United States Environmental Protection Agency Risk Reduction Engineering Laboratory Cincinnati, OH 45268 Research and Development EPA/600/S2-91/024 Aug. 1991 &EPA Project Summary Hospital Pollution Prevention Case Study In this study, the U.S. Environmental Protection Agency (EPA) Investigated the disposables used in patient care at the U.S. Department of Veterans Affairs Cincinnati Hospital and the associated Fort Thomas Medical Center (DVA-Cin) to identify future opportunities for mini- mizing solid waste. These facilities al- ready practiced effective waste minimi- zation, particularly in their use of du- rable cloth gowns and drapes. The waste minimization Assessment Team found several additional opportunities to mini- mize waste generation, e.g., using com- mercial reprocessing of Petri dishes rather than disposing of them; reassess- ing the use of surgical sponges and chucks so they are not employed where reusable linens could be substituted. This Project Summary was developed by EPA's Risk Reduction Engineering Laboratory, Cincinnati, OH, to announce key findings of the research project that Is fully documented In a Separate report of the same title (see Project Report ordering Information at back). Introduction The EPA has instituted a broad pollution prevention research program through its Office of Research and Development to support continued environmental improve- ments throughout the nation. The Agency is also responding to the national concern in regards to the generation and disposal of medical wastes. To effectively implement its pollution pre- vention programs, the EPA is also investi- gating how the departments and agencies within the Federal community can help each other reduce "waste generation." As a part of these efforts, EPA's Risk Reduction En- gineering Laboratory (RREL) provides staff and support to conduct waste minimization assessments under the Waste Reduction Evaluations and Assessments at Federal Sites (WREAFS) Program. Under the WREAFS program, the DVA-Cin offered to host an assessment of pollution prevention opportunities at their facilities. This study investigated the use of disposables in pa- tient care in order to identify research op- portunities for future solid waste minimiza- tion. The dramatic rise in hospital and health care costs throughout this decade is com- monly attributed to the cost-plus-fee reim- bursement structure of medical insurance. Under this system, the health care facility is able to pass on direct costs, a portion of overhead costs, and service fees to each patient for eventual reimbursement by an insurance carrier following an established rate scale. Department of Veteran's Affairs' facili- ties, however, are not reimbursed for health care services; each facility operates under a budget fixed by the Department for the fiscal year. Therefore, individual facilities such as DVA-Cin are very sensitive to cost, since achieving cost savings translates into an ability to extend their services. Because an earlier study had previously emphasized the opportunities for hazard- ous waste minimization, RREL and DVA- Cin chose to look for pollution prevention alternatives for minimizing the discarded medical supply wastestream. The DVA-Cin is uniquely suited to such a study because of the cost sensitivity of DVA facilities. The need to deliver services under a fixed bud- get has led DVA-Cin both to adopt and to continue practices that reduce the amount of waste and, hence, reduce possible pollu- tion. For example, the DVA-Cin Medical Center carefully segregates its waste to minimize the volume that will have to be transported by the infectious waste hauler (unit costs for infectious waste disposal far exceed those for general refuse). Also, tak- ing advantage of its access to a DVA-oper- ated laundry in Dayton, Ohio, DVA-Cin still uses durable cloth gowns and drapes (wovens) instead of the disposable paper garments. Hospital staff with work experi- ence in other Cincinnati area hospitals esti- mated that DVA-Cin's consumption of dis- {>_T; Printed on Recycled Paper ------- posable gowns and drapes was the lowest in the metropolitan area. Disposable Waste Profile The majority of waste generated by a hospital consists of disposable products. According to DVA-Cin personnel, approxi- mately 80% of the hospital's supplies are disposed of after a single use. The DVA-Cin saw a change f rom reusables to disposables 10 to 15 years ago and an additional in- crease in the use of disposables in the last 2 to 3 years, because of concern over both patient safety and staff occupational expo- sure to the AIDS virus. Therefore, the in- crease results from greater use of existing disposable supplies (i.e., single-use sponges for patient surgery, and disposable gloves and masks worn to protect hospital staff and prevent cross contamination) rather than from the use of newly developed disposable items. This section profiles the major dispos- able items ordered by these DVA-Cin de- partments: Laboratory Services; Surgery; Surgical Intensive Care Unit (SICU); 5 South (a patientfloor); Medical Intensive