ROWLEY, Judge:
In this wrongful death and survival action, plaintiff/appellant, Angelo Jistarri, administrator of the estate of his mother, Adeline Jistarri, appeals timely from the judgment entered in favor of defendants/appellees on June 29, 1987.
Appellant instituted the present action, against Doctors Dominic Nappi, Frank Mattei, Ronald Codario, and the Saint Agnes Medical Center (hereinafter “Saint Agnes”). He alleged that Doctors Nappi and Codario had been negligent in their treatment of Mrs. Jistarri and that Saint Agnes, the hospital in which Mrs. Jistarri was treated, was liable on a theory of ostensible or apparent agency. The alleged liability of Dr. Mattei was premised solely on his position as Dr. [587]*587Nappi’s partner. Saint Agnes subsequently joined Dr. Mangino as an additional defendant.
The facts giving rise to the present action, as alleged by appellant, are that Dr. Mangino, an orthopedic resident, negligently applied a cast to Mrs. Jistarri’s broken wrist without adequate padding, thereby causing an ulcer to develop beneath the cast; Dr. Nappi, an orthopedist, negligently failed to remove the cast and to diagnose the infection; the ulcer allowed a staphylococcus aureus infection to enter Mrs. Jistarri’s bloodstream; and the infection spread to and damaged Mrs. Jistarri’s heart, thereby weakening her and rendering her susceptible to the complications that eventually caused her death.
The case was tried before a jury. Dr. Codario, an internist and the primary physician in charge of the treatment of Mrs. Jistarri’s staph aureus infection, was granted a compulsory nonsuit at the close of the presentation of plaintiff’s case. On September 25, 1986, the jury returned a verdict in favor of the remaining defendants, who are now before us as appellees. Post-trial motions were filed and denied, and judgment was entered in favor of defendants/appellees.
In this appeal appellant contends that the trial court erred in 1) instructing the jury on the standard of care of an orthopedic resident; 2) instructing the jury that a physician does not warrant a cure or guarantee the result of treatment; and 3) denying appellant the right to read certain portions of the deposition of Dr. Codario, an adverse party. For the reasons set forth below, we affirm.
The events at issue herein began on September 13, 1980, when Mrs. Jistarri, who was eighty-five years old, suffered a fall in her home. X-rays taken two days later at Saint Agnes revealed an acute fresh fracture of the left wrist. On September 19, 1980, Dr. Mangino applied a cast to Mrs. Jistarri’s left wrist in the emergency room at St. Agnes. She was told to return to the St. Agnes orthopedic clinic at a later date in order to have the cast checked by Dr. Nappi. On September 23, 1980, Mrs. Jistarri came to the clinic and was examined by Dr. Nappi, who reported no signs of [588]*588discomfort with the cast. At trial, however, appellant testified that at that time his mother had swollen, purple fingers and was complaining of pain. On September 24, 1980, Mrs. Jistarri was brought to the St. Agnes emergency room complaining of chest pain and was admitted into the care of Dr. Codario. Blood cultures revealed the presence of a staphylococcus aureus infection. On September 29, 1980, the cast was removed, revealing an area of redness with exudate. Several days later an ulcer was found in the same area. A culture taken from the ulcer revealed staph aureus. The infection responded well to treatment, and by mid-November Mrs. Jistarri appeared well enough to leave the hospital. She did not do so, however, owing to the inability of her children to care for her at home. On December 15, 1980, she became ill again. A number of complications developed, and she died on December 27, 1980.
Appellant challenges two aspects of the trial court’s instructions to the jury. To determine whether the trial court erred in instructing the jury, as claimed by appellant, we must read the jury instructions in their entirety. Riddle Memorial Hospital v. Dohan, 504 Pa. 571, 576, 475 A.2d 1314, 1316 (1984); Spearing v. Starcher, 367 Pa.Super. 22, 29-31, 532 A.2d 36, 40 (1987). To constitute reversible error, a jury instruction must be shown to have been not only erroneous, but also harmful to appellant. Anderson v. Hughes, 417 Pa. 87, 92, 208 A.2d 789, 791 (1965); Spearing v. Starcher, supra. If a charge is wholly inadequate or unclear, or if it has a tendency to mislead and confuse rather than to clarify issues, a new trial will be granted. Spearing v. Starcher, supra.
