teams add ¼×¼ in and ¼×3 in. Spine and trauma services add the larger 1×3 in, 1½×3 in, and 3×3 in patties. See the size chart on this page for the full range with FABCO and Ray-Cot® cross-references.
Can I buy neuro patties without a GPO contract?
Yes. Sterile Mate is a non-GPO friendly distributor. We serve hospitals, ambulatory surgery centers, and critical-access facilities across Texas, Louisiana, Alabama, and Mississippi with net-30 terms, certified small-business supplier-diversity credit, and no minimum order for existing accounts. Request pricing on either the American Surgical Ray-Cot® line or the FABCO specialty line and we'll return a firm quote within one business day.
What are the standard packaging quantities for neuro patties?
The industry-standard pack is: 10 patties per count-verification card, 1 card per sterile peel-open pouch, and 20 pouches per box — for a total of 200 patties per box. Both FABCO and American Surgical follow this convention. Most hospitals order full boxes; case-cart pull sheets typically call for 1-3 pouches of each size per procedure.
Are neuro patties reusable?
No. Neuro patties are single-use, sterile, disposable devices. Once opened they must be counted, used, and disposed of as biohazardous surgical waste per the facility's protocol. Attempting to re-sterilize or re-use them defeats the count-verification system, degrades the locator string, and risks infection.
Ready to order?
Both lines in stock. Same-day quote turnaround.
Sterile Mate stocks the full American Surgical Ray-Cot® line as an authorized distributor and carries the nine most-ordered FABCO SKUs as a specialty item. Pick your brand and we'll return a firm quote within one business day.
