Full text of DOI:10.1007/BF03024874

1001
Review Articles
Leprosy and the
anesthesiologist
Sukanya Mitra MD,
K.K. Gombar MD
Purpose: To discuss particular aspects of leprosy (complications treatment, special population) that have implica-
tions for anesthetic management in leprous patients scheduled for surgery.
Source: MEDLINE and manual searches of relevant literature. Multiple MEDLINE searches (from 1966 onwards)
were done, using LEPROSY as a common Medical Subject Heading (MeSH). Other headings used were: anes-
thesia, surgery, cardiovascular system, respiratory system, eye, skin, nervous system, genitalia, pathology, psy-
chology and pregnancy. A large number of references were retrieved, but only 18 of them were relevant to our
topic. Others were obtained by manual search and cross referencing.
Principal findings: Leprosy, especially lepromatous leprosy, is a systemic disease, affecting many organs and sys-
tems of the body, e.g., cardiovascular (cardiac dysautonomia), respiratory (impaired cough response, nasal
obstruction), hepatobiliary (hepatitis), renal (nephritis), ocular (anesthesia), hematological (reduced red, white and
platelet count) and osseous systems (bone resorption).
Conclusion: Investigation of the systems likely to be affected by leprosy (e.g., complete hemogram, liver, lung
and kidney function tests, Valsalva response, assessment of ocular anesthesia) should form part of a preanesthetic
check up in patients with leprosy.
Objectif : Discuter des aspects particuliers de la lèpre (traitement des complications, population spéciale) ayant
des implications anesthésiques chez les patients atteints de cette maladie qui doivent subir une intervention chirur-
gicale.
Source : MEDLINE et des recherches manuelles dans la documentation appropriée. Des recherches multiples
ont été faites dans MEDLINE (à partir de 1966) en utilisant le terme LÈPRE comme principal sujet médical com-
mun. Les autres ont été : anesthésie, chirurgie, système cardiovasculaire, système respiratoire, yeux, peau, sys-
tème nerveux, organes génitaux, pathologie, psychologie et grossesse. Du grand nombre d’articles retenus,
seulement 18 d’entre eux concernaient notre recherche. On a obtenu d’autres articles par recherche manuelle
et références croisées.
Constatations principales : La lèpre, en particulier la lèpre lépromateuse, est une maladie généralisée qui
affecte de nombreux organes et systèmes de l’organisme, comme les systèmes cardiovasculaire (dysautonomie
cardiaque), respiratoire (altération du réflexe de toux, obstruction nasale), hépato-biliaire (hépatite), rénal
(
néphrite), oculaire (anesthésie), hématologique (numération érythrocytaire, leucocytaire et plaquettaire réduite)
et osseux (résorption osseuse).
Conclusion : Une exploration des systèmes pouvant être affectés par la lèpre (hémogramme complet, tests des
fonctions hépatique, pulmonaire et rénale, épreuve de Valsalva, évaluation de l’anesthésie oculaire) devrait faire
partie de l’examen préanesthésique chez les patients atteints.
From the Department of Anaesthesia, Government Medical College, Sector 32, Chandigarh-160047, India.
Address correspondence to: Dr. Sukanya Mitra, C/o Dr. D. Basu, Department of Psychiatry, PGIMER, Chandigarh-160012 (India).
Phone: + 91-172-745807; Fax: + 91-172-744401, 745078 (R); E-mail: db_sm@satyam.net.in
Accepted for publication July 2, 2000.
CAN J ANESTH 2000 / 47: 10 / pp 1001–1007

1002
CANADIAN JOURNAL OF ANESTHESIA
EPROSY is a chronic granulomatous infec-
tion caused by Mycobacterium leprae and is
onwards) were done, using LEPROSY as a common
Medical Subject Heading (MeSH), other MeSHs
included: anesthesia, surgery, cardiovascular system, res-
piratory system, eye, skin, nervous system, genitalia,
pathology, psychology, and pregnancy. A large number
of references were retrieved but only 18 were directly
relevant to our topic. Other references were obtained
by manual search and cross-referencing.
1
first of the three leading causes of severe
L
2
neuropathy in developing countries.
Lepromatous leprosy, a disease primarily of the skin and
peripheral nerves, commonly involves the superficial tis-
sues such as skin, mucosa of the upper respiratory tract,
subcutaneous portions of the nerves and the anterior
2
chamber of the eye. Nerve affliction in leprosy results
in motor paralysis and sensory loss and is attributable to
Epidemiology and clinical features
3
the affinity of the M. leprae for Schwann cells. It also
Leprosy is named after the Greek word ‘Leper’, which
means ‘scaly’. Modern day leprosy dates from 1873
when Hansen of Norway discovered M.leprae. During
the middle ages, leprosy was widespread in almost all
parts of the world. Thereafter, it declined slowly in
European countries. For many years there was no effec-
tive remedy for leprosy. The introduction of sulphone
drugs in the treatment of leprosy in 1943 marked the
beginning of a new era in the field of leprosy.