Appellant first challenges the trial court’s instruction concerning the standard of care to which Dr. Mangino, an orthopedic resident, should be held. The trial court explained that:
A resident is a licensed physician receiving training in a specialty in a hospital. Now, he was not a fully-trained [589]*589orthopedist nor was he a general practitioner without any specialized training.
He is, therefore, held to exercise that degree of skill, learning and care normally possessed by an orthopedic resident in the circumstances of Dr. Mangino.
Under this professional standard of care, a physician must also keep informed of the contemporary developments in the medical profession and his specialty and he must use these current skills and knowledge.
N.T., 9/24/86, at 197. Appellant contends that the trial court erred in instructing the jury that Dr. Mangino should be held to exercise the same degree of skill, learning, and care normally possessed by orthopedic residents in the same circumstances. Relying on this Court’s holding in Pratt v. Stein, 298 Pa.Super. 92, 444 A.2d 674 (1982), appellant asserts that an orthopedic resident must be held to the same standard of care as an orthopedic specialist.1
In Pratt v. Stein, supra, the defendant/appellant hospital argued on appeal that the trial court had erred in instructing the jury that the hospital’s residents were to be held to the standard of an “ordinary physician.” The basis of the hospital’s objection was that while there had been extensive testimony concerning the standard of care for a specialist, there had been none concerning the standard of care for a nonspecialist.2 It was noted that the courts of this Commonwealth had never directly addressed the question whether a resident should be held to the standard of a [590]*590general practitioner or of a specialist. The Court described as “a sound conclusion” the ruling of the United States District Court in Harrigan v. United States, 408 F.Supp. 177 (E.D.Pa.1976), that a resident should be held to the standard of a specialist when the resident is acting within his field of specialty. Pratt v. Stein, 298 Pa.Super. at 157, 444 A.2d at 708. “It belies logic to assert that a resident authorized to practice his specialty on patients requiring and expecting the services of a specialist should, for some inexplicable reason, be judged against the standard used to appraise the reasonableness of a non-specialist’s conduct” Id. (footnote omitted; emphasis added). While agreeing “that the trial judge erred in instructing the jury to use the less exacting standard of care applicable to a non-specialist,” id.,
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ROWLEY, Judge:
In this wrongful death and survival action, plaintiff/appellant, Angelo Jistarri, administrator of the estate of his mother, Adeline Jistarri, appeals timely from the judgment entered in favor of defendants/appellees on June 29, 1987.
Appellant instituted the present action, against Doctors Dominic Nappi, Frank Mattei, Ronald Codario, and the Saint Agnes Medical Center (hereinafter “Saint Agnes”). He alleged that Doctors Nappi and Codario had been negligent in their treatment of Mrs. Jistarri and that Saint Agnes, the hospital in which Mrs. Jistarri was treated, was liable on a theory of ostensible or apparent agency. The alleged liability of Dr. Mattei was premised solely on his position as Dr. [587]*587Nappi’s partner. Saint Agnes subsequently joined Dr. Mangino as an additional defendant.
The facts giving rise to the present action, as alleged by appellant, are that Dr. Mangino, an orthopedic resident, negligently applied a cast to Mrs. Jistarri’s broken wrist without adequate padding, thereby causing an ulcer to develop beneath the cast; Dr. Nappi, an orthopedist, negligently failed to remove the cast and to diagnose the infection; the ulcer allowed a staphylococcus aureus infection to enter Mrs. Jistarri’s bloodstream; and the infection spread to and damaged Mrs. Jistarri’s heart, thereby weakening her and rendering her susceptible to the complications that eventually caused her death.
The case was tried before a jury. Dr. Codario, an internist and the primary physician in charge of the treatment of Mrs. Jistarri’s staph aureus infection, was granted a compulsory nonsuit at the close of the presentation of plaintiff’s case. On September 25, 1986, the jury returned a verdict in favor of the remaining defendants, who are now before us as appellees. Post-trial motions were filed and denied, and judgment was entered in favor of defendants/appellees.
