JUSTICE ERICKSON delivered the Opinion of the Court.

The petitioner, Belle Bonfils Memorial Blood Center, pursuant to C.A.R. 21, filed a petition to obtain a rule to show cause why the identities of volunteer blood donors, whose blood was transfused the respondent, K.W., should not be held confidential and privileged from discovery. We issued a rule to show cause and now make the rule absolute in part and discharge the rule in part.

I.

On February 28, 1985, K.W. gave birth to a son, R.W., at Mercy Medical Center in Denver. On March 22, 1985, K.W. was readmitted to the hospital for a postpartum hemorrhage. An emergency hysterectomy was performed, and in the course of her treatment, K.W. received four units of whole blood and two units of packed red blood cells supplied by Belle Bonfils Memorial Blood Center (Belle Bonfils). One of the six units of blood K.W. received was contaminated with the AIDS virus. K.W. and her husband, C.W., filed suit against Belle Bonfils for negligent screening of the contaminated donor and negligent testing of the blood. K.W. and C.W. allege that Belle Bonfils was negligent in screening donors and testing donated blood. K.W. and C.W. contend that when the laboratory test became available to indicate the presence of the AIDS virus, Belle Bonfils should have applied the test promptly. They further argue that when profiles of the high risk groups developed, Belle Bonfils should have specifically screened each donor as to the high risk profiles.

In April 1986, the donor of unit No. 4989MB, which had been received by K.W. on March 22, 1985, returned to Belle Bonfils to donate blood. The donor's blood was tested for antibodies to the HIV virus, with a positive result. Belle Bonfils notified the hospitals which had received prior donations from the donor, and advised the hospitals to notify the physicians of the patients who had received the donor's blood so that the patients could be tested. As a result of these notifications, K.W. was tested for the HIV virus in August 1986. K.W. tested positive and filed this action against Belle Bonfils.

Respondents sought disclosure of the identities of each of the six donors whose blood she used, and production of all of the donors' records. Belle Bonfils objected to the requests for discovery, but by agreement provided copies of the front and back of each of the donor cards for the six units of blood received by K.W. Identifying information, consisting of name, address, business and home phone numbers, birthdate, social security number, "recognition," and signature, was deleted from the produced cards. None of the medical history or health examination information was deleted from the cards. Respondents also requested the donor cards relating to all prior donations of the one donor who subsequently tested positive for HIV antibodies. Those donor record cards were produced in a similar manner, with identifying information deleted. Only the infected donor's donor card is in the record that is before us.

Respondents subsequently filed a motion to compel discovery of the donors' identities and the complete donor record cards. On December 1, 1987, the trial court ordered Belle Bonfils to produce for K.W. and C.W. the unmasked donor card of the HIV-positive donor. The court's order expressly allowed the respondents to contact the donor and to attempt to determine his medical history. The trial court also ordered respondents' attorney to keep the information strictly confidential, in the absence of a written order of the court. Disclosure of unmasked donor records of the other five donors was denied, but the trial court did not foreclose the possibility that such further discovery might be permitted at a later time.

II.

Before any information on AIDS was available in the medical community, Belle Bonfils utilized a screening and testing procedure on all potential donors. The purpose of the screening and testing procedure was to avoid accepting undesirable blood, and to protect the donor from injury in the process of giving blood. Donors were excluded on the basis of medical history, such as exposure to hepatitis or syphilis. Other grounds for either temporary or permanent deferment included a history of blood disease, tuberculosis, malaria, cancer, heart problems, epilepsy, unexplained weight loss, or the taking of certain medications.

As of July 1982, Belle Bonfils donor screening criteria avoided accepting blood from some individuals at risk for AIDS. Belle Bonfils representatives attended a meeting in November 1982, of the American Association of Blood Banks and a meeting in December 1982, of the American Society of Hemotology. At both meetings, Belle Bonfils heard reports regarding an infant who acquired AIDS as a result of a tainted transfusion.

