BAILEY ALDRICH, Senior Circuit Judge.
Plaintiff Lorraine Ann Meschino, while totally anesthetized on the operating table for a surgical procedure, suffered an episode of cardiac arrest due to an insufficient oxygen supply, resulting in damage to her brain. One immediate cause of the oxygen deficiency was defendant registered anesthetic nurse Woitkowski’s insertion of a so-called “PEEP” valve manufactured by defendant Boehringer Laboratories, Inc. into the supply side of plaintiffs ventilation circuit instead of into the exhaust side. This was but one of a number of serious errors by her, and by defendant anesthesiologist, Dr. Fleet, who, jointly with her, will sometimes be referred to as the medical defendants. The medical defendants settled out during trial, and the trial continued as against Boehringer, North America Drager, Inc., hereinafter NAD, the maker of the anesthesia machine, hereinafter Nar-komed 2, and Bay State Anesthesia, Inc., its supplier to the Lahey Clinic, where plaintiffs operation was performed. La-hey Clinic, originally named as a defendant, had received a voluntary dismissal. The remaining issues were the corporate defendants’ alleged faults, and whether the medical defendants’ faults were, in effect, exculpatory, viz., superseding cause. The court directed a verdict in favor of Bay State at the end of plaintiff’s case, and ultimately the jury answered special questions favorably to the other two defendants. Plaintiff complains as to these re-suits, and to the court’s rulings on evidence in a number of particulars. We affirm in part and reverse in part.
We start with liability. The special questions answered by the jury were as follows.
SPECIAL VERDICT FORM
1. Do you find that any of the doctors, nurses, or technicians, including either Dr. Shelly Fleet or Nurse Nancy Woitko-ski [sic], were negligent on October 14, 1983 in the treatment of the plaintiff, Lorraine Anne Meschino?
ANSWER: YESjZ. NO
If the answer to Question # 1 is Yes proceed to Question # 2.
If the answer to Question #1 is No proceed to Question #3.
2. Was the negligence of the doctors,
nurses or technicians, including either Dr. Fleet or Nurse Woitkoski [sic], the sole cause of Lorraine Meschino’s injury? ANSWER: YES NO
If the answer to Question #2 is No proceed to Question #3.
If the answer to Question #2 is Yes proceed no further and report to the Court that you have reached a verdict.
There followed eleven questions dealing principally with individual alleged faults of NAD with regard to the machine, and Boehringer with respect to the PEEP valve, which, pursuant to the form’s instructions, were not reached.
While Questions 1 and 2 might, perhaps, have been differently worded, examination of the questions following, addressed to defendants’ individual alleged faults, as well as examination of the charge itself, satisfies us that, by their given answers, the jury had concluded that defendants were free of fault. To read the questions otherwise would, moreover, have made superfluous the unanswered Question 13, addressed to superseding cause. It follows that plaintiff’s extensive argument that the court erred in submitting, and charging upon, superseding cause as an alternative defense, terminating, so to speak, defendants’ faults, is irrelevant. If defendants were free of fault, there was nothing for them to be relieved from. We proceed, accordingly, to those matters which allegedly improperly damaged plaintiff’s attempts to obtain a favorable answer to Question 2.
The complaint most stressed, made in a number of ways, is based on the ultimate fact that plaintiff failed to afford the jury a view of the actual Narkomed 2 machine involved, which was still in use (unchanged) at the Lahey Clinic, or of a duplicate, to aid in its understanding, and weighing, her criticisms, as advanced by her expert.