In this appeal appellant contends that the trial court erred in 1) instructing the jury on the standard of care of an orthopedic resident; 2) instructing the jury that a physician does not warrant a cure or guarantee the result of treatment; and 3) denying appellant the right to read certain portions of the deposition of Dr. Codario, an adverse party. For the reasons set forth below, we affirm.
The events at issue herein began on September 13, 1980, when Mrs. Jistarri, who was eighty-five years old, suffered a fall in her home. X-rays taken two days later at Saint Agnes revealed an acute fresh fracture of the left wrist. On September 19, 1980, Dr. Mangino applied a cast to Mrs. Jistarri’s left wrist in the emergency room at St. Agnes. She was told to return to the St. Agnes orthopedic clinic at a later date in order to have the cast checked by Dr. Nappi. On September 23, 1980, Mrs. Jistarri came to the clinic and was examined by Dr. Nappi, who reported no signs of [588]*588discomfort with the cast. At trial, however, appellant testified that at that time his mother had swollen, purple fingers and was complaining of pain. On September 24, 1980, Mrs. Jistarri was brought to the St. Agnes emergency room complaining of chest pain and was admitted into the care of Dr. Codario. Blood cultures revealed the presence of a staphylococcus aureus infection. On September 29, 1980, the cast was removed, revealing an area of redness with exudate. Several days later an ulcer was found in the same area. A culture taken from the ulcer revealed staph aureus. The infection responded well to treatment, and by mid-November Mrs. Jistarri appeared well enough to leave the hospital. She did not do so, however, owing to the inability of her children to care for her at home. On December 15, 1980, she became ill again. A number of complications developed, and she died on December 27, 1980.
Appellant challenges two aspects of the trial court’s instructions to the jury. To determine whether the trial court erred in instructing the jury, as claimed by appellant, we must read the jury instructions in their entirety. Riddle Memorial Hospital v. Dohan, 504 Pa. 571, 576, 475 A.2d 1314, 1316 (1984); Spearing v. Starcher, 367 Pa.Super. 22, 29-31, 532 A.2d 36, 40 (1987). To constitute reversible error, a jury instruction must be shown to have been not only erroneous, but also harmful to appellant. Anderson v. Hughes, 417 Pa. 87, 92, 208 A.2d 789, 791 (1965); Spearing v. Starcher, supra. If a charge is wholly inadequate or unclear, or if it has a tendency to mislead and confuse rather than to clarify issues, a new trial will be granted. Spearing v. Starcher, supra.
Appellant first challenges the trial court’s instruction concerning the standard of care to which Dr. Mangino, an orthopedic resident, should be held. The trial court explained that:
A resident is a licensed physician receiving training in a specialty in a hospital. Now, he was not a fully-trained [589]*589orthopedist nor was he a general practitioner without any specialized training.
He is, therefore, held to exercise that degree of skill, learning and care normally possessed by an orthopedic resident in the circumstances of Dr. Mangino.
Under this professional standard of care, a physician must also keep informed of the contemporary developments in the medical profession and his specialty and he must use these current skills and knowledge.
N.T., 9/24/86, at 197. Appellant contends that the trial court erred in instructing the jury that Dr. Mangino should be held to exercise the same degree of skill, learning, and care normally possessed by orthopedic residents in the same circumstances. Relying on this Court’s holding in Pratt v. Stein, 298 Pa.Super. 92, 444 A.2d 674 (1982), appellant asserts that an orthopedic resident must be held to the same standard of care as an orthopedic specialist.1
In Pratt v. Stein, supra, the defendant/appellant hospital argued on appeal that the trial court had erred in instructing the jury that the hospital’s residents were to be held to the standard of an “ordinary physician.” The basis of the hospital’s objection was that while there had been extensive testimony concerning the standard of care for a specialist, there had been none concerning the standard of care for a nonspecialist.2 It was noted that the courts of this Commonwealth had never directly addressed the question whether a resident should be held to the standard of a [590]*590general practitioner or of a specialist. The Court described as “a sound conclusion” the ruling of the United States District Court in Harrigan v. United States, 408 F.Supp. 177 (E.D.Pa.1976), that a resident should be held to the standard of a specialist when the resident is acting within his field of specialty. Pratt v. Stein, 298 Pa.Super. at 157, 444 A.2d at 708. “It belies logic to assert that a resident authorized to practice his specialty on patients requiring and expecting the services of a specialist should, for some inexplicable reason, be judged against the standard used to appraise the reasonableness of a non-specialist’s conduct” Id. (footnote omitted; emphasis added). While agreeing “that the trial judge erred in instructing the jury to use the less exacting standard of care applicable to a non-specialist,” id., we concluded that since the error inured to the benefit of the defendant hospital, a new trial was unnecessary.
