Chapter 15. Latex Allergy

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    Chapter 15

    Latex AllergyConcern about latex allergy in the medical community has increased as health carepersonnel have seen an increase in reactions among both patients and themselves.

    Latex is the second most common cause of i ntraoperative anaphylaxis, preceded

    only by muscle relaxants (1).

    Origin of Sensitivity

    Natural latex is obtained from the sap of a rubber tree. During the manufacturing

    process, many chemicals are added to the latex, depending on the design and

    technical requirements of the f inished product. These substances may also be

    allergenic. There may be as many as 240 potential ly allergenic substances in

    processed latex products (2).

    The increased incidence of latex allergy is b elieved to be due both to c hanges in

    the manufacturing processes and increased use of latex-containing products.

    Adoption of uni versal and stan da rd prec auti ons (Chapter 34) has greatly increased

    latex exposure.

    Latex sensit izat ion can occur as a result of contact via the skin or mucous

    membranes, inhalation, ingestion, parenteral injection, or wound inoculation.

    Latex-containing Products

    Latex is ubiquitous in the home, workplace, and health care sett ing but is not

    always obvious. In the operating room suite, i t is found in gloves; tracheal tubes;

    Combitubes; face masks; mask straps; airways; wrappers on trays; laryngoscope

    bulb gaskets; skin temperature monitors; rubber suction catheters; arm boards; bite

    blocks; teeth protectors; breathing tubes; oxygen tubing; reservoir bags; v enti lator

    hoses and bellows; resuscitat ion bags (black or blue, reusable); blood pressure

    cuffs and tubing; stethoscope tubing; intravenous tubing injection ports;

    tourniquets; s yringe plungers; rubber-shod c lamps; intravenous bag and tubing

    ports; medication vial needle ports; tape and other adhesives (e.g., Esmarch

    bandages, adhesive bandages); dental dams; elastic bandages (Ace wraps);

    dressings (e.g., Coban, Moleskin, Micropore); rubber pads; protective sheets;

    drains; electrode pads; rubber aprons; circulat ing f luid warming blankets; s ome cast

    material; goggles; pulmonary artery catheter balloons; epidural catheter adapters;

    intravenous (IV) medication pump cassettes; electrocardiogram (ECG) electrodes

    and pads; f inger cots; ostomy bags; intest inal and stomach tubes; rubber bands;

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    automobile tires; raincoats; computer mouse pads; earphones; household rubber

    gloves; and carpet padding to name but a few (8,13).

    Clinical Signs and SymptomsReactions to latex include a spectrum of non-immune and immune-mediated

    responses. Signs and symptoms may be local or s ystemic and vary widely in

    severity and the time of occurrence. Most adverse reactions to latex occur 30 to 60

    minutes after induction (14 ,15 ). Symptoms can progress quickly from mild to

    severe. In some cases, l i fe-threatening reactions a re the f irst to appear.

    There are three types of reactions to latex: irr i tant contact dermatit is, Type IV

    delayed hypersensit ivity, and Type 1 immediate hypersensit ivity (2,8,16 ).

    I r r i t a n t Con t a c t De rma t i t i s

    This is the most common type of glove-related reaction. I t results from the direct

    act ion of latex and other irr i tant chemicals and consists of i tching, redness, scaling,

    drying, and skin c racking. The rash is usually l imited to the exposed skin area.

    Soaps, mechanical irr i tat ion from sc rubbing, and excessive sweating often

    exacerbate it . While this is not a true allergy, disruption in skin integrity may

    enhance absorption of latex allergens and accelerate the onset of allergic

    reactions.

    Type I V De l ay ed Hy pe r s en s i t i v i t y

    Hypersensit ivity is an immune response that leads to tissue damage. Once

    sensit ized, an individual's exposure to an antigen can cause a reaction. I t may take

    several years for latex sensit ivity to develop. When it does, most develop as a Type

    IV (delayed) reaction.

    A Type IV rea cti on (all erg ic con tac t de rmati t is , de laye d hyp ersens i ti v ity) is a T-

    cellmediated response characterized by a skin rash that appears up to 72 hours

    after init ial contact and may p rogress to oozing skin b listers. Unlike irr i tant contact

    dermatit is, al lergic contact dermatit is often spreads beyond the area of contact with

    the allergen. Flushing, itching, rhinit is, di zziness, sinus s ymptoms, conjunctivit is,

    and eyelid edema may also be present.

    Not all individuals who develop Type IV hypersensit ivity progress to Type I, but

    most individuals with Type I s ensit ivity have previously had Type IV symptoms

    (2,16,17).