In late December 1982, Dr. Robert G. Chapman, the Director of Belle Bonfils, met with a member of Denver's Disease Control Services, and a representative of the Gay and Lesbian Community Center of Colorado. The purpose of the meeting was to discuss the best way to inform the gay community that male homosexuals should no longer donate blood. The Gay and Lesbian Community Center agreed to advise gay males not to donate blood. Belle Bonfils claims that it experienced "good cooperation" with the self-screening program.

In February or March, 1983, Belle Bonfils, in addition to its existing donor medical history interviewing procedure, implemented specific questioning of blood donors concerning the risks and symptoms of AIDS. The new screening procedures included informing donors about the risk factors for AIDS and the general symptoms of the illness. Donors were asked whether they had any symptoms of the disease, and if they were associated with any of the groups at risk, such as intravenous drug users or male homosexuals. Belle Bonfils admits that persons who answered any of these questions affirmatively were not to be accepted as blood donors.

Belle Bonfils revised its "Guidelines for Conducting a Blood Donor Medical History Interview" (guidelines) in December 1983. The guidelines set forth a twofold purpose: first, to insure that the donor could safely tolerate the removal of one pint of blood, and second, to avoid the possibility that the donated blood could transmit an infection to the recipient. The standards for determining when a potential donor should be deferred are set out in a Belle Bonfils directive to its donor technicians. Under a category entitled "Miscellaneous Deferments," the instructions provide: "AIDS — (acquired immune deficiency syndrome) — any donor with close exposure to persons with AIDS should be indefinitely deferred. Groups at highest risk are I.V. drug users, Haitian immigrants, homosexual males with multiple sexual contacts, and hemophilic patients with large numbers of transfusions." At the time the donor whose blood infected K.W. gave his donation in March 1985, each donor was asked to read an AIDS information sheet. The information sheet defined AIDS and listed the groups of society that are at risk. The instructions also state:

"Because of this suggestion (that of carrying the AIDS virus), your blood bank is asking that you voluntarily refrain from donating blood at this time if you are in any of the groups listed above. Although the majority of members of these groups are not carriers, there is presently no good way to detect carriers and thus no means to identify those few who may be at risk."

The HIV virus was first identified in late 1983 or early 1984. In the fall of 1984, a laboratory began to presell test-kits for the AIDS virus to blood bank. The laboratory developed a commercially feasible test, known as the ELISA test. These kits were first licensed by the FDA on March 2, 1985. Belle Bonfils received its first shipment of the test kits on March 13, 1985. The blood donation that infected K.W. was given on the same day. After this action was commenced, Belle Bonfils asserted that the ELISA test was not available to test K.W.'s blood because the Bonfils' staff was being trained on the test procedures from March 13, 1985 to March 31, 1985. ELISA testing of all blood donations did not begin until April 1, 1985.

Thus, as of March 13, 1985, when the infected donor's blood was transfused, a four-part screening and testing process was employed by Bonfils. Potential donors were given the AIDS information sheet describing the risks of donating HIV positive blood. The donors were then asked thirty yes/no questions listed on the donor card, which were directed to their specific medical history. The responses on the card were then reviewed by a Belle Bonfils technician, who had been instructed to follow the guidelines in making the decision whether to accept blood from the potential donor. Thereafter, the donated blood was tested for hepatitis B, syphilis, and various antibodies, not including HIV. Belle Bonfils did not routinely screen for AIDS until approximately two weeks following the receipt of the blood that infected K.W.

III.

One basic issue is presented by the plaintiffs' complaint: whether Bonfils was negligent in screening and testing its blood donors. In order to prosecute their negligence claims, respondents are endeavoring to discover whether Bonfils followed its own screening procedures before it accepted blood from the infected donor. Discovery of the circumstances which resulted in the infected blood being given to Belle Bonfils can be made from only two sources. One source is the Belle Bonfils technician who interviewed the donor and the other is the donor.