4
affects the autonomic nervous system, bones, liver,
5–9
kidney and endocrine glands.
However, anesthetic implications in patients with
leprosy have not been well explored. Search of the
medical literature over the past 20 yr revealed only
10,11
two references on the anesthetic aspects of leprosy,
whereas a large number of such patients are being
operated upon for corrective and rehabilitative proce-
12,13
dures under different kinds of anesthesia.
This
The disease has a world-wide distribution but there
is no uniformity in distribution of its various clinical
forms. The bulk of cases occur in South East Asia,
paucity of the anesthesia literature on leprosy is sur-
prising, given that leprosy is now understood as a sys-
temic disease affecting many organs and systems that
may have direct or indirect bearing for an anesthesiol-
ogist dealing with such cases. It is difficult to deter-
mine whether this is a reflection of western literature
bias or the clinical impact of leprosy to the anesthesi-
ologist is less than anticipated from theoretical con-
cerns. This review aims at discussing the possible
complications associated in patients with leprosy and
their implications in the field of anesthesia.
1
Africa and the Western Pacific. In northern Europe,
Hawaii, Japan, the continent of America and Venezuela,
there has been a progressive “natural decline” in the
1
incidence of indigenous leprosy.
Leprosy has a global prevalence of 5.7 per 10,000
population. In India, the prevalence rate of leprosy is
2.4 per 1,000 population. India accounts for about
one third of the leprosy cases in the world and has by
far the greatest number of cases among individual
1
countries.
Method
Table I shows the clinical features and the various
factors influencing the pathogenesis of leprosy. We will
review the various systemic involvements in leprosy
along with their potential implications in the anesthet-
ic management of patients with leprosy.
MEDLINE and manual searches of relevant literature
were done. Multiple MEDLINE searches (from 1966
TABLE I Clinical features of leprosy and factors influencing
pathogenesis
Cardiovascular system
Leprosy is a systemic disease affecting multiple organs
during the bacillemic phase which occurs at one stage
of the disease. Involvement of the cardiovascular sys-
tem in leprosy has been reported by several
1
. Leprosy is characterized by one or more of the following cardi-
nal features.
a) Hypopigmented patches.
b) Partial or total loss of cutaneous sensation in the affected
areas (earliest sensation affected being light touch).
c) Presence of thickened nerves.
14–24
authors.
Mathur et al. reported cases of congestive
16
cardiac failure in leprosy patients. The electrocardio-
graphic changes in patients with lepra reaction showed
ST and T wave changes in 16.66%, bundle branch
block in 0.7%, extrasystoles in 3.7% and increased Q-
d) Presence of acid fast bacilli in the skin or nasal smears.
The clinical diagnosis is not made unless at least one of the
cardinal signs is present.
2. Factors influencing pathogenesis.
15,17,18
Tc intervals in 44%.
The last feature suggests an
a) The degree to which cell mediated immunity is expressed.
b) The extent of bacillary spread and multiplication.
c) The appearance of immunological reaction: lepra reaction,
type I and type II.
increase in the rate of diastolic depolarisation.
Autonomic function is affected to varying degrees
and the important manifestations of such dysfunction
include orthostatic hypotension, baroreflex dysfunc-
d) The development of nerve damage and its complications.

Mitra & Gombar: LEPROSY
1003
tion and postprandial hypotension.2,19–24 Involvement
of the sympathetic nerves is manifested earlier than
the cases and patients failed to increase Peak
Expiratory Flow Rate (PEFR) following adrenaline
injection, presumably due to hyporeactivity of pul-
monary beta-2 receptors in leprosy.
2
0
that of the parasympathetic nerves. The cause for
this has been attributed to infiltration of dorsal root
3
ganglia and sympathetic chain by the acid fast bacilli.
Lepromatous and borderline patients also have con-
siderably higher prevalence of tachycardia and
Hepatobiliary system
The liver is frequently involved in advanced lepromatous
2
0
2 8
arrhythmias due to cardiac dysautonomia.
leprosy as a result of bacteremia. Bungeler, in the pre-
Patients with lepromatous leprosy have elevated
high density lipoprotein cholesterol which acts as a
protective factor against ischemic heart disease, but
recent studies show that there are changes in the small
blood vessels feeding the peripheral nerves distributed
around the arteries in the epicardial adipose tissues
resulting in paralytic arterial changes promoting
sulphone era found hepatic changes in 251 out of 285
lepromatous patients. Hepatic involvement is much less
common in tuberculoid type though small granulomata
have been described.2 9 The basis of the lesion described
is multiple small lepromata in the periportal connective
tissue. The lepra reactions might he associated with
hepatitis along with Kupffer cell hyperplasia.