    Type I Im m ed i a t e Hyp e r s en s i t i v i t y

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    This is the most severe reaction and may lead to signif icant morbidity and mortality

    (18). Symptoms usually appear short ly after exposure but can occur hours later.

    They run the entire spectrum from mild (skin redness, hives, itching, rhinit is,

    scratchy throat, i tchy or swollen eyes) to more severe (facial edema, faintness,

    nausea, abdominal c ramps, diarrhea, cough, hoarse v oice, chest t ightness) to l i fe

    threatening (laryngeal edema, bronchospasm, anaphylaxis). A survey of

    anaphylaxis during anesthesia showed that cardiovascular symptoms, cutaneous

    symptoms, and bronchospasm were the most common clinical features (19).

    Anaphylax is is an imm ed ia te , severe , li fe -t hr eate ni ng al le rgic re spon se. Th ere are a

    number of reports in the literature of anaphylactic reactions to latex

    (1,2 ,4,7,20,21 ,22 ,23,24 ,25 ,26,27 ,28,29,30,31,32 ,33 ,34).

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    Latex allergy should be high on the l ist of possibil i t ies when anaphylaxis occurs

    during anesthesia and surgery. I t may not be apparent that latex is the causative

    factor. I f medications have been injected in close proximity to the anaphylact ic

    reaction, the anesthesia provider may suspect that medication caused the reaction

    (32). Failure to recognize latex allergy can delay removal of latex-containing

    products and delay effect ive treatment.

    Individuals at Risk

    Identifying patients at high risk for h aving an allergic latex reaction allows

    preventive measures to be targeted (17 ). High-risk groups can be identif ied by

    knowing the risk factors and appropriate questioning. Latex anaphylaxis may be

    decreased by identifying at-r isk patients (19).

    The reported prevalence of latex allergy varies greatly depending on the populat ion

    studied and the methods used to detect sensit izat ion. Anyone with frequent

    exposure to latex-containing materials is at increased risk of developing latex

    allergy. The greater the exposure to latex in a populat ion, the greater the number of

    sensit ized individuals. Extended or massive exposure in and of itself is neither

    necessary nor suff icient to cause sensit izat ion if the person is not genetically

    predisposed (35).

    Children and younger adults are more l ikely to become latex s ensit ive than the

    general population. Some but not all studies have found that women and members

    of non-Caucasian races are more l ikely to have latex alle rgies (17,35 ,36 ,37,38 ).

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    The majority of latex-sensit ive individuals have a history of atopy (predisposit ion to

    mult iple allergic condit ions) or posit ive tests in atopy sc reening

    (2,17,25,27,35,39 ,40 ,41,42 ,43 ). Many have a history of an anaphylactic reaction in

    the past (8,36 ,43). Some studies have found a connection between an al lergy to an

    anesthesia-related agent and latex (43 ,44).

    Many patients with Type I latex allergy have a history of allergy to certain foods,

    including bananas, mangoes, watermelons, avocados, peaches, figs, apples,

    chestnuts, pineapples, kiwi, passion f ruit , apricots, nectarines, papaya, celery,

    peanuts, cherries, strawberries, plums, potatoes, and tomatoes

    (2,5 ,25 ,35,37,45,46). There may be cross sensit ivity between latex and f icus,

    grasses, and ragweed (47). Patients with milk protein allergies may exhibit al lergic

    reactions to latex products containing casein (48).

    Individuals with hand dermatit is who wear latex gloves are at inc reased risk (35 ). A

    history of glove-related symptoms does not reliably indicate latex allergy;

    conversely, absence of symptoms does not rule out sensit izat ion (42 ).

    Many latex-sensit ive individuals report swell ing or itching on the hands or other

    areas after contact with rubber gloves, condoms, diaphragms, toys, or other rubber

    products. Other symptoms include swell ing or i tching at the l ips or mouth from

    blowing up balloons or after dental examinations (2).

    Latex allergy incidence is highest for patients requiring mult iple operations along

    with repetit ive urinary catheterizat ion. This includes patients with myelodysplasia,

    congenital orthopedic defects, and congenital genitourinary tract abnormalit ies

    (49). Spina bifida patients have a particularly high incidence. However, adults with

    spinal cord injuries have a low risk of l atex sensit izat ion (50). Other high risk

    groups include patients who undergo repeated esophageal d ilat ions, patients who

    have frequent vaginal exams (part icularly those going through an in v itro

    fert i l izat ion program) and are examined with a latex-covered ultrasound probe (51),

    and patients undergoing barium enema procedures with a latex balloon t ip (17).