Care Unit (MICU); Hemodialysis; and the Outpatient Clinic. Laboratory Services This department performs analyses on specimens taken from patients. In a nine- month period ending June 30, 1989, the laboratory had conducted 41,097 venipunctures, 9,935 bacterial cultures, 4,730 blood cultures, 854 fungal cultures, and 815 tuberculosis cultures. The Labora- tory consists of four laboratory areas: he- matology, clinical chemistry, microbiology, and histopathology. Hematology Laboratory Hematology draws and analyzes blood samples from 50 to 60 patients daily. The technicians visit the patients to draw samples and then return to the laboratory to conduct the analyses. Hematology generates two, 30-gallon bags of infectious waste each day. It is rendered noninfectious via auto- claving and is disposed of as general trash. Sharps (needles, broken glass) are placed in sharps containers, and those containers are collected by housekeeping staff for weekly incineration. Clinical Chemistry Laboratory Clinical chemistry conducts urine and blood serum analyses on samples drawn by the hematology technicians. This Labora- tory area also generates just under two, 30- gallon bags of autoclaved waste each day. The hemotology and clinical chemistry labo- ratories are adjacent and share the same autoclave. Microbiology Laboratory The greatest amount of discarded sup- plies by weight is produced in this Labora- tory area, because most of the wastes are glass products. At least three 30-gallon bags of autoclaved waste are produced each day from this area. Histopathology Laboratory This area is responsible for analyzing tissue specimens and body parts from sur- gery and the morgue. Histopathology pro- duces no more than one, 5-gallon bag of autoclaved waste per day. Pathological wastes are incinerated on-site. Disposable specimen containers containing formalde- hyde are autoclaved and then incinerated on-site. Surgery Department Surgery handles approximately 15 cases daily. Surgery carefully segregates wastes as they are generated. The Surgery Depart- ment generates between one and two, 30- gallon bags of blood and body fluid waste per case, or 15 to 30 bags per day. Approxi- mately 70% of the waste in these bags is estimated to be contaminated paper waste. According to DVA-Cin officials, other Cin- cinnati hospitals are estimated to generate three, 30-gallon bags of waste per case. DVA-Cin maintains its lower, waste-gen- eration rate through the continued use of wovens. The greatest volume of medical supplies requiring disposal after a single use are exam gloves and surgical sponges. Surgi- cal sponges have been reused in the past. However, these are now disposed after a single use, because of concerns over the AIDS virus. Surgery also uses operating room packs that are prepared with all the disposable products necessary for a specific type of operation. The packs are generally used in full, although occasionally specific items may not be used and are wasted. Sharps are placed in sharps containers, which are clear-bagged to prevent leakage and sent to the on-site incinerator. Blood and body fluid is collected by a contract, infectious waste hauler for off-site treat- ment and disposal. All other waste is gen- eral trash. Surgical Intensive Care Unit (SICU) Almost all of SICU's eight beds are occu- pied on a regular basis. Cloth gowns are worn by patients and staff and are laun- dered for reuse. Procedure trays are resterilized on-site and reused. However, SICU staff would like to use disposable packs such as those used in surgery. Waste is segregated into three catego- ries: sharps, blood and body fluids, and general trash. Blood and body fluid waste(s) generated by SICU consists mainly of suc- tion liners and tubes. Foley bags and chest tubes are flushed of their fluids and placed in general trash. Intravenous (I-V) bags go directly into general trash. Sharps are boxed and incinerated on-site. Blood and body fluid wastes are strictly segregated into one to two, 30-gallon bags per day. However, for those patients requir- ing isolation, SICU may generate as many as ten, 5-gallon bags of waste per day for each patient. The number of patients in isolation varies. Five (5) South: Patient Floors Thirty Six (36) beds, of which 29 to 32 are occupied at any given time, are located in Five South. Pre- and post-operative care services, including administration of medi- cations and changing of dressings, are pro- vided in Five South. Cloth gowns are gener- ally worn on patient care floors, although disposable gowns are used whenever cloth is unavailable. Waste is segregated into sharps, blood and body fluids, and general trash. One to two, 30-gallon bags of blood and body fluid waste are generated per day. In practice, nurses often dispose of nonblood and body fluid waste(s) into the blood and body fluid waste container. Medical Intensive Care Unit/ Cardiac Care Unit (MICU/CCU) The MICU/CCU has eight beds, all of which are constantly occupied. MICU/CCU reuses woven gowns and pressure bags. Pressure bags are used to introduce blood to a patient and are cleaned for