2
2
30
ischemic cardiac disease.
Nigam et al. studied 50 cases of leprosy for clini-
Studies in patients with lepromatous leprosy show
impairment of responses to the Valsalva maneuvre,
heart rate and blood pressure response to standing.
These patients have hyporeactive blood pressure and
co-biochemical and histological features pertaining to
hepatobiliary system involvement. The specific granu-
lomatous lesions suggestive of leprous hepatitis were
mainly seen in lepromatous leprosy (40%), whereas,
granulomata in liver were seen in all types of leprosy
(70%). Some of the hepatic lesions progressed to stel-
late fibrosis and early cirrhotic changes (40%). Most
importantly, however, functional derangement was the
main feature in lepromatous cases irrespective of the
extent and duration of the disease. The uniform eleva-
tion of total serum proteins was mainly due to increase
in serum globulin with reversed albumin-globulin
(A/G) ratio, indicating deranged hepatocyte function
and hyperplasia of reticuloendothelial cells. The find-
ings of deranged A/G ratio were confirmed in
patients with lepromatous leprosy and those with lepra
2
3
heart rate response to standing and Valsalva maneu-
3
vre. Jain et al. reported abnormal Valsalva response in
1
9
8
% of leprosy patients. The sympathetic function of
the heart is also affected, as evidenced by absence of
blood pressure response of standing, sustained hand
grip, and heart rate response to single large dose of
intravenous atropine. Impairment of vagal function is
evidenced by absence of reflex bradycardia after
Valsalva maneuvre and loss of heart rate variability to
deep breathing. All these are more pronounced in
3,24
patients with longer duration of disease.
3
1
Respiratory system
reaction subsequently.
Hyperbilirubinemia was
The respiratory system in leprosy patients is affected.
Anatomical involvement of the respiratory tract
includes areas frequently dealt with by anesthesiolo-
gists, i.e. nose, larynx and pharynx. The nose is a
major site of lepromatous infiltration and the largest
source of output of leprosy bacilli. Involvement of the
pharynx in lepromatous leprosy develops later than in
the nose, and is thought to originate not from direct
extension from the nose but by hematogenous or lym-
phatic spread. The most affected part tends to be the
uvula. In the larynx, the site of predilection is the free
margin of the epiglottis, which is the first part to be
affected. Involvement of the vocal cords is a late but
possible development.
chiefly seen in lepromatous leprosy.
Renal involvement
Renal involvement in leprosy is frequent and glomeru-
lonephritis of all types, interstitial nephritis and arnyloi-
dosis have all been reported mainly in lepromatous
32–35
36
leprosy.
Grover et al. performed kidney biopsy in
54 cases of leprosy, of which 45 were of lepromatous,
four of tuberculoid arid five of borderline types. A wide
range of renal pathology was found. Membranous
glomerulonephritis (31.5%) was the commonest type of
glomerular lesion, followed by interstitial nephritis and
diffuse proliferative glomerulonephritis (22.2% each).
Renal lesions were seen ire nonlepromatous types of
leprosy as well. Clinically, of the 54 cases, four devel-
oped nephrotic syndrome, two presented as acute renal
failure, 11 cases had microscopic hematuria and others
had asymptomatic proteinuria. Blood urea was raised in
nine cases (all the cases with amyloidosis, interstitial
nephritis and rapidly progressive glomerulonephritis).
2
5
Leprous patients have impaired respiratory func-
tion tests, breath holding time and response to
4
cough. These have been postulated to be the result to
compromised pulmonary chemosensitive function due
2
6,27
to blockade of vagus and sympathetic plexus.
2
7
Respiratory dysautonomia was observed in 48% of

1004
CANADIAN JOURNAL OF ANESTHESIA
Rapidly progressive glomerulonephritis, presenting as
acute renal failure, has been reported in lepromatous
leprosy previously.
drugs currently used for multi-drug therapy for leprosy
are rifampicin and clofazimine. Rifampicin, other than
abnormal liver enzymes levels, may produce some inter-
mittent toxic syndromes, e.g. flu syndrome, shock syn-
37
4
6
Involvement of other organs and systems
drome, and rarely thrombocytopenic purpura.