The Narkomed 2 machine is a comprehensive device which, using a single tube, introduces controlled amounts of anesthesia and oxygen and then exhausts the patient’s lungs, completing the ventilation cycle. The patient’s own breathing may accomplish the cycle, or it may be forced automatically, or by manual activation. In certain circumstances a PEEP valve, a check valve limiting flow to one direction, must be inserted in the exhalation line to maintain pressure in the lungs. Plaintiff’s care prior to surgery had required and employed such a valve. Because she had not researched plaintiff’s history, Dr. Fleet had failed to have a PEEP valve immediately at hand, and began administration of anesthesia while one was being sent for. Fifteen minutes before incision, she left instructions with Woitkowski to install the PEEP valve on its arrival, and returned to her office. The valve arrived prior to incision, but Woitkowski neglected to install it. Upon incision, the surgeon noticed that plaintiff’s blood was darkened, indicating inadequate oxygenation. A remark by a surgical resident that plaintiff had been under PEEP before the procedure reminded Woitkowski of the need for the valve, and she thereupon installed it, inexplicably in the wrong line. The effect of this on the patient was noticed rather quickly, but the source of the breathing impediment was not discovered until Dr. Fleet returned to the operating room in response to an emergency page.
Plaintiff abandoned her complaint that the inhalation side, and exhalation side, of the machine were not adequately marked, but she contended as to another improper marking, and that there was no warning device which would have revealed that the oxygen supply had been cut off.
Without pausing to examine the alleged errors that had prevented plaintiff from presenting a Narkomed 2 to the jury, we start with the bottom line, the court’s response to counsel’s statement that it “would be helpful.” The court said,
Frankly, counsel, I think that the diagrams, the photographs, the testimony, has all been very clear and very direct, almost simplistic, if I may use that term.
Spelling this out, the jury had before it a number of photographs and diagrams, some of which were explained even at the jury rail, and which also were blown up by transparencies. Nor can we resist pointing out that plaintiff had been permitted to make a video tape of the instant machine, and had not even offered it. It is difficult to think how the statement in plaintiff’s brief, “a view was the only means available to Lori [Mrs. Meschino] to permit the jury to understand the operation of the Nar-komed 2” can have been made in good faith. Under the circumstances, we may wonder whether plaintiff’s real interest was not the machine, but the contention that she sought to present to the jury that she had been frustrated by defendants’ successful efforts “to conceal the truth,” —a claim now made several times in her brief.
Seeking to persuade the court to present this issue to the jury, plaintiff offered a memorandum of law in support of a motion, but no affidavit or other form of evidence. The facts so alleged were these. Plaintiff’s expert, Dr. Allen was apparently able to procure for plaintiff, from his own hospital, a Narkomed 2 machine substantially similar to the one used in plaintiffs operation. As a condition thereof, however, the hospital demanded that plaintiff procure the purchase of a replacement machine, and this plaintiff was prepared to do. Apparently the replacement was to be an updated version, a Narkomed 2A, of the model in question. Plaintiff claimed that when it was learned for what purpose Dr. Allen sought to buy a Narkomed 2A, defendants NAD and Bay State in bad faith thwarted the purchase, thus preventing the release of the relevant Narkomed 2 machine for proffer at trial.
Plaintiff has cited to us cases authorizing an unfavorable inference when a party procures the suppression of relevant evidence within its control. The facts here were somewhat different. Defendants had control of a replacement Narkomed 2A machine, which itself would not have been relevant. No one contended that they had control over a relevant Narkomed 2 machine, the predecessor model apparently being out of production. Plaintiff contends that by suppression of the sale of the replacement machine, defendants denied her access to evidence which was, as a practical matter, as much subject to defendants’ control as if they had owned it. These contentions, if true, would have presented the trial court with an interesting variant of the question resolved in the decided cases.
It is unnecessary to decide whether plaintiff was entitled to an instruction. Her motion, as to which she bore the burden, addressed a highly factual matter of her expert’s thwarted efforts to purchase a machine. She provided the trial court with no evidence (although she sought to examine defendant’s personnel thereon) to support her motion, even though an affidavit of her own expert ought to have been easily had. Under the circumstances, there was neither a factual basis for allowance of her motion as a whole, nor for a jury instruction, in whatever form presented.