The respondents assert that Bonfils failed to follow its established screening and testing procedures before accepting blood from the donor whose infected blood was transfused to K.W. As stated by Bonfils, a significant aspect of its screening process used at the time of the transfusion was a questionnaire given to potential donors. The donor's medical history was determined solely from the thirty yes/no questions on the Belle Bonfils donor card. The questions were designed to determine the donor's fitness to donate blood. According to Bonfils' written guidelines, an unsatisfactory answer to any one of the thirty questions was grounds for temporarily or permanently refusing blood from a potential donor. In order to determine whether the deferment should be temporary or permanent, a Bonfils technician was required to go beyond the yes/no questions and specifically ask the donor about the unsatisfactory responses. Then, depending on the donor's explanation and the guideline's instructions, the donor was either accepted, or temporarily or permanently deferred.

The card of the donor of the AIDS-infected blood indicates that four of the thirty key questions for deferral were unsatisfactorily answered. Specifically, the donor's answers indicated that: (1) he had had recent medications, vaccinations, or injections; (2) he had been previously deferred as a donor; (3) he had been out of the United States within the past three years; and (4) he had had venereal disease in the past. "O.K." was manually inscribed over each of these four responses, presumably by the Bonfils technician.

At the top of the donor's card were the handwritten words "lopresser," "ghonnorea [sic]," "B/P," "Germ, Copenhagen Denmark." Presumably, these words were written by the technician and were the technician's explanations of the four unsatisfactory answers on the donor card. Read in conjunction with these answers, a profile of the donor becomes apparent. He had taken the drug "lopresser" within two weeks of his visit to Bonfils. He had been deferred previously as a donor because he suffered from high blood pressure. Germany and Copenhagen, Denmark were the foreign countries he had been to within three years. At some point, he had had gonorrhea.

The issue for us to resolve here is simple. Is the donor's card by itself sufficient to determine whether the Bonfils' technician followed Bonfils' established guidelines in allowing the donor to donate what turned out to be AIDS-infected blood? Because the donor cards fail to reveal anything about the guidelines or whether the guidelines were followed by the technician, we conclude the donor's card, without additional discovery, is insufficient to meet the minimum requirements of C.R.C.P. 26(b).

C.R.C.P. 26(b)(1) provides, in pertinent part: "Parties may obtain discovery regarding any matter, not privileged, which is relevant to the subject matter involved in the pending action. . . . It is not ground for objection that the information sought will be inadmissible at the trial if the information sought appears reasonably calculated to lead to the discovery of admissible evidence." Thus, one issue is whether the information sought is privileged and, if not privileged, whether the information sought appears reasonably calculated to lead to the discovery of admissible evidence. Dolan v. Mitchell, 179 Colo. 359, 502 P.2d 72 (1972); Lucas v. District Court, 140 Colo. 510, 345 P.2d 1064 (1959). An analysis of the record demonstrates the need for discovery of more than the donor's card if the information sought is not privileged.

A.

The Bonfils' guidelines contained in the record reflect that, if a potential donor indicates that he has had medication in the two weeks previous to his visit to the blood bank, the technician is to "[t]ry to elicit from the donor the underlying condition for which the medication [is] prescribed. In most instances, it is the condition that necessitates the deferment rather than the medication." The donor card, with merely the word "lopresser" written at the top, does not reveal whether the technician asked what underlying condition required the donor to take lopresser. Nor does the card indicate whether the donor took the lopresser less than two weeks prior to donating blood. Because it cannot be determined from the card alone whether the technician complied with the guidelines, further inquiry through sources of information other than the donor's card is warranted.

The second question the donor answered unsatisfactorily was whether he had ever been deferred as a donor. The guidelines provide that before accepting a donor who answers "yes" to this question, the technician "need[s] to know whether temporary or permanent cause [sic]." We interpret this to mean that the technician must learn why the donor was previously deferred and then must determine whether that reason is a temporary or permanent cause for deferment. The donor's card contains the symbol "B/P," which may mean high blood pressure. However, there is no indication whether the donor's high blood pressure, either as an independent condition or a symptom of another condition, was grounds for temporarily or permanently deferring him. Accordingly, we hold that the donor card alone does not establish that the technician acted in accordance with the Bonfils' guidelines with respect to this particular question.

The donor's third unsatisfactory answer was that he had been out of the United States within the past three years. The guidelines provide that where this question is checked "yes," the technician is to:

"Defer for six months if malaria area is visited and donor did not take preventive medication. If a resident of area or on preventive medication, defer 3 years. . . . NOTE: If visit limited to malaria-free city and no trips of any kind taken into surrounding countryside, donor is acceptable."