    Other at-r isk patients for latex allergy include those who use gloves in their daily

    act ivit ies: farmers, food-service workers, gardeners, painters, mortuary workers,

    auto technicians, law enforcement personnel, waste removal workers, hairdressers,

    individuals involved in the manufacture of latex products, and those with prior

    reactions to l atex-containing devices.

    Approx im ate ly 70 pe rc en t of ad verse ev ents to latex report ed to the Food and Drug

    Admi ni stra t ion (FDA) in vol ve hea lth care wo rk ers . Withi n the medic al prof es sion ,

    individuals who frequently use disposable gloves, including surgeons; anesthesia

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    providers; operat ing room, postanesthesia care unit (PACU), and emergency room

    personnel; dentists and dental assistants; and laboratory technicians are more

    likely to become latex sensit ive t han other health care workers. Adult

    anesthesiologists change gloves more often than pediatric anesthesiologists and

    have an increased prevalence of latex sensit izat ion (52).

    Diagnosing Latex Allergy

    Latex allergy is diagnosed by his tory and confirmatory tests (53).

    H i s t o r y

    Standard questions to sc reen for latex allergy should be developed. There are

    examples of screening tools for patients in the l i terature that can b e of assistance

    in developing a questionnaire (46 ,54). The history should include the risk factors

    and occupations where latex exposure is common, as discussed previously i n this

    chapter.

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    Con f i rma t o r y T e s t s

    A patie nt wi th a hi story suspiciou s for latex al le rg y ma y be a cand ida te fo r

    confirmatory test ing.

    Immunologic test ing is not foolproof, part icularly in the case of latex, because of

    the numerous dif ferent latex proteins. Testing requires a variety of latex antigens,

    and there can be no c ertainty that a part icular antigen wil l be included in the test

    solut ion (17). Because false negatives can occur, patients with a strong s uspicion

    of latex allergy s hould be managed in a latex-safe environment even if immunologic

    test ing indicates a negative reaction (17 ).

    Skin-prick Test

    The skin-prick test (SPT) is used to detect Type I latex allergy (38 ). A dilute

    solut ion of latex allergen is placed on the skin, and the skin is pricked or scratched.

    A wheal -an d-f lare react io n is considere d positiv e for latex sen si ti v i ty . Th is te st is

    inexpensive and easy to administer and interpret. It offers reasonably good

    sensit ivity and specif icity. Retrospective studies show that p atients with

    intraoperative latex anaphylaxis are almost invariably latex-SPT posit ive (42).

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    Drawbacks to the SPT include absence of an accepted test solut ion (2,5,9,17 ,55).

    The risk of a s ystemic anaphylact ic reaction exists, but it is less than with

    intradermal test ing.

    Intradermal Test

    With intradermal test ing, a small amount of a suspension or allergen is injected into

    the skin. This method is more sensit ive than skin pricking, but the chance of

    anaphylaxis is greater (17,56).

    Patch Test

    The patch test is available for diagnosis of Type IV delayed hypersensit ivity (8,38).

    A sta ndard ize d patc h or a f ra gme nt of the la tex produc t is app lied to the sk in an d

    checked over several days. A posit ive reaction includes i tching, redness, swell ing,

    or blistering where the patch covers the sk in.

    In Vitro Measurement of Antibodies

    In vitro tests are used to measure specif ic antibodies against latex allergens in

    blood samples (57). These tests are expensive, and the clinical signif icance of a

    posit ive serologic test is unclear. Subjects with anti latex antibodies are termed

    latex sensit ive , although many are n ot symptomatic and may never become so.

    Challenge Tests

    Challenge (provocation, use, wear) tests may be used if the results of other tests

    are equivocal or if the person has a clinical history highly consistent with latex

    allergy but results of other tests are negative (5,35 ,58). The potential ly allergic

    person handles, wears, or inhales latex proteins and is observed for reactions.

    However, there may be discrepancies in challenge test results, and no challenge

    method has become broadly accepted by clinicians.

    Preventing Reactions

    Successful prevention of latex reactions requires a f acil i ty-wide s trategy. Healthcare facil i t ies should appoint a mult idisciplinary task force that includes

    representatives from every professional component of the inst itut ion. I t should

    include an allergist or i mmunologist as consultant. I t may be a good idea to have a

    latex-sensit ive employee on the team (9). Among the duties of this task force

    should be glove select ion, a mechanism for report ing latex reactions, formulat ing

    policies and protocols for management of the latex-sensit ive patient, and health

    care worker and educational programs (2 ,59 ,60).