EYES: The primary ocular lesions of leprosy (those
directly due to the bacillus) affect all parts of the ante-
rior chamber of the eye and, in advanced lepromatous
disease, almost all patients are affected. Secondary com-
plications follow damage to the fifth and seventh cranial
nerves, causing anesthesia and ulceration, lagophthal-
mos, exposure keratitis and, finally, blindness. They may
Pregnancy-related aspects
Pregnancy has long been associated with the first pre-
sentation of clinical leprosy or aggravation of the exist-
ing disease. Pregnancy is also known to be a
precipitating factor for both Type I and Type II reac-
tion states of leprosy (these are acute inflammatory
episodes of allergic nature: Type I is due to delayed
hypersensitivity and is the main cause of nerve damage
in leprosy, whereas Type II refers to erythema nodosum
leprosum). Sometimes, emergency Cesarean section has
38
be seen in any form of leprosy. A recent study of newly
diagnosed leprosy patients in Nepal found 37% preva-
lence of eye lesions; 4.6% had sight-threatening lesions
such as lagophthalmos, iris involvement and corneal
3
9
4 7
anesthesia. Blindness is usually a sequel to corneal
lesions (following corneal anesthesia and lagophthal-
to be performed due to card iotocographic pathology
or due to other complications such as erythema
nodosum leprosum (ENL) or leprous neuropathy.
4
0
4 8
mos) and complicated cataract.
1
0
BONES: Chronic osteomyelitis is a feature of the late
stage of lepromatous leprosy. It is due to invasion and
destruction of the bony trabeculae by lepromatous
granulation tissue which is subsequently followed by
Hempenstall and Holland, in the only published case
report of anesthesia for emergency Cesarean section in
a lepromatous leprosy patient, described many such
problems encountered in such cases. During pregnancy,
since clofazimine and rifampicin are contraindicated,
their patient was put only on dapsone to which she
developed a reaction with fever, hemolytic anemia and
neurotropenia, leading to withdrawal of dapsone. Later,
she developed pulmonary edema and still later, sudden
fetal distress necessitating emergency section under
regional anesthesia with combined spinal-extradural
block. Their patient also had a low platelet count and a
raised activated partial thromboplastin time though
other tests of coagulation profile were normal.
41,42
fibrosis.
There is also osteoporosis and resorption
of digits, a process that is exacerbated by chronic vas-
culitis. Infiltration of lepromatous granulation tissue
also causes destruction of nasal cartilage and bone. In
advanced tuberculoid leprosy, chronic nonspecific
osteitis may necessitate amputation.
SKELETAL MUSCLE: Skeletal myositis may be
encountered in lepromatous leprosy. This is an inter-
stitial myositis which may produce painful nodules
during leprae reactions. Superficial muscles of the
4
3
limbs are commonly involved. Simple neuropathic
disuse atrophy of muscles is frequently seen.
Implications for Anesthesia
ENDOCRINE GLANDS: Patients with leprosy may pre-
sent with orchitis and gynecomastia. These patients
have decreased plasma concentration of testosterone
and raised levels of gonadotrophin. Orchitis is a com-
mon complication of lepromatous infection.
OTHERS (AMYLOID): Secondary arnyloidosis is a rec-
ognized complication of lepromatous leprosy. It com-
monly affects the kidneys resulting in the mortality of
The above review shows how leprosy affects many sys-
tems of the body which are of potential relevance to the
anesthesiologist (Table II). Given this background, it is
surprising to find the lack of relevant literature (e.g. dif-
ficult intubation or perioperative anesthetic problem in
leprous patients). In fact, only two recent publications
9
10,11
have dealt with this issue directly.
The reasons for
this lack are unclear. In any case, the basic clinicopatho-
logical findings as reported in the literature reviewed
above should not be ignored.
5
0% patients within one year. In non-lepromatous
patients amyloidosis may occur as a complication of
4
4
severe ulceration.
Although most of the pronounced systemic changes
are seen best in lepromatous leprosy (and hence this
type of leprosy deserves the greatest concern for anes-
thesiologists), it must be emphasized that no particular
subtype of leprosy is immune to these changes. Some of
these (e.g. cardiovascular) have been associated with a
longer duration of disease, but some may be seen in
even new-onset leprosy (e.g. ocular changes). Drug
Treatment-related aspects
Dapsone (diphenyl sulphone), a folate antagonist, has
45
been used to control leprosy for more than 30 yr. Its
important adverse effects include hemolytic anemia,
methemoglobinemia, agranulocytosis, hepatitis, periph-
eral neuropathy, psychosis and lepra-reaction. Other

Mitra & Gombar: LEPROSY
1005
TABLE II Systemic changes in leprosy: implications for anesthesia and a proposed checklist of investigations
System
Changes
Implications
Proposed investigations
Cardiovascular
Impaired autonomic nervous
function (cardiac dysautonomia);
impaired myocardial contractility;
cardiac ischemia
•
Cardiorespiratory arrest;
Cardiovascular assessment,
focusing especially on
cardiovascular autonomic
function, e.g. Valsalva
sudden death may occur due
to failure of the heart to
compensate for expected
changes due to intubation and
extubation and various drugs.