The only words appearing on the donor's card regarding this question are "Germ" and "Copenhagen Denmark." There is no indication whether the donor was a resident of Germany or Copenhagen. Nor was there any indication that the technician had asked whether the donor had made any trips into the surrounding countryside while visiting Germany or Copenhagen. Whether the technician made these inquiries is not known because the cards contained none of this information. Again, relying solely upon the donor's card, it cannot be ascertained whether the guidelines were followed by the Bonfils' technician.

The last unsatisfactory answer by the donor was in response to whether he had ever had a venereal disease. According to the guidelines, the following procedures are to be followed in this situation: "Gonorrhea or `clap' — accept if treatment completed." The donor's card contains the word "ghonnorea [sic]." Nowhere is it noted that treatment for the disease was completed. Thus, further discovery should be permitted to determine whether the technician followed the guidelines regarding this unsatisfactory answer by the donor.

In essence, the guidelines effectively mandate that where any of the thirty donor card questions are unsatisfactorily answered, the technician must make certain follow-up inquiries. These inquiries determine whether the donor will be accepted, and determine whether the technician has followed the Bonfils guidelines. The donor cards are not designed to indicate whether the follow-up questions were asked or, if they were asked, what the responses were. Nor is the card designed to indicate whether the responses were interpreted by the technician in a manner consistent with the Bonfils guidelines. The basis for K.W.'s claims before us is that the donor's card does not contain sufficient information to determine whether the technician complied with the Bonfils guidelines. In light of our foregoing discussion, we agree.

IV.

Belle Bonfils claims that the identities of the volunteer blood donors whose blood was transfused to K.W. are confidential and privileged and may not be discovered without violating the public policies of the State of Colorado and the privacy interests of the volunteer donors. See §§ 25-4-1404, -1409, 11 C.R.S. (1987 Supp.) § 13-90-107(d), 6A C.R.S. (1987); C.R.C.P. 26(c). In our view, the identity of the donor should not be disclosed but limited discovery should be permitted.

A.

Petitioner asserts that records created and maintained by a blood bank that include the identity of a donor, as well as medical histories and physical examinations, fall within the ambit of the physician-patient privilege established by section 13-90-107(d), 6A C.R.S. (1987), which states:

"A physician, surgeon, or registered professional nurse duly authorized to practice his profession pursuant to the laws of this state or any other state shall not be examined without the consent of his patient as to any information acquired in attending the patient which was necessary to enable him to prescribe or act for the patient."

"The physician-patient privilege is statutorily created and must, therefore, be strictly construed. The burden of establishing the applicability of the privilege rests with the claimant of the privilege." Williams v. People, 687 P.2d 950, 953 (Colo. 1984) (citations omitted). The record does not reflect that the donor was seen by a physician or that he received medical care.

Kathyrn Hall, who interviewed the donor, was not a medically trained physician, surgeon, or professional nurse, and, at the time the donor provided blood to Belle Bonfils, no physician, surgeon, or registered nurse was physically present. The privilege does not include communications with medical technicians, Block v. People, 125 Colo. 36, 240 P.2d 512 (1951), cert. denied, 343 U.S. 978. If "[n]othing in the record reflects that the blood donors were seen by a physician or received medical care when they donated blood," the physician-patient privilege is not applicable. Tarrant County Hosp. Dist. v. Hughes, 734 S.W.2d 675 (Tex.App. 1987). But see Head v. Colloton, 331 N.W.2d 870 (Iowa 1983); Krygier v. Airweld, 137 Misc.2d 306, 520 N.Y.S.2d 475 (1987).

Respondents seek disclosure of the infected donor's name, address, and telephone number. In Wolf v. People, 117 Colo. 279, 187 P.2d 926 (1948), aff'd, 338 U.S. 25 (1949), we held that the physician-patient privilege does not extend to names, addresses, and telephone numbers. Such information, in our view, was not "acquired in attending the patient" nor was the information "necessary to enable him [the physician] to prescribe or act for the patient." § 13-90-107(d), 6A C.R.S. (1987). Accordingly, we conclude that the information requested by the respondents is not subject to the physician-patient privilege.