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    Medical products that contain latex wil l need to be identif ied and alternatives

    established before an emergency arises. Manufacturers have made great str ides in

    decreasing latex in a variety of products (57 ). I f i t is not possible to remove a latex

    product, barriers should be placed between the l atex item and the patient.

    Successful prevention of a llergic reactions wil l occur only when inst itut ions adopt

    str ict policies to protect at-r isk patients from unnecessary latex exposure. At-r isk

    children in a latex-containing environment are more l ikely to have an allergic

    reaction than those in an environment where latex-containing articles have been

    removed (3,61 ).

    I t is impossible to totally eliminate latex exposure. The goal is to create a latex-

    safe environment, that is, one in which the presence of latex antigens is minimized.

    The need for education cannot be overemphasized. The majority of latex reactions

    in a c enter with an established protocol were attr ibuted to human error (61).

    Using powderless gloves should be a high priority (5 ,62 ,63 ). I t helps to minimize

    reactions to latex at l i t t le added expense and decreases the amount of

    aeroallergens i n the working environment. Oil-based hand creams or lot ions should

    be avoided. They can break down latex and make the protein more l ikely to st ick to

    the hands. When gloves are powdered, pull ing them on and off gently wil l minimize

    aerosolizing the latex proteins.

    Patients with known or suspected latex allergy should have their records f lagged

    and wear l atex-allergy wristbands. Drug prophylaxis is sometimes undertaken (56 ).

    Allerg ic re ac tio ns , inc lu ding anaphylax is, ma y occur even when prophylac tic agents

    are used (3,64 ). While having these drugs already on board may lessen the

    P.435

    severity of a reaction, they may mask the early signs of anaphylaxis, delaying

    recognition and implementation of more aggressive treatment (17 ). Using H2

    blockers may increase the risk of heart block for patients who develop anaphylaxis

    (65).

    I f pat ients requiring surgery have confirmed latex s ensit ivity or convincing histories

    of latex reactions, avoiding latex-containing products is the only effect ive therapy.

    This is not always easy, as latex allergens permeate the hospital. Even in the

    absence of known latex allergy, some procedures involving patients with syndromes

    such as spina bif ida should be performed in a latex-safe area (66 ). For high-risk

    patient groups, avoiding latex products should begin at birth (67 ).

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    The FDA requires that all medical products that contain latex that may direct ly or

    indirect ly come into contact with the body during use to bear labels stat ing that the

    product contains latex and that latex may cause allergic reactions in some

    individuals (68) (Fig. 15.1). Governmental agencies in many other countries have

    similar requirements (68). I f a product does not have this warning, it is l ikely that

    the product is latex-free unless it is a pharmaceutical or is not regulated by the

    FDA. Drug manufacturers are exempt from the labeling requirement ( 69).

    Manufacturers frequently label devices as latex-free (Fig. 15.2).

    The term hypoallergenicis no longer used for devices that contain latex. At

    present, there is no test that can adequately determine the level of latex proteins in

    a product, and there is no manufacturing process that can reduce the level below

    the minimum required to produce a reaction in some people. Also, the total protein

    content is not analogous to allergic r isk.

    The latex-sensit ive patient should be scheduled as the f irst case of the day with al l

    latex-containing materials removed the preceding night to minimize exposure to

    airborne latex-laden part icles (2). No one should enter that operating room with

    latex gloves without scrubbing after taking off latex gloves or while wearing clothing

    from previous latex exposure.

    View Figure

    Figure 15.1Thermodilution catheter clearly marked ascontaining latex.

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    Signs saying Latex Allergy or Latex Alert (fo r patients with signif icant r isk

    factors for latex allergy but no overt signs or sy mptoms) should be posted inside

    and outside the operating room as well as in perioperat ive care areas (Fig. 15.3).

    View Figure

    Figure 15.2Device labeled latex-free.

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    View Figure

    Figure 15.3A sign indicating possible latex allergy shouldbe placed outside the operating room door.

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    Latex products should be l imited to situat ions where it is thought that they are

    superior to nonlatex-containing products. Latex-free gloves with improved f it and

    feel are available (70).

    A ki t/ cart conta ini ng late x-free produc ts shou ld ac comp an y the pa tien t throughou t

    his or her stay. Latex precaution st ickers should be placed on doctors' order sheets

    and the l ike. Signs stat ing Latex Precautions or Latex Allergy should be placed

    on the walls and doors of the patient's room. Any department that is to receive a

    patient with latex allergy or sensit ivity should be notif ied prior to transfer to that

    department.