Hyporeactive heart rate and
blood pressure response
Dysrhythmias
Delayed postoperative
recovery
Risk of infection
Risk of aspiration
Difficult intubation
response, ECG changes to
Respiration and blood pressure
changes to posture and
hyperventilation.
•
•
•
Respiratory
•
•
Decreased cough response;
respiratory dysautonomia
Nasal obstruction; vocal cord
involvement
•
•
•
Pulmonary function tests
Indirect laryngoscopy
Respiratory arrhythmia
during sleep
•
•
•
•
•
•
Prophylaxis for aspiration
Airway assessment
Impaired metabolism of drugs
during anesthesia
Hepatobiliary
Renal
Hepatitis (leprous or drug-
induced); reversed A/G ratio
Various types of glomerulo-
nephritis; interstitial nephritis;
renal amyloidosis
Liver function tests including
A/G ratio.
Renal function profile
•
Decreased renal clearance of
drugs during anesthesia
Ocular
Anesthesia and analgesia
Trauma and infection during
anesthesia and surgery
Ophthalmologic examination
Hematological
Anemia; methemoglobinemia;
agranulocytosis;
•
Decreased oxygen carrying
capacity;
Complete hemogram and
coagulogram
thrombocytopenia
•
•
•
impaired clotting;
postoperative infection.
Pathological fracture during
positioning
Bones
•
•
Osteomyelitis
Bone resorption
•
History and relevant
radiological investigation
Nasal patency
Neurological assessment
Electromyography
•
Difficult nasal intubation
•
•
•
Neurological
Nerve damage and sexual
impotence
Neurological deficit following
nerve blocks, regional
anesthesia.
treatment in leprosy is an important consideration,
especially for hematological side-effects, and a detailed
drug history must always be obtained while contem-
plating anesthesia in these patients. Documentation of
nerve damage and sexual impotence should be made
prior to regional anesthesia. Spinal and epidural block-
age should be used cautiously in patients with long
standing disease as autonomic nervous system involve-
ment may cause profound hypotension and problemat-
ic urinary retention.
vant before taking up such patients for surgery and
anesthesia.
A proposed checklist (Table II ) of investigations in
patients with leprosy, especially of the lepromatous
type, is suggested before planning surgical procedures
in such patients. While not exhaustive, these should
serve as guidelines to make the anesthesiologist aware
of the potential challenges to be faced while dealing
with the patient during and after surgery. However, it
must be noted that these recommendations are based
on review of the literature and not on controlled stud-
ies. Thus, the level of certainty regarding the valida-
tion status of these recommendations is low, and these
may currently be accepted as Level 5 evidence (i.e.
opinion of reviewer is sufficient).
Leprosy is a highly infectious disease of low patho-
4
9
genicity. The nasal mucosa of lepromatous cases har-
bour millions of M.leprae which are discharged during
sneezing. The bacilli can also exit through ulcerated or
broken skin of infected patients. These facts may leave
implications for the anesthesiologists when such
patients come for surgery or for treatment in intensive
care units. Fortunately, it has been found that local
application of rifampicin drops or spray destroys most of
Conclusion
Leprosy is a common disease in India and some other
parts of the world (e.g. Africa, some Asian countries). It
is likely that these patients may require anesthesia ser-
50,51
the bacilli within a short period.
This may be rele-

1006
CANADIAN JOURNAL OF ANESTHESIA
vices for various reasons, including surgical interven-
tions. With increased immigration and global travel, lep-
rosy is a disease more likely than before to be
encountered in parts of the world where it is uncommon
today. The suggested guidelines may help in the safe
conduct of anesthesia in these cases. However, empirical
testing of these needs to be done in future studies.
17 Zawar PB, Chawhan RN, Swami RM.
Electrocardiographic changes in lepra reaction. Lepr
India 1983; 55: 197–9.
18 Cardiovascular status in leprosy. In: Highlights of
Leprosy Research. ICMR Bulletin 1982; 12: 3.
19 Jain SK, Viswanathan R, Chakravarty AK. Circulatory
reflexes in leprosy. Indian J Med Res 1965; 53: 8–15.
20 Katoch K, Ramu G. Cardiovascular involvement in lep-
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