A randomized comparison of indwelling pleural catheter and doxycycline pleurodesis in the management of malignant pleural effusions
A Randomized Comparison of Indwelling Pleural Catheter and Doxycycline Pleurodesis in the Management of Malignant Pleural Effusions Joe B. Putnam, Jr., BACKGROUND. The purpose of this study was to compare the effectiveness and Richard W. Light,
safety of a chronic indwelling pleural catheter with doxycycline pleurodesis via
R. Michael Rodriguez,
tube thoracostomy in the treatment of patients with recurrent symptomatic ma-
Ronald Ponn, Jemi Olak, METHODS. In this multi-institutional study conducted between March 1994 and Jeffrey S. Pollak,
February 1997, 144 patients (61 men and 83 women) were randomized in a 2:1
Robert B. Lee,
distribution to either an indwelling pleural catheter or doxycycline pleurodesis. D. Keith Payne,
Patients receiving the indwelling catheter drained their effusions via vacuum
Geoff Graeber,
bottles every other day or as needed for relief of dyspnea. Kevin L. Kovitz, RESULTS. The median hospitalization time was 1.0 day for the catheter group and 6.5 days for the doxycycline group. The degree of symptomatic improvement in
1 Department of Thoracic and Cardiovascular Sur-
dyspnea and the quality of life was comparable in each group. Six of 28 patients
gery, the University of Texas M. D. Anderson Can-cer Center, Houston, Texas.
who received doxycycline (21%) had a late recurrence of pleural effusion, whereas
12 of 91 patients who had an indwelling catheter (13%) had a late recurrence of
Department of Medicine, Saint Thomas Hospital
and Vanderbilt University, Nashville, Tennessee.
their effusions or a blockage of their catheter after the initially successful treatment
(P ϭ 0.446). Of the 91 patients sent home with the pleural catheter, 42 (46%)
Department of Surgery, Hospital of Saint Raphael
and Yale University, New Haven, Connecticut.
achieved spontaneous pleurodesis at a median of 26.5 days. CONCLUSIONS.
A chronic indwelling pleural catheter is an effective treatment for
Department of Surgery, University of Chicago,
the management of patients with symptomatic, recurrent, malignant pleural effu-
sions. When compared with doxycycline pleurodesis via tube thoracostomy, the
Department of Radiology, Yale University School
of Medicine, New Haven, Connecticut.
pleural catheter requires a shorter hospitalization and can be placed and managed
on an outpatient basis. Cancer 1999;86:1992–9.
Department of Surgery, Emory University, At-
7 Department of Medicine, Louisiana State Univer-sity Medical Center, Shreveport, Louisiana. KEYWORDS: malignant pleural effusion, pleurodesis, indwelling catheter.
8 Department of Surgery, West Virginia University,Morgantown, West Virginia. Management of the patient with a symptomatic malignant pleural
9 Department of Medicine, Tulane University, New
effusion (MPE) remains problematic. The current management
of MPE entails the production of a pleurodesis (fusion of the visceraland parietal pleura). This can be done by instilling a sclerosing agent
Presented in part at the American College of Chest
through a chest tube or via talc insufflation at thoracoscopy.1 These
Physicians Annual Meeting, New Orleans, Louisi-ana, October 1997.
treatments require the insertion of a chest tube and several days ofhospitalization.
Supported by Denver Biomaterials, Denver, Colorado.
An alternative treatment is intermittent or continuous drainage of
Drs. Richard Light, R. Michael Rodriguez, and Jo-
the pleural fluid with a chronic indwelling pleural catheter. There
seph Putnam own shares of stock in Surgimedics,which is a parent company of Denver Biomaterials.
have been several other reports with small numbers of patients thatdemonstrated the utility of an indwelling drainage catheter in pa-
Address for reprints: Richard W. Light, M.D., Directorof Pulmonary Disease Program, Saint Thomas Hos-
tients with MPE.2–7 Based on these preliminary reports, a pleural
pital, P.O. Box 380, 4220 Harding Road, Nashville, TN
catheter was developed that could be chronically implanted in the
pleural space for the treatment of MPE.
Received June 7, 1999; accepted July 2, 1999.