B.

Petitioner next asserts that disclosure of the identity of any individual who is known to test positive for the HIV virus is prohibited by sections 25-4-1404 and -1409(2), 11 C.R.S. (1987 Supp.). Section 2-4-202, 1B C.R.S. (1980), provides: "A statute is presumed to be prospective in its operation." In reviewing the relevant statutes we find nothing in the legislative enactments which would reflect an intent to overcome this presumption. People v. Holland, 708 P.2d 119 (Colo. 1985); California Co. v. State, 141 Colo. 288, 348 P.2d 382 (1959), appeal dismissed, 361 U.S. 285 (1960). The donor whose blood contaminated K.W. with the AIDS antibody tested positive on the HIV test in April 1986. K.W. and C.W. filed this lawsuit in February 1987. They first requested disclosure of the information in April 1987. The effective date of sections 25-4-1401 and -1410 was June 8, 1987. Therefore, sections 25-4-1404 and -1409(2) are to be applied prospectively, and do not apply to this action. Because nothing in the statutory scheme demonstrates intent on the part of the General Assembly to give the relevant statutes a retroactive effect we conclude that sections 25-4-1404 and -1409(2) do not apply to the facts of this case.

C.

Petitioner also asserts that compelling public policy grounds, including the maintenance of the supply of volunteer blood and the privacy interests of volunteer blood donors, require that discovery of the identities of volunteer blood donors be prohibited. We disagree.

C.R.C.P. 26(c) allows the trial court to issue protective orders as justice requires "to protect a party . . . from annoyance, embarrassment, or oppression, or undue burden or expense." A party who opposes discovery bears the burden of establishing the need for a protective order. Liedholt v. District Court, 619 P.2d 768, 771 (Colo. 1980).

When determining the extent materials sought to be discovered may be protected, the trial court must balance the competing interests that would be served by granting or denying discovery. Bond, 682 P.2d 33. The balancing test is accomplished by weighing the respective parties' interests in discovery of material facts against, in this case, a public policy interest in confidentiality. Liedholt, 619 P.2d at 1088. In determining the discoverability of an HIV-positive donor's identity, courts have applied a similar balancing test comparing the interest served by the state action with the donor's interest in privacy.

In Tarrant County Hospital District v. Hughes, 734 S.W.2d 675 (Tex.App. 1987), Tarrant County Hospital District (Tarrant) requested the issuance of a writ of mandamus to the trial court's order which compelled Tarrant to release and make available to the plaintiff certain documents identifying blood donors. The plaintiff in that case alleged that the deceased was given blood transfusions by Tarrant which resulted in her contracting Acquired Immune Deficiency Syndrome (AIDS), and ultimately in her death. Plaintiff further alleged that Tarrant failed to exercise the reasonable degree of care and skill in treatment ordinarily exercised by the hospital, as well as failed to provide a wholesome blood product. Ruling on Tarrant's objection to its request for production of information relating to blood donors, the trial court ordered Tarrant to disclose the identities and addresses of the blood donors. The court also ordered the plaintiff not to directly or indirectly contact any donor or undertake further discovery regarding such donors until permitted to do so by further order of the court.

The Texas Court of Appeals held "that the trial court order compelling [Tarrant] to identify blood donors is not an impermissible violation of their rights to privacy." Id. at 679. In conducting its balancing test, the court first acknowledged the legitimacy of the plaintiff's interest in the identification of the blood donors. It reasoned that the information was necessary for the plaintiff to pursue her cause of action against Tarrant. The court stated that the trial court's order protected the donor from public disclosure by prohibiting the plaintiff from contacting any donor identified through the produced records. The court also said that no evidence had been produced to suggest that the information sought by the plaintiff would be used improperly. The court concluded: "Because the trial court's order evidences a proper concern with protection of the individual's right of privacy, we hold that the record does not establish an invasion of any constitutionally protected right for liberty of the blood donors." Id. at 680 (citing Whalen v. Roe, 429 U.S. 589, 606-07 (1977)).