    Perioperat ive care areas where mult iple patients are managed in proximity (e.g.,

    preoperative holding areas and PACUs) should be re-evaluated. If powdered gloves

    are used in these areas, patients may be admitted directly to the operating room

    and remain there during their recovery from anesthesia. If PACUs have isolation

    rooms, they may be converted to latex-safe environments f or patients recovering

    from surgery (71).

    Some health care facil i t ies have established a specif ic operat ing room where all

    latex-containing materials are banned. Signs should be posted on all entrances to

    that operat ing room, reminding medical personnel of the s ituat ion (72 ). Traff ic in

    the room should be kept to a minimum (2).

    No latex-containing items (i.e., gowns, hats, boots, and compression stockings)

    should be placed on the patient. Cords and tubes for al l monitoring devices should

    be placed in stockinettes and secured with non-latex tape (73).

    Latex-free intravenous s tart kits containing tourniquet, bandages, dressings, tapes,

    and gloves are available. Intravenous tubing without latex inject ion ports should be

    used or all latex inject ion ports should be taped to p revent inadvertent puncture.

    Stopcocks or one-way valves should be used for push and piggyback medications.

    Intravenous f luid or commercially prepared medication bags should be pierced

    through the intravenous tubing port, not the latex injection port.

    Al though reac tions to rub ber syri ng e pl un gers hav e bee n repo rt ed, no pro ble ms

    have so far been described in medications freshly drawn and immediately

    administered (74 ). I f latex-containing syringes are used, drugs should be freshly

    prepared in the syringe immediately before use. Glass syringes offer an attract ive

    alternative, and totally plast ic syringes and special needles are available

    (75,76,77). I t is best to use medication from glass ampules, if available. Although it

    has been advocated that the contents o f a vial should be drawn up after the rubber

    stopper has been removed (17,47 ,78 ), this may not be beneficial and may result in

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    increased microbial contamination and waste (79). Lyophil ized drugs in containers

    with latex should be reconstituted by using a s yringe, not shaken in a mult idose vial

    and withdrawn by using a f i l ter. Vials should be kept upright and not shaken (4).

    A f i l te r shou ld be us ed at the bre ath in g sys te m pa t ie nt port to pro tec t agains t

    airborne latex allergens (80,81).

    I t may not be possible to entirely avoid some rubber-containing anesthetic

    equipment-rubber bellows, diaphragms, valves, and tubings (82 ). However, when

    these parts of equipment do not come into contact with the patient and have been

    previously washed, no complicat ions have resulted (83 ).

    Latex-free equipment including face masks, airways, mask straps, tracheal tubes,

    bag-valve-mask units, reservoir bags, ECG electrodes and pads, s tethoscopes

    (tubing or diaphragm), pulse oximetry sensors, esophageal stethoscopes,

    nasogastric and suction tubes, tape, gas hoses, and breathing tubes should be

    used. Unfortunately, some latex-free reservoir bags have such poor distensibil i ty

    that their use may compromise patient safety (84).

    I f an epidural catheter adaptor contains latex, it should be replaced with a blunt,

    latex-free adaptor.

    Latex-free reusable blood pressure instruments and accessories are available in a

    variety of sizes and models. These include inf lat ing tubing, coiled tubing,

    sphygmomanometers, and inflation bladders. Wrapping the area under the cuff with

    soft cotton can prevent contact with any l atex in these devices.

    In some cases, some improvising may be necessary, as with a pulmonary artery

    catheter (85 ,86).

    From the surgical point of v iew, using non-latex gloves, drains, and catheters is

    mandatory. Special precautions should be undertaken to avoid latex-based

    equipment such as i nstrument mats, rubber-shod clamps, vascular tags, bulb

    syringes, rubber bands, and adhesive bandages. A non-latex glove can be used as

    a

    P.437

    Penrose drain, which can be a sou rce of latex hypersensit ivity (86A).

    When latex-sensit ive patients or staff have been identif ied, it is i mportant to

    provide latex-free items. These should be collected into a cart that can be called

    into act ion as the need arises. The American Society of Anesthesiologists and

    others have made recommendations for t he contents of a latex-safe cart (2,59,86).

    Suggested items are listed in Table 15.1. Each item should give information on

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    latex content and should be reviewed for this information prior to adding the item to

    the latex-safe cart or before use.