reuse. Waste is segregated into sharps, blood and body fluids, and general trash. How- ever, the Assessment Team again noticed that the segregation procedures were not always implemented by the staff. For ex- ample, empty disposable urinals were ob- served in the blood and body fluid contain- ers. Hemodialysis This unit has nine treatment stations. Treatment occurs in shifts, and the unit has a capacity to treat 55 patients each week. Treatment takes about 5 hours. Nearly all products are disposable, in- cluding aprons and masks. As is common practice in many hospitals, disposable dia- lyzers are resterilized and reused approxi- mately 20 times before disposal. The prac- tice of reusing disposables in health care is controversial and is discussed further in this report. ------- At least four, 30-gallon bags of bbod and body fluid are generated each day. Most of the disposable items are discarded in the blood and body fluid containers. Sharps are placed in sharps containers, clear-bagged and incinerated. Outpatient Clinic The clinic services approximately 500 patients each day. The services include: surgical procedures; medical exams; chem- otherapy, dermatology; urology; plastic sur- gery ; orthopedics; and ear, nose and throat. Plastic-coated paper gowns are worn for chemotherapy procedures (which are dis- posed of as cytctoxic waste) and often for other outpatient treatment and procedures. Reusable wovens include sheets, pillow cases, towels, and blankets. Badly soiled linens are often discarded rather than laun- dered. Gomco suction apparatus, suture removal sets, and scalpels are all reused. The Outpatient Clinic fills one, 30-gallon bag of blood and body fluid wastes each day. Chemotherapy wastes are packaged in white plastic containers, and eventually transported to final disposal, off-site, by a licensed cytotoxic waste hauler. Sharps are handled as previously indicated for other areas. DVA-CIn Waste Generation Compared With Other Hospitals On average, hospitals generate between 0.5 and 4 Ib of infectious waste per patient each day. The DVA-Cin facility produces approximately 0.6 Ib of infectious waste per patient each day, placing DVA-Cin at the low end of the spectrum. Infectious waste is defined differently in different states. For example, under Ohio regulations, OVA-Cin is able to classify its laboratory wastes as general trash after autoclaving. However, a hospital in New Jersey would continue to list such wastes as infectious, despite the autoclave treatment. If the quantity of infectious wastes at DVA- Cin included laboratory wastes, the genera- tion rate would increase to 0.87 Ib per pa- tient per day — still quite low when com- pared to that at other hospitals. As with other areas, the continued use of wovens at DVA-Cin is probably the primary reason for this lower rate. Pollution Prevention Opportunities at Hospitals In addition to developing the waste pro- files presented above, the Assessment Team identified and evaluated the opportu- nities to minimize waste. This analysis in- cludes discussions of issues affecting deci- sion-making; the benefits/costs of dispos- able versus reusable products; the repro- cessing of disposable items intended for single-use; the factors that combine to pro- mote reliance on disposables; and the abil- ity to implement better operating practices. Choosing Between Disposable and Reusable Products Four major factors support the medical profession's preference for disposables. These are: health and safety; cost; conve- nience; and space constraints. With the advance of technology, intricate devices are mass-produced and sold as single-use items. They are prepackaged and sterilized to relieve the hospitals of quality assurance concerns related to reuse. Thus, labor and reprocessing costs are being replaced by the 'apparently' lower costs of treatment, destruction, or disposal of single-use mate- rials. Packs of disposable goods are cus- tom-fitted, used and discarded, alleviating operating room (OR) prep time and simpli- fying inventory control. An excellent example of how cost and convenience affected decision making can be found in the demise of hospital laundries. Hospital laundries experienced a rising de- mand for all linen products because inpa- tient services increased at the time that disposable products were being introduced. Older laundering operations were unable to process and sterilize the increased load. Acquiring disposable linens ensured an adequate supply of products, relieved an overburdened laundry, and provided cost savings by allowing hospitals to abandon or further downgrade this service, rather than invest in capital improvements. The As- sessment Team forthe DVA-Cin Study sug- gested that the DVA-Cin's use of linens, processed at the Dayton laundry, was a significant factor in explaining DVA-Cin's very low waste generation rate. Reusing Single-Use Devices Hospitals and other health care facilities have attempted to reduce costs by repro- cessing disposable, single-use devices/ products. The most commonly reused dis- posable products are hemodialyzers, car- diovascular