In Rasmussen v. South Florida Blood Service, 500 So.2d 533 (Fla. 1987), Rasmussen suffered injuries which required hospitalization. While in the hospital, he received fifty-one units of blood via transfusion. Approximately one year later he was diagnosed as having AIDS and later died as a result of the disease. Prior to his death, Rasmussen filed suit and sought to obtain all records, documents, and other materials indicating the names and addresses of the fifty-one blood donors from South Florida Blood Service. The blood service requested a protective order barring such disclosure. The trial court, however, denied the motion and ordered the blood service to disclose the subpoenaed information. The Third District Court of Appeals for Florida applied the test traditionally employed under the Florida discovery rules and concluded that the requested material was not discoverable. See South Florida Blood Serv. v. Rasmussen, 467 So.2d 798 (Fla.Dist.Ct.App. 1985). In affirming the court of appeals decision, the Florida Supreme Court concluded:

"Although we agree with respondent's contention that Rasmussen's blood donors' rights of privacy are protected by state and federal constitutions, we need not engage in the stricter scrutiny mandated by constitutional analysis. We find that the interests involved here are adequately protected under our discovery rules and approve the decision of the district court."

Rasmussen, 500 So.2d at 534-35. In so holding, the court balanced the competing interests that would be served by granting discovery or by denying it. In analyzing the privacy interests of the donors, the court stated: "Some method could be formulated to verify the blood service's report that none of the donors is a known AIDS victim while preserving the confidentiality of the donors' identities. However, the subpoena in question gives petitioner access to the names and addresses of the blood donors with no restrictions on their use." Id. at 537. The court found that disclosure of information relating to the donor implicates constitutionally protected privacy interests. Disclosure of such information, according to the court, would also deter blood donation and for that reason "society's interest in a strong and healthy blood supply will be furthered by the denial of discovery." Id. at 538.

The Rasmussen court noted the plaintiff's interest in obtaining the requested information to obtain full recovery and the state's concomitant interest in ensuring full compensation for victims of negligence, but concluded that the discovery order requested would do little to advance those interests. "The potential of significant harm to most, if not all, of the fifty-one unsuspecting donors in permitting such a fishing expedition is great and far outweighs the plaintiff's need under these circumstances." Id.

Finally, in Krygier v. Airweld, Inc., 137 Misc.2d 306, 520 N.Y.S.2d 475 (1987), the New York Blood Center, on reargument to the trial court, sought a protective order precluding Krygier from obtaining the names and addresses of twenty-one blood donors. Plaintiff alleged that during the course of treatment for severe burns, her deceased husband received donated blood which was infected with the HIV virus. She alleged that the transfusion caused her husband to contract AIDS.

Although the Krygier court stated that it "need not reach a [c]onstitutional analysis to arrive at its decision," it proceeded to employ a balancing test identical to that relied upon in Tarrant and Rasmussen. In reaching the conclusion that the blood center produce the donation records, but without revealing the names and addresses of the donors, the court stated:

"The blood bank's interest in maintaining the anonymity of their donors together with society's interest in maintaining the free flow of volunteer blood far outweigh the plaintiff's right to the disclosure of all evidence material and necessary to the prosecution of her suit."

Id. at 477.

Petitioner asserts that the privacy rights of blood donors must be protected; that the compelling interest of society in maintaining a safe and adequate supply of volunteer blood donations requires that the identities of blood donors be protected from discovery; and that the district court failed to properly balance the interests of the donors and of society in the preservation of confidentiality with the plaintiffs' interest in disclosure of donor identities. As Tarrant and Rasmussen indicate, the discovery requested in this case not only implicates privacy interests of the donor, as well as societal interests, but also impacts the rights of plaintiffs to obtain full recovery.

In balancing the competing interests here, the donor has a privacy interest in remaining anonymous and avoiding the embarrassment and potential humiliation of being identified as an AIDS carrier. Belle Bonfils, and society as a whole, have an interest in maintaining the availability of an abundant supply of volunteer blood for distribution to numerous hospitals. These interests must be weighed against K.W.'s and C.W.'s rights to the disclosure of all information necessary to pursue their claims. However, society as a whole also has an interest consistent with that of K.W. and C.W.; namely, that of maintaining a safe blood supply. Bonfils cannot claim absolute immunity from discovery when it is in the business of providing a product capable of transmitting disease.