    TABLE 15.1 Suggested Contents of a Latex-safe Cart

    Latex-free or glass syringesSyringe needlesIntravenous cathetersIntravenous tubing and extensions made from polyvinylchlorideStopcocks (in-line, three-way, and single)Latex-free heparin lock caps and T-pieces with side portAlcohol wipes in a new boxLatex-safe adhesive tape from a new box

    Latex-free intravenous tourniquetsSterile gauze padsEsophageal thermometer

    Disposable blood pressure cuffs of various sizesIsolation stethoscope

    Sterile case paddingLatex-free disposable pulse oximetry finger sensors

    Latex-free ECG electrodesLatex-free resuscitation bags sized for infants, children, and adults

    Nasal oxygen cannulaOxygen extension tubing

    Latex-free tracheal tubes, double-lumen tubes, and styletsLatex-free oral and nasal airways

    Silicone supraglottic devicePlastic face masks and head straps (elastic strap may have latex)Medications for cardiac arrest and emergency situationsVinyl gloves for any size staffSterile nonlatex gloves, sizes 6 to 9Silicone urinary catheter in assorted sizesUrimeterEpidural and spinal traysPolyvinylchloride suction catheters, sizes 8 to 14 French

    Anesthesia breathing circuits without latex componentsAnesthesia medications in vialsIn-line high efficiency particulate gas filterPolicy binder with all latex policies and protocolsReference guide for latex-containing materialsBrightly colored signs that warn of latex allergy

    Treating Latex Reactions

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    Heal t h Ca r e In s t i t u t i o n Respo ns i b i l i t i e s

    Institutions should provide education programs and training materials about latex

    allergy (71). This includes educating all staff members, not just p rofessional health

    care providers. For example, environmental and nutrit ional service workers are

    required to wear gloves; therefore, they should be knowledgeable about their glove

    choices.

    Staff should be encouraged to report al lergic symptoms and be periodically

    screened for la tex-allergy symptoms. Detect ing symptoms early and protect ing

    symptomatic workers from latex exposure are essential for preventing long-term

    health effects. Prevention strategies should be re-evaluated whenever a worker is

    diagnosed with latex allergy. Studies have s hown that economically feasible

    interventions to reduce latex exposure can s uccessfully allow latex-allergic

    individuals to continue working as well as decrease the number of new cases of

    occupational latex allergy (5).

    The use of powderless gloves (Fig. 15.4) should be encouraged. In a s tudy in which

    health care workers used both powdered and powder-free gloves, the rate of

    conversion to latex sensit ivity was the same i n each group, but the c onverters using

    powdered gloves were s ymptomatic whereas the ones using powderless gloves

    showed no symptoms (92 ).

    Using non-latex gloves for act ivit ies that are not l ikely to involve contact with

    infectious materials (food handling, housekeeping, transport) should be

    encouraged. This can greatly reduce the levels of latex antigens in the

    environment.

    Wearing non-latex gloves or using some type of barrier between the latex gloves

    and the skin should be encouraged. Non-latex gloves are usually more expensive

    than gloves containing latex (97 ). I t is l ikely, however, that the price dif ferential can

    be decreased if the facil i ty were to choose a single vendor of latex-free gloves. I f a

    worker must move to another job to avoid latex-containing materials and the new

    job pa ys les s, tha t wo rk er ma y be eligibl e fo r workers' compens ati on . It is also

    possible that workers could become so sensit ized that employment is not possible.

    Very low levels of permanent disabil i ty are needed to make the conversion to l atex-

    free gloves cost effect ive (97).

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    View Figure

    Figure 15.4Gloves that are both powderless and latex-freewill help to prevent latex allergy.

    Facilit ies should ensure that good housekeeping practices are performed to remove

    latex-containing dust from the workplace. This can be accomplished by identifying

    areas that a re contaminated with latex dust (carpets, upholstery, and venti lat ion

    ducts) for frequent cleaning and changing venti lat ion f i l ters and vacuum bags

    frequently.

    Some health care institutions require that balloons that often accompany flower

    arrangements be non-latex (98 ).

    For sensit ized health care workers, the Americans with Disabil i t ies Act guarantees

    workers reasonable modification of the workplace to accommodate the disability.

    The Occupational Safety and Health Administrat ion (OSHA) rules state that in

    addit ion to gloves that are normally provided, non-latex g loves, glove l iners,

    powderless gloves, or other similar alternatives shall be readily accessible to those

    employees who are allergic to l atex gloves (9).