catheters, respiratory therapy breathing circuits, biopsy needles, cautery devices, anesthesia breathing circuits, and endotracheal tubes. Although the issue of reusing disposable devices is highly de- bated, health care professionals agree that if a product is to be reused it must be as functional, sterile and safe as when new. In making this decision, health care pro- fessionals must consider the possibility of disease transmission or infection, assump- tion of product liability, reliability, and cost. The less critical an item, the more likely it can be reused. For example, because a bedpan is considered to be a noncrrtical item by the Center for Disease Control (CDC) and the risk of infection is minimal, reuse could be considered. An arterial embolectomy catheter, however, is consid- ered critical, and the potential risks from reuse are great. Hospitals will always choose health and safety over issues of economics or waste neutralization. Factors Affecting Continued Reliance on Disposables Infection control is the primary limiting factor when considering reusable, or 'du- rable', products and/or reuse of disposable products as a means for reducing the rate of waste generation and the associate waste handling costs. The CDC's Universal Pre- cautions state that all blood and body sub- stances must be treated as potentially in- fectious. As the first line of defense against pathogen transmissionsfrom these sources, the medical community employs physical barriers including: gloves, protective cloth- ing, masks and eye protection. Single-use versions of these above items, which are intended for personnel protection, provide hospitals with added assurance against accidental transmissions because they are used once, rendered noninfectious through autoclaving and either hauled off-site as general trash or incinerated on-site. This practice eases the quality control burden for the hospital. Another obstacle to converting back from a single-use to a reuseable product or de- vice is that such products may no longer exist or may be too expensive to employ. The DVA-Cin procurement office indicated that use of disposable products had, in many instances, completely eliminated the market for durable goods. As a result, the durable version is either no longer available or only available through special-order sup- ply companies unable to guarantee long- term availability, unable to provide suffi- ciently large quantities, or both. These con- ditions, in turn, drive up the cost of the durable versions, potentially making them cost-prohibitive. Specific DVA Pollution Prevention Opportunities A wide variety of disposable devices, such as syringes, hemodialyzers, Petri dishes, and bedpans, contribute to thegrow- ing waste streams from DVA health care facilities. To successfully reduce waste, DVA hospitals must reconsider applications of single-use devices/products and evaluate if these disposables are still the most appro- priate option. If a reusable version can pro- vide comparable reliability, sterility, and ------- safety, it would be reasonable to consider reverting to reusable versions. Moreover, when the hospital is reprocessing single- use devices, use of the more durable ver- sion would be even more attractive, be- cause it would have a longer use life and use of the disposable version has not re- lieved the hospital of resterilization require- ments, quality assurance checks, and all associated labor and management costs. Because of the diversity of the areas toured at DVA-Cin, it is appropriate to dis- cuss pollution prevention opportunities by work area. The major waste minimization opportunities for each area are summarized as follows. Laboratory Services Nearly all items used in Laboratory Ser- vices' areas are disposable. Glass products consist of test tubes, sample cups, Petri dishes, slides, pipettes, and pipette tips. Although, in most cases, glass could be reprocessed for reuse, immediate treatment and disposal lessens handling time and decreases the chance of exposure to acci- dents and spills. Plastic products (e.g., pipettes, pipette tips, test tubes, testing items, specimen bags, cuvette rings, etc.) are autoclaved and disposed of after a single use. Of these, only cuvette rings are reused, because of their high unit cost. Since the only good, durable substitutes for plastics are made of glass, and glass is not reprocessed, substi- tution in this case would only increase the weight of the wastestream. One significant exception to the above, however, may be in the Microbiology Labo- ratory, which disposes of 1500 Petri dishes each week. Because the dishes are glass, there is an opportunity to reprocess the dishes and prepare them with new media. Although they are difficult to clean and agar preparation is very labor intensive, use of an off-site reprocessing facility should be con- sidered. Such an alternative would allow the lab to continue functioning, without the disruption of inhouse reprocessing activi- ties, and would significantly decrease the weight and volume of the wastes generated in the laboratory. As