The purpose of this randomized study was to compare the effec-
Indwelling Catheter for Malignant Effusions/Putnam et al. FIGURE 1. The Pleurx indwelling pleural catheter is shown. The valve on the distal end of the pleural catheter is closed except when the access tip of the drainage
tiveness of the indwelling pleural catheter with tube
films, 3) blunting of the costophrenic angles, 4) mod-
thoracostomy and doxycycline pleurodesis in the
erate effusion fluid between the costophrenic angle
management of patients with recurrent, symptomatic
and hilar level, 5) large effusion fluid above hilar level
MPE. We hypothesized that use of the newly devel-
but not completely opacified, and 6) complete opaci-
oped pleural catheter compared with doxycycline
pleurodesis would decrease hospital stay and result ina comparable improvement in quality of life without
Patient Selection
Patients were required to have a malignancy with atleast a moderate sized pleural effusion and dyspnea
MATERIALS AND METHODS
relieved after therapeutic thoracentesis. Exclusion cri-
A prospective, randomized, multicenter study was
teria included chylothorax, previous lobectomy or
conducted comparing the treatment of symptomatic,
pneumonectomy on the affected side, previous at-
recurrent MPE with an indwelling pleural silicone
tempts at pleurodesis, autoimmunodeficiency syn-
catheter (Pleurx; Surgimedics, Denver Biomaterials,
drome, Karnofsky performance status score Ͻ 50,8
Denver, CO) to doxycycline pleurodesis via tube tho-
bilateral moderate or larger pleural effusions, multiple
loculations, mediastinal shift toward the side of theeffusion, pleural infection, or abnormal coagulation
Description of Indwelling Pleural Catheter Apparatus
profile. Study participants were not allowed to receive
The apparatus for the indwelling pleural catheter con-
concurrent intrapleural chemotherapy or radiation
sists of the catheter and a drainage line with an access
therapy to the ipsilateral chest. Patients were allowed
tip matched to the catheter (Fig. 1). The pleural cath-
to receive systemic chemotherapy or mediastinal ra-
eter is a 15.5 Fr. silicone rubber catheter, 66 cm in
length, with fenestrations along the proximal 24 cm. On the distal end is a valve designed to enhance thesafety of the product. The valve prevents fluid or air
Study Design
from passing in either direction through the catheter
After a written informed consent was obtained, pa-
unless the catheter is accessed with the matched
tients were randomized via consecutively numbered
drainage line. The pleural fluid is drained by inserting
envelopes to receive the indwelling catheter or the
the access tip of the drainage line into the valve of the
doxycycline pleurodesis. A 2:1 distribution was used
catheter and then draining the fluid via an external
with the greater number of patients receiving the in-
dwelling catheter. Each center was provided a set ofconsecutively numbered envelopes containing the
Radiologic Evaluation
treatment assignment that was generated from a table
Pleural effusions were semiquantitated as follows: 1)
no effusion, 2) effusions only detected on decubitus
The patient’s disability was assessed by using the
CANCER November 15, 1999 / Volume 86 / Number 10
modified Borg scale score for dyspnea (scale, 0 –10) at
patient assessed the most severe and average levels of
rest and after walking 100 feet on the level.9 A quality-
pain during the previous 24 hours using a visual ana-
of-life questionnaire, the dyspnea component of
Guyatt Chronic Respiratory Questionnaire (CRQ), also
The chest tube was removed when the 24-hour
drainage fell below 100 mL. If the 24-hour drainagevolume did not fall below 100 mL within 4 days, then
Protocol for Catheter Patients
doxycycline was readministered. If the drainage re-
The Seldinger technique11 was used to insert the wire
mained above 100 mL/24 hours for 4 days after the
into the pleural effusion at approximately the anterior
second injection, then the patient was considered to
axillary line. A 1–2 cm incision was made over the wire.
have experienced treatment failure. All patients who
A chest wall tunnel (5– 8 cm in length) was created
were thought to be initial treatment successes had
with a counter incision. The catheter was pulled
chest radiographs within 8 hours of chest tube re-
through the tunnel and out next to the wire. After
moval and had their dyspnea reassessed.