In the present case, unlike Pratt v. Stein, the jury was not instructed to use the “less exacting standard of care applicable to a non-specialist.” Such an instruction would clearly have been error under Pratt v. Stein. To the contrary, the trial court in the present case explicitly informed the jury that Dr. Mangino was not a general practitioner without any specialized training. The court explained to the jury exactly what Dr. Mangino was: “a licensed physician receiving training in a specialty in a hospital” (emphasis added). Further, the court went on to say that Dr. Mangino was required to “keep informed of the contemporary developments in the medical profession and his specialty ...” (emphasis added).
Whether a resident should be held to an intermediate standard of care, such as that which the trial court instructed the jury to apply in the present case, is an issue that was not before us in Pratt v. Stein.3 We conclude that the trial [591]*591court did not err in instructing the jury to apply to Dr. Mangino a standard of care higher than that for general practitioners but less than that for fully trained orthopedic specialists. Such an instruction recognizes that Dr. Mangino has had more training than a general practitioner but less than a fully trained orthopedist. To require a resident to meet the same standard of care as a fully trained specialist would be unrealistic. A resident may have had only days or weeks of training in the specialized residency program; a specialist, on the other hand, will have completed the residency program and may also have had years of experience in the specialized field. If we were to require the resident to exercise the same degree of skill and training as the specialist, we would, in effect, be requiring the resident to do the impossible.
In so holding, we do not deny “the reality ... that the vast majority of the day-to-day treatment which a patient receives is rendered by a resident employed by the hospital,” Pratt v. Stein, 298 Pa.Super. at 157, 444 A.2d at 708, nor do we leave plaintiffs without recourse if a situation arises in which a resident has been given responsibilities that exceed the level of skill and training reasonably to be expected of one who is still learning his or her specialty. The ultimate responsibility for the training and supervision of residents lies with the employing hospital, and it is to the [592]*592hospital that a plaintiff must turn in such a situation.4 Accordingly, we hold that the trial court did not err in instructing the jury concerning the standard of care applicable to Dr. Mangino.
Appellant also asserts that the trial court erred in instructing the jury that a physician does not warrant a cure or guarantee the result of his or her treatment. Appellant concedes that the instruction, in and of itself, is a correct statement of the law. See Collins v. Hand, 431 Pa. 378, 383, 246 A.2d 398, 401 (1968) (in absence of a special contract, a physician neither warrants a cure nor guarantees the result of treatment). He argues, however, that as he had not made any claim based on a warranty theory, the trial court’s instruction confused the jury. The relevant portion of the jury instruction is as follows:
Professional negligence, also known as malpractice, consists of a careless or unskilled performance by a physician of the duties imposed upon him by his professional relationship with his patient.
It is also negligence when a physician shows a lack of proper care and performance of a professional act.
However, a physician does not warrant a cure, nor does he guarantee the result of his treatment.
N.T., 9/24/86, at 195-96. When the instruction to which appellant objects is read in context, it is apparent that the trial court did not, as appellant asserts, “introduce a concept which had no place in this case” (Brief for Appellant at 19). Instead, the court gave the jury a piece of information that was necessary if they were fully to understand the concept of negligence. Having read the instructions in their entirety, as we must, we conclude that the trial court did not err in giving the instruction in question.
Appellant’s final issue is whether the trial court erred in denying his request to read portions of the deposition of Dr. Codario. The disputed portions of the deposition are not included in the record that has been certified to this Court. [593]*593Appellant asserts, however, that in the excluded portions of the deposition, Dr. Codario states repeatedly that in his opinion the staph infection entered Mrs. Jistarri’s bloodstream through the ulcer under her cast.