there are eight other large hospitals within a two-mile radius of DVA-Cin, recycling of petri dishes would seem to offer a reasonable entrepreneurial opportunity. Surgery DVA-Cin extensively uses woven gowns, drapes, and instrument wraps, throughout the Hospital. Thus, greatest volume and weight of disposables in medical wastef rom surgery consist of surgical sponges and exam gloves. Although waste sponges should continue to be considered poten- tially infectious, it would be worthwhile to investigate, as a waste minimization alter- native, whether sponges are being also used for purposes better suited for absor- bent, reusable towels (i.e., cleanup activi- ties). SICU/MICU/CCU The major disposable products used in this Hospital area are catheters, tubing, suctioning equipment, I-V bags, needles and syringes. Catheters, tubing, and suctioning equipment come into contact with body fluids during use and must be treated as potentially infectious. In accor- dance with Universal Precautions, needles and syringes are destroyed in a medical incinerator. I-V bags, however, never come into contact with body fluids and remain unoontaminated during use. Therefore, plas- tic I-V bottles could be safely reused for a single patient, and should be considered as a substitute for the I-V bags. , Five South: Patient Floors/ Outpatient Clinic The disposable products regularly used on the patient floors include suctioning equip- ment, tubing, catheters, blood transfusion equipment, chucks, and dressing supplies. Because of the inherent contact with blood and body fluids, these products are as- sumed to have a high risk of disease trans- mission. Thus, the only pollution prevention option suggested is in the use of chucks. Chucks act as linen and surface protectors, absorbing blood and body fluids, so that the reusable linens do not become grossly soiled and surfaces will be easier and safer to clean. Chucks are present throughout the hospital; for example, because of their ease of use, chucks are used in the laboratories, as well, to contain small spills at work sta- tions. DVA-Cin, may want to review the use of chucks to determine whether their avail- ability has led to use in situations where they are not needed. Hemodlalysls The major disposable products in this ward are I-V bags, tubing, gloves, and dia- lyzers. With respect to high-tech items, hemodialyzers are believed to be the only devices, studied by the health care profes- sion in sufficient depth, to showthat function is not impaired through reuse. With this technical knowledge as evidence of safety and reliability, hospitals are able to write policies allowing dialyzer reuse as a waste reduction option. At DVA-Cin, the dialyzers are reused approximately twenty times before their dis- posal. The reuse of dialyzers has been found to be a common practice in health care institu- tions. An informal survey on the reuse of disposables, conducted at the 1984 Georgetown University International Con- ference, showed 46% of the respondents reporting the reuse of this item in their institutions. Additional Observations on DVA-Cln's Pollution Prevention Efforts This DVA hospital has already realized many of the waste reduction opportunities arising from product substitution and waste segregation practices. The hospital's stan- dard use of wovens is a significant part of the reason that DVA-Cin's waste genera- tion rates are so low in comparison to indus- try average. For example, the use of wovens in surgery accounts for the fact that DVA- Cin produces 50% to 65% of the waste normally produced during operations in Cin- cinnati area hospitals. There has been some consideration by DVA-Cin on the reprocessing of glassware. The recycling of glassware made from sodalime (e.g..pasteur pipettes) may greatly reduce the volume and weight of a hospital's current wastes. A large percentage of the glassware used in laboratories is, however, made of borosilicate, which cannot be re- cycled with general consumer waste glass. Also, despite the reliability of disinfection from autoclaving, there is a stigma ascribed to medical waste that may restrict or elimi- nate recycling as a pollution prevention option. Community recycling centers should be contacted regarding their policies for accepting waste glass from health care facilities. The Outpatient Clinic uses both woven and plastic-coated paper gowns. For most treatments, the woven gown is a safe, reli- able barrier against infection and should be the primary gown worn by the Outpatient staff. The use of the paper gowns are best limited to those treatments, such as chemo- therapy, that require more stringent infec- tion control and increased personnel pro- tection. Research and Development Opportunities In conducting these studies, RREL also looked for those areas in which research and development may support advancing new alternatives. In learning of the con- cerns, difficulties, and successes of the health care profession, RREL hopes to ex- ------- pand EPA's experience in the medical waste area to provide a solid basis for planning future research. Suggestions for