But even if plaintiff had adequately presented her claim, this is not a case of an obvious unfavorable inference once intentional concealment had been established. Would a presentation of the machine have demonstrated the “truth” beyond what was already apparent from the detailed photographs and diagrams? For example, in response to plaintiff’s claim that there should have been an alarm specially directed to indicating an obstruction of the inhalation gases, defendants’ expert witnesses pointed out several visible, and audible, consequences that should have alerted a trained operator without the need of a separate alarm. In her brief plaintiff argues that with the machine the jury might have seen the “absurdity” of these contentions. If plaintiff’s witnesses had testified to absurdity, and needed the machine to demonstrate this, that would have been one thing. They testified to the need of an alarm, but not to need of a physical demonstration, much less to absurdity. What plaintiff may have lost was not “truth,” but an opportunity for counsel’s arguments to play upon an impressionable lay audience, unable to gauge. Defendants might well be apprehensive that possible adverse confusion, rather than truth could result from a presentation of the actual machine. The court might well not wish to engage in a mini-trial, and its sympathy with plaintiff, who had had three years to prepare, and even had a video tape which she did not use, was obviously minimal. We are not tempted to overrule its discretion.
Plaintiff further objects to the court’s exclusion of two articles published in Health Devices Magazine. She sought to introduce a December 1985 article entitled “PEEP Valves” against Boehringer, and a July 1981 article entitled “Ventilation Alarms” against NAD. The basic question was qualification under Fed.R.Evid. 803(18), whether the article had been “established as a reliable authority.” With respect to Boehringer, plaintiff did not even get off the ground. Passing the question of its sufficiency, the testimony on which she relied had been given by her expert, a Dr. Raemer, two days before in connection with another article, and was expressly limited to NAD. No do we accept plaintiffs contention of admissibility to impeach the witness then on the stand regardless of whether it had been qualified under the rule. Fed.R.Evid. 803, advisory committee’s notes, Exception (18).
We add that in any event we would not accept plaintiffs argument that the contents of all issues of a periodical may be qualified wholesale under Rule 803(18) by testimony that the magazine was highly regarded. In these days of quantified research, and pressure to publish, an article does not reach the dignity of a “reliable authority” merely because some editor, even a most reputable one, sees fit to circulate it. Physicians engaged in research may write dozens of papers during a lifetime. Mere publication cannot make them automatically reliable authority. The price of escape from cross-examination is a higher standard than “qualified,” set for live witnesses who do not. The words have a serious meaning, such as recognition of the authoritive stature of the writer, or affirmative acceptance of the article itself in the profession. For this reason we concur in the exclusion of the “Ventilation Alarms” article against NAD. Furthermore, as to NAD, plaintiff may not rely on Dr. Raemer’s testimony to predicate error on the part of the court; his testimony was never brought to its attention as providing a foundation for the “Ventilation Alarms” article.
Plaintiff further contends that NAD may not object to the introduction of this article because “NAD had admitted the authoritative nature of the article for purposes of its use at trial by listing it as a proposed trial exhibit.” We do not equate the listing of an exhibit on a pre-trial submission with a binding response to a request for admission under Fed.R.Civ.P. 36. The comparison is ill-founded; by listing the name of a witness in a pre-trial document, a proponent does not waive the right to impeach that very witness, or, indeed, to conclude not to call him. The contention is without merit.
Plaintiff also contends that she was denied the opportunity to lay a foundation for “Ventilation Alarms” through the cross-examination testimony of one of NAD’s experts. Strictly this was not cross-examination, but was making the witness hers, pro tanto. Plaintiff concedes that the witness characterized the article as “spotty,” and does not contest that the testimony on the record falls short of a foundation as authoritative. She complains that the court based its ruling on the characterization as “spotty” and then excluded a further question seeking to elicit a more favorable answer from the witness.