Dr. Codario’s deposition was taken on July 16, 1985. In a letter dated April 24, 1986, appellant’s counsel informed appellees’ counsel, “in lieu of Answers to Expert Witness Interrogatories,” that he intended to read the deposition of Dr. Codario at trial. After receiving objections to this plan from appellees’ counsel, appellant’s counsel informed them, in a letter dated June 27, 1986, that in light of their objections he now intended to call Dr. Codario as an expert witness at trial, and “in lieu of answers to expert witness interrogatories, kindly refer to Dr. Codario’s signed deposition....”
Trial began on September 18, 1986. At trial appellant’s counsel called Dr. Codario as on cross-examination and informed the court that he intended to offer him as an expert witness in internal medicine and to ask him opinion questions (N.T., 9/18/86, at 127). Appellant’s counsel explained that “I am not offering him at this point, at least, as a witness for the plaintiff [appellant]. He is an adverse party; but he has made admissions, including opinions, that are relevant to this case, and I intend to elicit those” (N.T., 9/18/86, at 129). Counsel for the opposing parties, including Dr. Codario, raised a number of objections: appellant had not listed Dr. Codario as an expert witness, he could not require Dr. Codario to give expert testimony against his will, and he should not be allowed to obtain expert testimony from Dr. Codario while at the same time refusing to offer Dr. Codario as his witness, thereby retaining the advantages that accompany the questioning of a witness as on cross-examination (N.T., 9/18/86, at 128-136). Instead of ruling on opposing counsel’s objections, the trial court asked all parties to provide memoranda of law on the issues that had been raised (N.T., 9/18/86, at 135). Appellant’s counsel proceeded to ask non-opinion questions of Dr. Codario. The next day, appellant’s counsel informed the court [594]*594that he would read into evidence portions of Dr. Codario’s deposition but that he would not ask opinion questions of Dr. Codario (N.T., 9/19/86, at 4-5). As a result, the trial court did not rule on the objections to appellant’s initial plan to ask opinion questions of Dr. Codario.
However, when appellant’s counsel attempted to read into evidence the portions of the deposition in which Dr. Codario stated that in his opinion the ulcer under Mrs. Jistarri’s cast was the source of her staph infection, opposing counsel again objected. They argued that opinion testimony contained in the deposition was subject to the same objections as had been raised to opinion testimony given on the witness stand, and that, in addition, Dr. Codario’s deposition had been noticed purely as a discovery deposition, Dr. Codario had not been prepared to give expert opinions at the deposition, opposing counsel had not been prepared to cross-examine him as if he were an expert witness, opposing counsel had agreed to the usual stipulations concerning all but the form of the questions, and the disputed portions of the deposition contained hearsay (N.T., 9/22/86, at 11-21). The trial court barred appellant’s counsel from reading the portions of the deposition in which Dr. Codario gave his opinion as to the source of the staph infection, reasoning that these statements constituted substantive evidence against other defendants (N.T., 9/22/86, at 28-37). Appellant’s counsel then read into evidence non-opinion portions of the deposition as substantive evidence in appellant’s case (N.T., 9/22/86, at 33). Appellant’s counsel did not question Dr. Codario on the witness stand concerning his opinion as to the source of the staph infection.
The admissibility of expert testimony is a matter within the sound discretion of the trial court, whose decision will not be reversed absent a clear abuse of that discretion. Pascone v. Thomas Jefferson University, 357 Pa.Super. 524, 529, 516 A.2d 384, 386 (1986), appeal denied, 517 Pa. 320, 536 A.2d 338 (1988). Moreover, we may affirm the decision of the trial court if it is correct on any ground. E.J. McAleer & Co. v. Iceland Products, Inc., 475 Pa. 610, [595]*595613 n. 4, 381 A.2d 441, 443 n. 4 (1977); Pascone v. Thomas Jefferson University, supra. We note also that an order refusing to grant a new trial will not be disturbed absent a manifest abuse of discretion or an error of law. Bell v. Western Pennsylvania Hospital, 293 Pa.Super. 37, 42, 437 A.2d 978, 981 (1981).