    Heal t h Ca r e Wo r ke r Respo ns i b i l i t i es

    Workers in health care need to take advantage of latex allergy education and

    training to become famil iar with ways to prevent l atex allergy and to learn to

    recognize the s ymptoms.

    Workers should protect themselves from latex exposure inside and outside the

    workplace. Non-latex gloves should be used for act ivit ies that are not l ikely to

    involve contact with infect ious materials. Intact skin is an effect ive barrier, and it is

    important to maintain good hand care. Cuts and open sores should be covered with

    a plast ic barrier dressing prior to wearing latex gloves (99). Oil-based hand creams

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    or lot ions should be av oided, as they may enhance the release of latex proteins

    from the gloves (54). After removing latex gloves, hands should be washed with a

    mild soap and dried thoroughly. This wil l decrease the load of allergen.

    Health care workers should avoid wearing work clothes (scrubs) home after working

    in the operating room (99). Indirect exposures have caused latex allergy in children

    and spouses.

    If signs and s ymptoms of latex al lergy develop, the person should avoid contact

    with latex-containing products unti l he or she can be seen by a physician who is

    experienced in diagnosing and treating latex allergy. A diary of symptoms should be

    kept. Delay and

    P.439

    self-treatment can delay diagnosis, allowing the problem to become more serious.

    The Hea l t h Ca r e Wo r ke r w i t h L a t e x Sens i t i v i t y

    Depending on the severity of the reaction, latex sensit ivity in health care workers

    can be an inconvenience or a l i fe-threatening hazard. I t can mean the end of a

    career (100,101 ). Often, health care personnel are unaware of their sensit izat ion,

    as the s ymptoms can be nonspecif ic (99 ). The only clue might be the temporal

    relat ionship with working. Denial can be a problem.

    Latex-allergic anesthesia providers should be counseled on the risks of continued

    work in envi ronments with high latex use and on strategies to l imit exposure. They

    should have proper allergy identif icat ion, including a medical alert device, and

    should inform their health care providers ( including dentist and local hospital). They

    may want to carry an allergy kit , including an epinephrine auto-injector device, non-

    latex gloves to wear or give to others to wear if they must care for them, and a

    complete l ist of medications taken. Friends and family should be given information

    about latex allergy. The individual must be on the lookout for hidden latex.

    Considerat ion should be giv en to avoiding foods that may contain proteins similar

    to those in latex.

    Once latex allergy is diagnosed, the only option is to av oid contact with latex and to

    try to c ontrol the symptoms. Almost all the products that health care workers

    encounter in their daily work can b e made latex-free. A latex-safe environment also

    prevents exposure of other workers.

    There are many non-latex gloves available, both steri le and nonsteri le. These

    include vinyl, nitr i le, styrene butadiene, and neoprene (2,53 ,97 ,102). Unfortunately,

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    these may not match the physical characterist ics of la tex gloves such as high

    elast icity, strength, f lexibil i ty, tear resistance, tact i le sensation, and barrier

    integrity (5,53 ,10 3). Latex gloves are biodegradable and do not produce hazardous

    and toxic emissions when incinerated, as do synthetic gloves. Non-latex glove

    liners and latex gloves with integral non-latex layers are available (9). Co -workers

    should wear powderless, low-latex allergen gloves. This reduces the exposure to

    latex by those who are not yet sensit ized and may decrease symptoms in sensit ized

    patients (2,10 ,12 ,16 ,96,10 4,105).

    Health care workers with latex sensit ivity are not at increased risk when

    incidentally exposed to dry, molded, or extruded rubber products in the health care

    environment; however, i f direct contact with such objects is routine, exposure

    should be minimized by covering the object or exposed body part (5).

    Because of the many factors that disseminate latex allergens and because latex

    allergens are so prevalent in some areas, it may not be possible to completely

    isolate workers from these allergens. In this case, job reassignment may be

    necessary. In the severely allergic worker, i t may not be possible to f ind an area in

    the health care facil i ty that wil l be safe.

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    [Medline Link]

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    P.441

    QuestionsFor the following questions, answer

    i f A, B, and C are correct

    i f A and C a re correct

    i f B and D a re correct

    is D is correct

    i f A, B, C, and D are correct.

    1. What factors contribute to the increasing incidence of latex allergy?

    A. Inc re as ed le ngth of surgi cal procedu res

    B. Changes in the manufacturing process

    C. Younger people entering the health care industry

    D. Increased use of latex products because of univ ersal precautions

    View Answer2. Which are likely routes of sensitization to latex?