Upon exclusion of the question at issue, counsel proceeded immediately to another line of inquiry. Plaintiff made no offer of proof, nor does she now argue that she had any basis (in deposition testimony or otherwise) to expect that an opponent’s witness would recant his unfavorable testimony so as to provide a foundation for the article. Inasmuch as the court’s attention was directed to no grounds for reconsideration of its exclusion of plaintiff’s renewed questioning, the ruling must stand. It was tantamount to a ruling that the question at issue had been asked and answered, and such rulings will not be disturbed in the absence of an abuse of discretion. Harrington v. United States, 604 F.2d 1306 (1st Cir.1974). None has been shown.
Finally, we turn to Bay State, whose motion for a directed verdict was granted at the close of plaintiff’s case. The court, having denied NAD’s motion as a result of rejecting its claim that plaintiff had failed to show a breach of warranty, correspondingly rejected Bay State’s claim. However, it ruled in favor of Bay State on the ground that plaintiff had failed to prove that Bay State had been the seller of the machine.
With the greatest respect, we find this incomprehensible. To begin with, in support of its motion Bay State argued,
They have to demonstrate that Bay State sold that machine.... They have to introduce some evidence because the jury has nothing right now in front of them to suggest that Bay State was, in fact, the distributor.... There wasn’t a darned thing to show the element of a sale here. And that is absolutely necessary. ... Plaintiffs never took time to address the issue of a sale.... They were busy. They had their hands full. They’re trying to prove a medical case, trying to prove a case against two other product people.
I was the fortunate beneficiary of that, your Honor, because they just forgot that element of their case; but I am saying that, fortunate or unfortunate beneficiary, I am still entitled to it right now.
Plaintiff responded that the fact that Bay State had sold the system to the Lahey Clinic was alleged in the complaint, and admitted in the answer. To this Bay State replied that this had not been brought to the jury’s attention.
THE COURT: I might agree with you, Mr. Doherty [counsel for Bay State]. The jury doesn’t know that.... All the plaintiff says is: Well, they admit it in their answer and, therefore, it is deemed admitted. I don’t believe that is the case. It might be.
The discussion then turned, we might say mirabile dictu, to consideration of the principles of judicial notice, and to the claim that, after plaintiff had rested, it was late in the day. Plaintiff suggested reopening, so that the jury might be informed.
THE COURT: Why should I do that? Poor Mr. Doherty’s been sitting back there saying to himself, “I am going to lawyer this case the best way I know how.” Now you want to take away the fruit of his victory.
The matter was then adjourned to the following morning for reflection, at which time plaintiff expanded her argument on the subject of judicial notice, citing Fed.R. Evid. 201(f) and cases thereunder, and concluding that the admission of Bay State in its answer was a binding admission which the court “must instruct the jury to accept ...as conclusive_ I would state the judicial admissions absolutely eliminate the need for the admission of any evidence.... Bay State’s motion should be denied.”
THE COURT: All right. First, you say that the answers to the complaint, amended complaint, are admissions. The rule, I think, is otherwise_
So I think the gate is closed on Bay State, and I will grant their motion for directed verdict.
“Poor Mr. Doherty” had done an excellent job of “lawyering.” And where was plaintiff? Passing the fact that judicial notice, unlike answers to interrogatories, depositions, etc., referred to by the court, may be “taken at any time,” Fed.R.Evid. 201(f), what had become of Fed.R.Civ.P. 8(d)? What had become of the stipulated Pretrial Statement of Issues To Be Tried, which, consistently with the answer, conspicuously omitted any question of Bay State’s sale and commenced with whether it has breached a warranty?
We feel sure that the books could be searched in vain for authority that it is appropriate to direct a verdict against a plaintiff because she had failed to offer evidence of something unreservedly admitted in the defendant’s answer, or had not earlier, i.e., before the motion was filed, called the admission to the court’s attention —noting it at the time of argument being too late. We find it hard to believe that this could have occurred. We add that it seems as unjust as it was improper.