dilation of the wire tract with a Teflon “peel-away”sheath, the indwelling catheter was inserted into thechest. The counter incision was closed primarily, and
Follow-Up Procedures
the catheter was secured to the skin medially with a
Follow-up clinic visits were scheduled at 4 weeks, 8
weeks, and 12 weeks. For the first 12 weeks, patients
After catheter insertion, up to 1500 mL of pleural
were called on a weekly interval if a clinic visit was not
fluid initially were drained. If the effusion was not
scheduled. After the initial 12 weeks, patients were
drained completely, as evaluated with the chest radio-
called on every other week. Chest radiographs, interval
graphs, then another 1000 mL of fluid were drained
history, and physical examination were obtained at
every 8 hours until drainage was complete. If the pa-
each clinic visit. The patient’s dyspnea was quanti-
tient was found to have a trapped lung, then the
tated with a Borg score, and their quality of life was
catheter was left in place. The patient was considered
assessed by the Guyatt CRQ. Pleural catheter patients
for discharge after a chest radiograph demonstrated
were followed until either death or catheter removal.
the absence of fluid. Prior to discharge, the patient’s
Pleural catheter patients were advised to return for a
dyspnea was rerated using the Borg scale. The patient
follow-up visit sooner if there was no pleural fluid
assessed the most severe and average levels of discom-
drainage on 3 consecutive occasions. If pleurodesis
fort during the 24 hours after catheter insertion using
had occurred, then the catheter was removed. After
discharge, the patients were said to have failed treat-
Prior to discharge, the patients and/or their care
ment if the effusion was large (Grade 5) or if the
givers were provided with detailed oral and writteninstruction for draining the pleural fluid. Patients were
effusion was moderate (Grade 4) and the patient was
instructed to drain the pleural fluid completely every
Protocol for Doxycycline Pleurodesis Patients Statistical Analysis
After tube thoracostomy (chest tube size was at the
The data are presented as the mean Ϯ standard devi-
discretion of the investigator) was performed, the
ation when the data are distributed normally and as
pleural fluid was drained. If the underlying lung failed
the median with the range when the data are not
to expand by 72 hours, then the patient was assumed
distributed normally. The characteristics of the pa-
to have a trapped lung, and chemical pleurodesis was
tients in the two groups (pleural catheter or doxycy-
not attempted. If the lung expanded and the drainage
cline pleurodesis) were compared by using unpaired t
was Ͻ150 mL/24 hours, then doxycycline (500 mg in a
tests. If the data failed the normality test, then the
total volume of 50 mL) was injected into the pleural
results were compared by using the nonparametric
space. If the chest tube had been in place for 4 days
Mann–Whitney rank-sum test (SigmaStat; Jandel Sci-
and the drainage was Ͻ300 mL over the previous 24
entific, San Rafael, CA). The chi-square test was used
hours, then doxycycline was injected. If the drainage
for statistical analysis when proportions in the treat-
exceeded 300 mL during Day 4, then chemical pleu-
ment groups were compared. Differences in the treat-
ment results were considered significant when P Ͻ
After doxycycline injection, the chest tube was
0.05. When the treatment results were analyzed, only
clamped for 4 hours, and the patient was rotated.
the patients who received the appropriate treatment
Suction was then reapplied. The following day, the
without protocol violation were included. Indwelling Catheter for Malignant Effusions/Putnam et al. Comparison of Demographics of the Patients in the Two Treatment Treatment Results from the Two Treatment Groups Doxycycline Doxycycline Characteristic catheter pleurodesis Characteristic Pleural catheter pleurodesis
a P Ͻ 0.001 compared with pleural catheter group.
justified in the protocol. The initial treatment was
unsuccessful in 13 of the remaining 41 patients (32%)
for the following reasons: Ͼ300 mL of fluid/24 hours
after 4 days of tube drainage (n ϭ 7 patients), incom-
plete drainage (n ϭ 3 patients), trapped lung (n ϭ 1
patient), recurrent large effusion immediately afterchest tube removal (n ϭ 1 patient), and death 3 daysafter chest tube insertion (n ϭ 1 patient). The median
chest tube size was 28 Fr (range, 14 –36 Fr).