In its opinion, the trial court explains that appellant was denied the right to read the challenged portions of the deposition because 1) appellant was attempting to introduce an expert opinion without having identified Dr. Codario as an expert and without having furnished a synopsis of his expected testimony, as required by Pa.R.C.P. 4008.5; and 2) an expert witness may not be compelled to give an opinion against his will. Resolution of appellant’s contention that the trial court erred in so holding requires that we examine several of the Rules of Civil Procedure. Appellant relies on Pa.R.C.P. 4020(a)(2) and (5) to support his argument that the trial court erred in refusing to allow the disputed portions of the deposition to be read into evidence. Rule 4020(a)(5), which provides that the deposition of a medical witness, other than a party, may be used at trial for any purpose, regardless of the witness’s availability, is inapplicable in the present case. Although Dr. Codario was eventually granted a nonsuit, he was still a party when appellant sought to introduce portions of his deposition into evidence. Therefore, Rule 4020(a)(5) does not apply. Rule 4020(a)(2), on the other hand, which provides that the deposition of a party may be used by an adverse party for any purpose, is applicable. However, it contains a limitation not acknowledged by appellant: the deposition may be so used only insofar as it is admissible under the rules of evidence.5 In general, therefore, the test of admissibility of a deposition under Rule 4020(a)(2) is the same as that for the admissibility of like testimony offered by a witness on the [596]*596stand in open court. Pascone v. Thomas Jefferson University, 357 Pa.Super. at 530, 516 A.2d at 387. Appellant has proffered the deposition testimony of Dr. Codario as that of an expert witness in the field of internal medicine. Therefore, the disputed portions of the deposition, even though they are part of the deposition of a party, must meet the standards to which expert testimony in general is held.
We do not agree with the trial court that appellant failed to give notice of his intention to introduce Dr. Codario’s expert testimony. Rule 4003.5 provides that a party may, through interrogatories, require any other party to identify each person whom the other party expects to call as an expert witness at trial, to state the subject matter on which the expert is expected to testify, and to have the expert state, either in answers to the interrogatories or in a separate report, the substance of the facts and opinions to which he or she is expected to testify and a summary of the grounds for each opinion. While the notification procedure chosen by appellant was hardly ideal, we cannot say that appellees were denied notice that Dr. Codario might be called by appellant as an expert witness. They were informed almost five months prior to trial, by the letter of appellant’s counsel dated April 24, 1986, that Dr. Codario would, in effect, be offered as an expert witness and that his opinion testimony would be that which was contained in his deposition.6 The purpose of Rule 4003.5 is to prevent the. unfairness that would occur if one party were unable to counter the expertise of a surprise witness produced at the last minute by the opposing party. See Clark v. Hoerner, 362 Pa.Super. 588, 598, 525 A.2d 377, 382 (1987). The notice provided by appellant in the present case was sufficient to allow appellees to counter the opinion testimony, in whatever form it might be offered, of Dr. Codario.
[597]*597The second reason offered by the trial court in support of its ruling is that allowing the disputed portions of the deposition to be read into evidence would be tantamount to compelling Dr. Codario to give an expert opinion against his will. The basis for the trial court’s ruling was our Supreme Court’s holding in Evans v. Otis Elevator Co., 403 Pa. 13, 168 A.2d 573 (1961). In that case, defendant/appellant Otis sought to call Mr. Geise, an expert retained by plaintiff/appellee Evans, to testify as a witness, both factual and expert, for Otis. Geise had already been examined by Evans and cross-examined by Otis. The trial court recognized the expert’s right not to testify as an expert witness for the adverse party, and the Supreme Court affirmed. Id., 403 Pa. at 27, 168 A.2d at 580.
Appellant suggests several reasons why the rule of Evans v. Otis Elevator Co. should not be applied in the present case. First, he argues that “[i]n the area of medical causation the line between fact and opinion is often times unclear” (Brief for Appellant at 16), and therefore Dr. Codario’s determination of the source of Mrs. Jistarri’s infection could be considered a fact rather than an expert opinion. However, appellant characterized the disputed portions of the deposition as opinion testimony in his arguments to the trial court, and he cannot now argue a different theory to this Court. Moreover, Dr. Donald Kaye, a board-certified specialist in internal medicine and infectious diseases who was called as an expert witness by Doctors Nappi and Mattei, testified that in his opinion there were three possible sites, all equally likely, at which the staph infection could have entered Mrs. Jistarri’s bloodstream: the ulcer; her leg, which had been swollen and tender; and a non-apparent skin lesion (N.T., 9/22/86, at 142-143). Dr. Kaye added that the lungs were a possible but less likely source (N.T., 9/22/86, at 143-44) and that he was unable to say with a reasonable degree of medical certainty where the infection had entered the bloodstream (N.T., 9/22/86, at 158). Dr. Codario’s determination of the source of the infection cannot reasonably be viewed as a matter of fact if that “fact” is disputed by another expert.