The battle of the wooden soldiers, or more strictly, of the unarmed soldiers, continues in this court. Bay State’s sole argument consists of a single assertion: “... there is no basis upon which the jury could have found that Bay State sold the machine to Lahey.” No mention is made of Fed.R. Civ.P. 8(d), or of the stipulated issues. Plaintiff continues to rely on Fed.R.Evid. 201(f) as to judicial notice, and adds case authority pertinent thereto, but no authority pertinent to Fed.R.Civ.P. 8(d). Nonetheless, in spite of herself, we must rule that plaintiff is correct; a verdict should not have been directed contrary to defendant’s answer.
Alternatively, in this court, as it did below, Bay State argues that plaintiff did not put in a case on the merits. While we might regard her case as thin, as confirmed by the jury’s finding against a helpless plaintiff, we need not add to the substantive reasons expressed of record by the court for denying the motion on this ground. Bay State cannot succeed here.
Finally, Bay State contends that since in the matter of warranty, it and NAD were in the same boat (which, of course, is true, see, e.g., Everett v. Bucky Warren, Inc., 376 Mass. 280, 380 N.E.2d 653, (1978); Killeen v. Harmon Grain Products, 11 Mass.App. 20, 413 N.E.2d 767 (1980)), plaintiff, having had a full trial, should be collaterally estopped by the findings and judgment in favor of NAD. For this it cites B.C.R. Transport Co., Inc. v. Fontaine, 727 F.2d 7 (1st Cir.1984) seemingly without observing that we there noted that while this is the general rule, Massachusetts adheres to principles of mutuality and, for collateral estoppel, requires identity of parties. See 727 F.2d 12, n. 2. While there are, indeed, statements to this effect in some Massachusetts opinions, it is possible that there are exceptions that B.C. R. Transport failed to realize. The burden of showing error on our part, however, is on Bay State, and, even had it been relevant, this burden is not met by its citing one district court case. We will not do counsel’s work for him.
By removing itself at the close of plaintiff’s case Bay State sought a heads-I-win, tails-you-lose situation since collateral es-toppel, in all probability, would not work offensively, i.e., plaintiff probably could not, if the directed verdict were ultimately vacated, use a finding in its favor against Bay State, but Bay State could, but for the apparent Massachusetts rule, use the finding defensively if plaintiff lost. Instead, Bay State now finds itself at the dead end of a one-way street, as it has now been litigated and determined that it cannot use the findings and judgment in favor of NAD defensively.
The judgments for North American Drager, Inc. and Boehringer Laboratories, Inc. are affirmed; the verdict and judgment in favor of Bay State Anesthesia, Inc. are vacated and a new trial ordered.
. Her husband and children, co-plaintiffs, will not be referred to.
. PEEP is an acronym for "positive end expiratory pressure”, and a PEEP valve is never intended to be used on the inhalation side. The two sides are plainly marked (although initially plaintiff claimed it could have been plainer), all of which Woitkowski testified she well knew. She was unable to account for how she could have made the mistake.
. Possible exposure of the corporate defendants commenced with the attachment of the PEEP valve, and these defendants argued that plaintiffs injury had already occurred, due to negligence of the medical defendants, in which event the acts of corporate defendants could not have been a cause. If the jury’s answers meant this, it would not affect this opinion, except to make some of it superfluous.
. The writer has seen a simple patent diagram become almost incomprehensible, and "highly ingenious,” and hence inventive, when a device that incorporated it was introduced in specie.
. "(d) Effect of Failure to Deny. Averments in a pleading to which a responsive pleading is required, other than those as to the amount of damage, are admitted when not denied in the responsive pleading.”
. Plaintiff did not charge Bay State with negligence.
. See, e.g., Brown v. R.D. Werner, 428 F.2d 375 (1st Cir.1970) (N.H. law).
.Since this reversal is on a purely technical ground, it is suggested that this is a case that might be an exception to the local district rule calling for a re-drawing, the complications of the case on the merits indicating advantages in its remaining with the same judge.