DANGEROUS CONTAMINANTS IN STORED BLOOD

DANGEROUS CONTAMINANTS IN STORED BLOOD

1267 The results, which are shown in the accompanying were first recorded after six months on the average, table, although response was usually evid...

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1267 The results, which are shown in the accompanying were first recorded after six months on the average,

table,

although response was usually evident after six to eight weeks. The factors considered in assessing results were : (1) euphoria and relief of pain ; (2) decreased stiffness of increased

joints ; (3)

ment, if any,

was

effects. The following achieved.

mobility ; (4) whether improvesustained ; and (5) absence of side-

cases

illustrate

the

improvement

The number of cases is small, the period of follow-up only one year, and there has been no radiological change ; but these preliminary findings are encouraging. is

produced by Hynson, Westcott,

Inc., Baltimore, 1, Md., London,

&

Dunning,

U.S.A.

S. BALFOUR-LYNN.

W.8.

PREVENTIVE PSYCHIATRY

SiR,—Everyone who is concerned with mental health will have been interested in Dr. Macmillan’s account {Nov. 24) of his " joint-user " service for the aftercare of patients from the mental hospital. This association would agree with much of what Dr. Macmillan says in regard to the need for social work and is only too well aware of the shortage of trained psychiatric social workers which has made it impossible for Dr. Macmillan to staff his social-work department with appropriately trained workers. However well the arrangement works in Nottingham, we would deprecate the extension to other areas which might follow his contention that social workers with a little supplementary training in psychiatry given at the hospital are adequately equipped to work on the same level as fully trained psychiatric social workers. Lectures

are

not

a

the

shortage

a

.

A man of 56 had severe pain in the right hip, which often woke him at night. Movement was limited to 20° abduction and 30° flexion. X-ray films showed gross osteo-arthritis, and operations had been recommended. A week after the second injection all pain had disappeared, and he slept all night for the first time in three years. The j oint can now move through 30° abduction and 60° flexion, and he has resumed heavy work after two years of incapacity. A man of 62 had pain and stiffness of both knees. After the seventh injection these had gone, and after the twelfth he could play golf, which he had had to give up seven years before. A woman of 73 had moderate osteo-arthritis of both knees which had been static for fifteen years despite many treatments. After 12 injections she walks a quarter of a mile with ease, though before treatment she could walk only 150 yards without pain.

’Nyloxin’

of trained psychiatric social trainee scheme which has been working for some years. Trainees, while preparing for the full university course, work on the care and aftercare of patients as salaried staff of mental hospitals under the supervision of qualified psychiatric social workers. In conclusion, we welcome all efforts to overcome the shortage of staff and to make the best use of available personnel. We do not, however, think it is in the best ultimate interests of social work in the psychiatric field to suggest that shortened and simplified training can be more than an emergency measure or provide a fully satisfactory service in an integrated mental-health scheme. Although we agree with Dr. Macmillan that the social worker must have " the right personality and outlook " this alone without specialised and supervised training in social case-work is not enough to ensure that a high standard is established and maintained. MARY A. LANE overcome

workers, has established

substitute for the

understanding

of the

problems of human relationships which only case-work under expert personal supervision can give. Further, Dr. Macmillan

does not state whether all the social workers employed by the hospital and in the local authority have a general basic socialwork training. We know from our good contact with the mental health officer of Nottingham that the joint-user service there works very well but are sure that the mentalwelfare officers themselves emphasise the need for adequate and specialised training. Indeed they, as well as ourselves, are pressing for recognition by the Ministry of Health of the need for training in the fields of mental welfare. This point is endorsed by the letter (Dec. 1) from the National Association for Mental Health.

The Mackintosh report (1951) has implemented, but this association, in

been fully endeavour to

never an

Chairman, 1, Park Crescent, London, W.l.

Association of of Psychiatric Psychiatric Social Workers.

DANGEROUS CONTAMINANTS IN STORED BLOOD

SiR,—The paper by Dr. M. G. McEntegart (Nov. 3) and instructive. I would like to two points. Dr. McEntegart remarks that the presence of small numbers of bacteria which cannot multiply in blood during storage is possibly common. The following is is both

interesting

comment

my

on one or

experience.