    A. Sk in contac t

    B. Inhalat ion

    C. Ingestion

    D. Parenteral inject ion

    View Answer3. Which item(s) listed below is unlikely to cause latex

    allergy?

    A. Whe elc hai r t ires

    B. Washed venti lator bellows

    C. Syringe plungers

    D. Products steri l ized with ethylene oxide

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    View Answer4. Powdered gloves pose a greater threat than those without

    powder because

    A. Latex pro tei ns bind to the po wd er

    B. The powder contains all ergens

    C. Powder may spray into the operating room when they are donned or removed

    D. Filters in the venti lat ion system may become clogged

    View Answer5. What are the symptoms of irritant contact dermatitis?

    A. Sk in crac king

    B. I tching

    C. Scaling

    D. Dryness

    View Answer6. What are the characteristics of Type IV hypersensitivity?

    A. De la yed hyp ers ens i t iv ity

    B. Always stays within the area of the antigen

    C. May be associated with d izziness

    D. Skin rash is s een within 5 hours

    View Answer7. Characteristics of Type I hypersensitivity include

    A. Re ac tio ns ma y le ad to mo rta li ty o r mo rb id i ty

    B. Symptoms can occur days later

    C. Reactions range from mild to severe

    D. They are mediated by IgF antibodies

    View Answer8. Primary clinical features of Type I hypersensitivity

    include

    A. Bronc hospasm

    B. Cutaneous s ymptoms

    C. Cardiovascular s ymptoms

    D. Neurologic sy mptoms

    View Answer9. What are the important points to look for when taking a

    history in an attempt to determine the presence of latex allergy?

    A. Ha nd de rmati t is in conj un c ti on wi th weari ng late x g lo ves

    B. Sensit ivity to ragweed

    C. Food allergy to watermelons, pineapples, strawberries, and t omatoes

    D. Predisposit ion to mult iple allergic c ondit ions

    View Answer10. Which conditions are associated with a high incidence of

    latex a llergy?

    A. Genitourina ry tract abn orma l it ie s

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    B. Congenital orthopedic defects

    C. Esophageal str ictures

    D. Spinal cord injuryView Answer11. Important features of the SPT include

    A. High inc ide nce of an ap hylaxis

    B. Reasonably good sensit ivity and specif icity

    C. Availabil i ty of a good test solut ion

    D. Patients with anaphylaxis during s urgery are almost invariably skin-prick posit ive

    View Answer12. Preventive measures for latex allergy include

    A. De termin in g th e products tha t con tain la tex

    B. Using oil-based hand creams or lot ions

    C. Using powderless gloves

    D. Totally eliminating latex exposure

    View Answer13. Considerations for drug prophylaxis include

    A. H2 blockers may increase the risk f or patients with heart block

    B. I t may mask the signs of anaphylaxis

    C. I t may delay implementat ion of treatment, i f anaphylaxis occurs

    D. I t wil l prevent anaphylaxis

    View Answer14. Regarding labeling for latex content,

    A. I f the la bel do es no t indic ate th at i t conta ins latex, it is latexf ree

    B. Products not regulated by the FDA must be labeled if they contain latex

    C. Drug manufacturers must label products regarding latex

    D. The FDA requires that all medical products that may d irect ly or indirect ly contact

    the body be labeled if they contain latex

    View Answer15. Surgical precautions that need to be taken if a patient is

    known to be latex sensitive include

    A. No on e shou ld ente r the opera ting ro om we ari ng late x gl ov es

    B. The case should be posted for the f irst case of the day

    C. Clothes that have not been exposed to latex should be worn

    D. Latex alert signs s hould be posted inside and outside the room

    View Answer16. Which steps can be taken to limit the likelihood of latex

    allergy resulting from intravenous or parenteral injec-tions?

    A. Us ing medic ati on s supp li ed in ampules

    B. Using glass s yringes

    C. Preparing drugs just before use

    D. Using rubber syringe plungers

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    17. Methods to treat irritant contact dermatitis include

    A. Re duce ex pos ure to the irr i tan t

    B. Use of a plast ic glove l iner

    C. Topical c ort icosteroids

    D. Protect ive hand cream

    View Answer18. Steps that health care workers can take to protect

    themselves against latex exposure include

    A. Was hing hand s afte r latex glov es are remov ed

    B. Using n on-latex gloves where infect ious material wil l not be encountered

    C. Covering breaks in the skin with a plast ic barrier

    D. Using oil-based creams or lot ions

    View Answer