[598]*598Second, appellant points out that Pa.R.C.P. 4011(f), which provided that no discovery would be permitted which would require a deponent, whether or not a party, to give an opinion as an expert witness over his objection, has been rescinded. See Neal by Neal v. Lu, 365 Pa.Super. 464, 470, 530 A.2d 103, 106 (1987). The issue before us, however, is not what can be discovered, but what can be admitted into evidence at trial. As Pa.R.C.P. 4003.17 makes clear, information may properly be sought during discovery even though that information may not be admissible at trial. Therefore, the fact that Dr. Codario could not refuse to give an expert opinion in the course of his deposition does not mean that the portions of his deposition in which expert opinions are expressed must be admitted into evidence.
Finally, appellant suggests that the right to refuse to give expert testimony for the adverse party, which was affirmed in Evans v. Otis Elevator Co., can be claimed only by a non-party expert witness. While the expert witness in that case was indeed a non-party, the holding by its terms is not limited to non-parties, and appellant has not suggested why the holding should be so limited. Moreover, although Dr. Codario was a party to the case at the time that appellant sought to have his deposition admitted into evidence, his position with respect to the excluded portions of the deposition was essentially no different than if he had been a non-party expert who had been asked by appellant to testify concerning the care exercised by the other defendant physicians. As appellant explains in his brief,
[o]ne of the fundamental issues in this case was whether the staph aureus infection entered Mrs. Jistarri's bloodstream through the ulcer which was found under her cast. Defendant Ronald Codario is a board certified specialist in internal medicine and was the primary attending physician in charge of the care and treatment for the systemic infection suffered by Adeline Jistarri. [599]*599During his pretrial deposition Dr. Codario was questioned repeatedly as to whether he was able to determine the source of the infection. Dr. Codario stated on at least eight occasions in his deposition that the source of the infection was the ulcer under her cast.
(Brief for Appellant at 12; emphasis added.) As this statement makes clear, Dr. Codario treated Mrs. Jistarri after the systemic infection had developed. Appellant does not accuse Dr. Codario of having caused that infection, nor has appellant appealed the grant of a compulsory nonsuit to Dr. Codario. Thus, it is beyond dispute that Dr. Codario’s statements concerning the source of the staph infection, if admitted into evidence at a new trial as requested by appellant, would not address Dr. Codario’s own liability, but rather that of the other defendant physicians.
The question before us, therefore, is not whether a medical expert who is also a defendant may be required to give expert testimony that is relevant to his own allegedly negligent conduct, but whether such a witness may be required to give expert testimony concerning the allegedly negligent conduct of other defendants. We conclude that he may not. If appellant desired to present expert testimony concerning the origin of the staph infection as substantive evidence against Doctors Nappi, Mattei, and Mangino, he was free to retain his own expert witnesses; in fact, appellant retained Dr. Balenszweig, an orthopedic specialist. Given our Supreme Court’s holding in Evans v. Otis Elevator Co., however, appellant was not free to require Dr. Codario to give expert testimony, against his will, against the other defendants. “[T]he private litigant has no more right to compel a citizen to give up the product of his brain, than he has to compel the giving up of material things.” Pennsylvania Company for Insurances, etc., Trustee v. Philadelphia, 262 Pa. 439, 442, 105 A. 630 (1918), cited in Evans v. Otis Elevator Co., supra. Accordingly, we perceive no abuse of discretion in the trial court’s decision to exclude from evidence the portions of Dr. Codario’s deposition in which Dr. [600]*600Codario stated an opinion concerning the source of the staph infection.
Having examined the record and the arguments advanced by the parties, we conclude that the issues raised by appellant are without merit. Accordingly, we affirm the judgment entered in favor of appellees.
JUDGMENT AFFIRMED.
WIEAND, J., files a concurring and dissenting opinion.