For many years in the Welsh regional transfusion laboratory all unused blood returned from hospital banks has been cultured. Unused blood comprises (a) bottles never opened and (b) bottles opened for compatibility tests. Pilot tubes are not used. All bottles of blood are issued sealed to hospital banks. The seal is of-’Cellophane’ incorporated into a crushed lead seal such as is used by H.M. Customs. It is impossible to open the bottle, or sample its contents, without breaking this seal. If the seal is not intact the bottle is classified as having been opened or sampled. In the period January-October, 1956, bottles of blood issued to banks totalled 20,149 and, of these, 7-9% were returned unused. Results of cultures on this- unused blood were : Bottles of Total Found blood cultured infected 4 1129 Unopened (0-35%) 468 24 (5-1%) Opened, but unused.. The roll-tube (glucose-agar) culture method has been routinely used, and to 5 ml. of culture medium 1 ml. of inoculum (blood-plasma) is added. Cultures are kept at room-temperature for 3 days, then at 37°C for 2 days. Organisms grown are referred to the department of bacteriology, Welsh National School of Medicine, for identification. Brewer’s medium was for a while jointly used but did not seem to offer advantages over the roll-tube culture method. No pathogenic organisms were cultured from unopened bottles. From 6 (1-2%) of the opened bottles pathogenic, or potentially pathogenic, bacteria were grown. These comprised coagulasepositive staphylococci from 3 bottles, while the remaining 3 yielded Escherichia coli, Bacterium aerogenes, and Streptococcus viridans. Contamination of at least some of the unused opened bottles was due, I believe, to their being opened, preparatory to transfusion, in wards or operating-theatres. Cultures have been taken from blood of unopened bottles for many years, but pathogenic bacteria have never been ....

..

..

recovered. Remnants of blood in used bottles are cultured only if referred for investigation because of transfusion reactions. Often, despite a severe reaction (e.g., rigor, chill, or collapse), culture of the remnant of donor blood proves sterile. The finding of bacteria in the remnant of donor blood which caused a reaction is, of course, not evidence that they were responsible for the reaction, for they may have been introduced at the time of, or after, transfusion. Often, for example, bottle caps are left lying about during transfusion, so collecting airborne organisms. Again, a non-sterile cap from another bottle may be used to close the bottle after transfusion. Used bottles may be returned uncapped or simply with a wool plug

1268 in the aperture. Again, organisms may be introduced by non-sterile enema syringe used to blow air into the blood bottle to speed transfusion with positive pressure. The organisms introduced will probably not cause a reaction, but they are likely to increase in the remnant of donor blood. In many severe reactions the remnants of donor bloods prove sterile on culture. Proof that an organism caused a transfusion reaction depends on recovering it from the remnant of donor blood and from the recipient’s blood. I have never known this happen, for clinicians seldom culture the recipient’s blood when febrile reactions occur. Also, in doing necropsies when death is thought to be due to transfusion, pathologists sometimes omit to take samples of blood for culture. In the two cases reported by Dr. McEntegart in which death is attributed to gram-negative bacilli recovered from remnants of donor bloods, blood for culture was not taken from the recipients either ante or post mortem. The verdict in these cases must be " not proven." Bottles of culture-media ought to be available in all blood-banks so that, should febrile reactions complicate transfusion, the clinician may immediately culture the recipient’s blood. The time to do this is during the reaction, not some hours later. a

The

source of the organisms in Dr. McEntegart’s two may, apparently, have been the plastic-cap preDr. McEntegart suggests that these servative fluid. which multiply at low temperature, may have organisms, entered the bottles through the tracks in the rubber wads left by the blood-taking needles, such entry being facilitated by contraction of the cap and cooling of the blood. This may be so, though the explanation is possibly slightly different. When the blood-taking needle is withdrawn a film of blood may be left in its track through the wad. From a film of fluid under the cap, organisms could grow along the film of blood left in the track of the blood-taking needle and so enter the bottle. Accordingly, the use of sterilised caps does not seem to be the answer, since a film of either blood or cap-preservative fluid might be left between cap and wad. This film could become contaminated either by airborne organisms which settled on the bottle cap during phlebotomy, or by organisms from the fingers of those who handled the bottle. For this reason the persistence of a film of fluid or blood on the surface of the rubber diaphragm, particularly over the perforation left by the blood-taking needle, is undesirable and, therefore, it seems best not to use plastic bottle-caps. The omission of such a cap will ensure that no film of fluid or blood will persist on the surface of the rubber wad. After blood collection the surface of cap and wad should be wiped dry with sterilised lint or towel. Plastic caps are, in any event, not always effective seals, for it is sometimes possible to remove the metal cap with plastic cap intact and replace it so. This being so, it may be impossible to tell whether or not a bottle has been opened. It is to be hoped that studies will be made to ascertain whether the organisms described by Dr. McEntegart produce endotoxin or exotoxins and, if so, their nature and antidote, if any. Apparently, the noxious effects of such organisms are produced by their toxins and not by their proliferation after introduction into the body. Experimental evidence hereon might be useful. R. J. DRUMMOND cases

Welsh

Regional Blood Transfusion Service, Rhyd Lafar, near

Medical Director.