The claims against Bonfils will turn primarily on whether K.W. and C.W. can establish that Bonfils failed to adequately screen and test the blood that infected K.W. in March of 1985. In our view, the masked donor cards made available to K.W. and C.W. do not provide them with sufficient information relating to the screening and testing procedures that will permit them to prosecute their claims. Therefore, in order to prosecute their claims, it is necessary for K.W. and C.W. to have controlled access to the donor to discover whether, from the donor's perspective, the screening procedures were followed.

Since there is a genuine negligence issue, respondents should not be denied the opportunity of pursuing discovery directed at events that transpired when the infected blood was donated. While we recognize that the donor has an interest in maintaining his privacy, we conclude that, in light of the foregoing discussion, the interests of K.W. and C.W. outweigh that of the donor.

V.

Discovery matters lie largely within the sound discretion of the trial court. Neusteter v. District Court, 675 P.2d 1 (Colo. 1984); In re Marriage of Mann, 655 P.2d 814 (Colo. 1980). Generally, the appropriate mechanism for reviewing discovery matters is by appeal rather than by original proceeding. Neusteter, 675 P.2d at 4. When, however, a procedural ruling may significantly affect a party's ability to litigate the merits of a case and may cause damage to a party that cannot be cured on appeal, it is appropriate to challenge a trial court's order relating to matters of pretrial discovery by way of an original proceeding. Bond v. District Court, 682 P.2d 33 (Colo. 1984); Kerwin v. District Court, 649 P.2d 1086 (Colo. 1982); Sanchez v. District Court, 624 P.2d 1314 (Colo. 1981); Lucas v. District Court, 140 Colo. 510, 345 P.2d 1064 (1959).

It is our duty in this original proceeding to tailor a limited procedure for discovery to protect the rights of all parties. See Bond, 682 P.2d at 36; Kerwin, 649 P.2d at 1088; Sanchez, 624 P.2d at 1316. As the Rasmussen court acknowledged, discovery can be conditioned so that the plaintiff can obtain the needed information "while preserving the confidentiality of the donors' identities." Rasmussen, 500 So.2d at 537.

C.R.C.P. 26(b)(1) permits a party in civil litigation to obtain discovery of any matter which is not privileged and which is relevant to the subject matter involved in the pending case. As it is our duty to fashion a discovery remedy, we must examine the Colorado Rules of Civil Procedure to determine which method of discovery is suitable. An oral deposition pursuant to C.R.C.P. 30 is not appropriate, as the identity of the donor must be protected. Written interrogatories and requests for production are similarly unavailable because the donor is not a party to this action. See C.R.C.P. 33. In our view, the only viable discovery device is a deposition upon written questions, pursuant to C.R.C.P. 31. While C.R.C.P. 31 is rarely used, and is seldom the most desirable means of pursuing discovery, it is suitable to protect the identity of the donor, and allow K.W. and C.W. to obtain relevant information relating to their claims of negligence.

The written questions are to be submitted by respondents to the clerk of the district court. The clerk of the district court will be provided with the current name and address of the infected donor by Belle Bonfils' attorney. The clerk of the court will then mail the written questions to the infected donor, who, after answering the questions, will return them to the clerk. The clerk shall keep the name and address of the donor in the strictest confidence. The written questions shall be crafted and limited so that the identity of the donor is not revealed. Respondents may not ask the name of the donor or his address. Such relief, in our view, permits the respondents to obtain the information they require, without risking the potentially adverse consequences of disclosing publicly the identity of the donor and without burdening the competing interests of the blood bank, or infringing upon society's interests in a safe, adequate, voluntary blood supply.

Accordingly, we make the rule absolute in part and discharge the rule in part.

CHIEF JUSTICE QUINN dissents, and JUSTICE VOLLACK and JUSTICE MULLARKEY join in the dissent.