further re- search in the health care industry are pre- sented below. Evaluate Reuse Potential of Single-Use Devices Hemodialyzers are reused because the/ have been closely studied and evaluated to determine that "such reuse neither impairs thef unction nor compromises patient safety." Most other disposable products have not yet been studied in sufficient depth to make reliable determinations of their suitability for reuse. A cooperative effort could be estab- lished between EPA and representatives of the health care community to undertake research that would provide substantive data to either support or reject specific re- use considerations. Research data of these kinds would give health care professionals a firm basis on which to make such deci- sions, as well as the potential to discover cleaner alternatives to some of the dispos- able products being reused. Quality Assurance Manufacturers' disclaimers of warranty after reuse are among some of the more important legal and ethical considerations associated with the reuse of disposables. Although there is agreement that manufac- turers can offer a higher assurance of steril- ity than can an individual health care facility, research conducted by the EPA, in coop- eration with health care professionals, other Federal agencies (such as the Food and Drug Administration), and trade associa- tions, could form the basis for developing a protocol for reuse that would give hospitals standards for operating procedures and in- stitutional policies. Hidden Cost Factors When comparing the relative costs of disposables versus reusables, the unit cost of a disposable often does not represent the full cost of actually using that product. Dis- posal costs are becoming an increasingly important factor, as landfill and incineration regulations become increasingly more strin- gent. Conversely, reusable products also carry storage and handling costs. Analytical studies in conjunction with health care facili- ties, to quantify these costs conducted by EPA, would act as an aid in decision mak- ing. Development of Reprocessing Capacity Two pollution prevention alternatives cited by this paper involved reprocessing ser- vices. Space and labor constraints, coupled with thegeneral availability and convenience of disposables, appear to be the major obstacles to on-site reprocessing of durable materials. As health care cost containment gains increasing importance, reprocessing may become cost effective for some items. The potential for developing a local repro- cessing capability should be explored, par- ticularly where there is high density of medi- cal facilities. Developing a Reusable Market Certain bills in Congress to amend the Resource Conservation and Recovery Act (RCRA) will require that Federal agencies meet certain objectives for use of recyclable products. Together, the EPA and DVA should consider developing procurement guidelines forthe DVA that will stimulate the production and distribution of reusable and recyclable products. Conclusions The waste reduction Assessment Team was impressed by the difficult challenges undertaken by the DVA-Cin hospital profes- sionals to perform their duties of human care while attempting to minimize the effect of those activities on the environment. Fol- low-up discussions indicate that this is a dynamic process for DVA-Cin, as it devel- ops initiatives in training, information shar- ing, and cooperation with other Federal agencies. EPA intends to pursue future cooperation with DVA to seek health care professionals' advice and guidance in planning and imple- menting research programs to respond to the needs of the medical community in the areas of hazardous waste, infectious waste, and other wastestreams. Opportunities to reduce these wastes do exist, and addi- tional opportunities would likely be uncov- ered through research. Research would also provide the data on which to make operational decisions of benefit to health care facilities, better encompassing envi- ronmental considerations. The full report was submitted in partial fulfillment of Contract No. 68-C8-0062 by Science Applications International Corpo- ration under the sponsorship of the U.S. Environmental Protection Agency. ft U.S. GOVERNMENT PRINTING OFFICE: 1992 - 64X-OSO/402I9 ------- ------- ------- This Project Summary was prepared by staff of Science Applications International Corp., McLean, VA 22102. Kenneth R. Stono is the EPA Project Officer (see below). The complete report, entitled 'Hospital Pollution Prevention Case Study," (Order No. PB91-216 440/AS; Cost: $17.00, subject to change) will be available only from: National Technical Information Service 5285 Port Royal Road Springfield, VA 22161 Telephone: 703-487-4650 The EPA Project Officer can be contacted at: Risk Reduction Engineering Laboratory U.S. Environmental Protection Agency Cincinnati, OH 45268 United States Environmental Protection Agency Center for Environmental Research Information Cincinnati, OH 45268 BULK RATE POSTAGE & FEES PAID EPA PERMIT NO. G-35 Official Business Penalty for Private Use $300 EPA/600/S2-91/024 ------- |