Cardiff.

AN ERROR TRACKED TO ITS SOURCE

SIR,-In a letter which appeared in your issue of Nov. 26, 1955, Sir Selwyn Selwyn-Clarke questioned my accuracy (in an article published two weeks earlier) in ascribing to Galen the phrase " Employment is Nature’s best physician, and is essential to human happiness," but did so in the politest possible terms, saying : "Would the authors add to my debt to them actual source where this wise saying can by giving the be found ? " He has had a long time to wait for his answer, but it may gratify him to know that his doubts have given

extensive search of both secondary and original my part, and that several colleagues more learned than I (including Dr. lago Galdston, of the New York Academy of Medicine, Prof. John Fulton, of Yale, and the eminent Greek scholar, Gilbert Highet) have joined in the quest. I am obliged to Dr. K. Rawnsley of this unit for having found the answer to this problem, on p. 81 of Occupational Therapy Source Book, edited by Sidney Licht (Williams & Wilkins, Baltimore, 1948). In his foreword, to a paper first published in Boston in 1914 by Dr. Eva C. Reid, an ardent advocate of ergotherapy, Dr. Licht points out that here for the first time appears " that famous quotation attributed to Galen which has since found its way, in one form or another, into dozens of pamphlets, papers and books." Galen did not say " Employment is nature’s best physician," but he did (in the first book of De Sanitate Tuendae) write" Exercise is Nature’s physician," in a passage which was cited in Burton’s The Anatomy of Melancholy. An imperfect recollection of this passage, coloured by her own zeal for work therapy, led Dr. Reid to coin a memorable

rise to

an

sources

on

misquotation. It is a pity that Galen phrase is too eloquent to

was

not its

author; but the

be

rejected. I shall continue to use it in lectures on occupational psychiatry, but, thanks to Sir Selwyn Selwyn-Clarke’s vigilance and my colleague’s detective work, I shall in future ascribe it to its proper author, Dr. Eva Reid. Social Psychiatry Research Unit, Institute of Psychiatry,

Maudsley Hospital, London, S.E.5.

P.S.-If Sir

time, I shall

G. M. CARSTAIRS. Selwyn-Clarke knew this all the

Selwyn forgive

never

him.

PREGNANCY IN ACUTE LEUKÆMIA TREATED WITH 6-MERCAPTOPURINE

SIR,,-The association of leukaemia and pregnancy is not very uncommon. In most of the examples reported the patients had chronic leukaemia. Where pregnancy has been associated with acute leukaemia, this has usually developed during the pregnancy ; it is rarer for pregnancy to start in a patient who already has acute leukaemia. Acute leukaemia is often treated with 6-mercaptopurine (6-m.P.), which is especially damaging to embryonic directed primarily against relatively undifferentiated cells. Experiments with tadpolesand rats2 have shown the danger to the foetus of using this substance. In rats 6-M.P. induced fcetal death or shunting of growth in surviving foetuses. The foetus was most sensitive at the time of implantation-i.e., the seventh or eighth day in the first seven or eight days of gestationwhen two doses of 5 mg. per kg. induced death and resorption of half the foetuses and two doses of 10 mg. per kg. induced resorption of 90%. We have treated with 6-M.P. acute lymphatic leukaemia in a young woman who, after this treatment had been started, conceived and was later delivered of a 30-week infant which lived for two days and which was apparently normal. The 6-M.P. was given before and after conception in a dosage of 2-5 mg. per kg. daily, and as far as we could ascertain produced no ill effects on the child. The patient, a white woman aged 25, was first seen on Sept. 23, 1955, after being ill for a month with weakness, malaise, tiredness, effort dyspncea, pallor, and spontaneous

tissues, being

bruising.

On examination she

was pale, with a two-fingerenlargement of the spleen, and three-fingerbreadth enlargement of the liver. She was menstruating at this time. A blood-count showed haemoglobin 4 g. per 100 ml., packed-cell volume 8%, and white cells 8400 per c.mm. (40% polymorphs and numerous primitive cells,

breadth, smooth,

non-tender

1. Bieber, S., Bieber, R., 1954, 60, 207. 2. Thiersch, J. B. Ibid,

Hitchings, G. H. p. 220.

Ann. N.Y. Acad. Sci.