One hundred forty-four patients were enrolled in thestudy at 11 institutions. Forty-five patients (31.2%)
Indwelling Pleural Catheter Patients
were randomized to the doxycycline arm, and 99 pa-
Three of the 99 patients who were randomized to the
tients (68.8%) were randomized to the indwelling
indwelling catheter group did not have the catheter
inserted. In 2 patients, the radiographs were misinter-
The demographics of the patients assigned to the
preted. The third patient had a loculated effusion. Two
two treatment groups were similar (Table 1). The most
of 96 patients who received the indwelling catheter
common primary malignancy in each group was lung,
were withdrawn because of protocol violations: One
and the second most common was breast (Table 1).
patient had a concomitant chest tube, and the other
The mean initial size of the effusions in the indwelling
had a chylothorax. In the remaining 94 patients, the
catheter group was significantly larger (P ϭ 0.031)
chest radiograph revealed at most a small effusion in
than in the doxycycline pleurodesis group. The mean
91 patients (97%). A multiloculated effusion, a hemo-
pleural fluid glucose and LDH levels and the percent-
thorax, and a pleural infection each occurred in 1
age with positive cytology were similar in both groups. Doxycycline Pleurodesis Patients Hospitalization Times
Two of the 45 patients who were randomized to the
The median hospitalization time necessary for the
doxycycline pleurodesis group did not receive chest
treatment of pleural effusions was significantly less in
tubes. One patient was withdrawn from the study
the pleural catheter group (median, 1.0 day) than in
when his primary care physician elected to treat with
the doxycycline pleurodesis group (median, 6.5 days;
radiotherapy rather than a chest tube. A second pa-
P Ͻ 0.001) (Table 2). This time was the interval from
tient withdrew from the study after he learned that he
randomization until the patients were eligible for dis-
was randomized to receive a chest tube rather than an
charge based on their response to treatment and its
indwelling catheter. Of the remaining 43 patients, 2
complications. The study was designed to have all
were withdrawn due to protocol violations. One pa-
indwelling catheter patients discharged after being
tient was mistakenly given talc rather than doxycy-
observed for 16 –24 hours in the hospital after inser-
cline intrapleurally, whereas a second patient received
tion of the catheter. Forty of the indwelling catheter
a second administration of doxycycline before it was
patients were discharged within 24 hours. Hospitaliza-
CANCER November 15, 1999 / Volume 86 / Number 10 TABLE 3 Comparison of Initial Borg and Guyatt Scores and Mean Improvements from the Initial Score in the Two Treatment Groupsa Borg score rest Borg score exercise Guyatt CRQ Time group Catheter Doxycycline Catheter Doxycycline Catheter Doxycycline
CRQ: Chronic Respiratory Questionnaire. a The numbers in parentheses refer to the number of patients evaluated at each time period. All numbers are the mean Ϯ standard deviation of differences from initial values. b P ϭ 0.050.
tions were prolonged in the other patients for therapy
mented recurrence at another medical center, and it
was not clear whether the catheter was occluded. Spontaneous Pleurodesis Spontaneous pleurodesis occurred in 42 of the 91 pa- Changes in Quality of Life
tients (46%) who were treated successfully with the
The initial mean values for the resting and exercise
pleural catheter. The median time to pleurodesis was
Borg score and the dyspnea component of the Guyatt
29 days (range, 8 –223 days). The median amount of
CRQ were similar among the two groups (Table 3).
fluid drained in the first week as an outpatient was
When the Borg scores were re-evaluated after the ini-
significantly less in the group that achieved pleurode-
tial treatment was completed, the mean degree of
sis than in the group that did not (460 mL vs. 1275 mL;
improvement both at rest and after exercise were
P Ͻ 0.05). Overall, the median amount of fluid drained
nearly identical among the two treatment groups. The
each week ranged from 500 mL to 1500 mL, with the
Borg scores postexercise at 30 days, 60 days, and 90
maximum Ͻ 4000 mL/week. Patients who achieved a
days after the initial treatment showed a trend toward
pleurodesis tended to have a gradual diminution in
greater improvement in the indwelling catheter group,
which was statistically significant at 30 days (P ϭ 0.05)(Table 3). The improvements in the Guyatt CRQ scores
Late Failures
were similar 30 days, 60 days, and 90 days posttreat-
In the doxycycline group, late failure was defined as
recurrence of the effusion after an initially successfulpleurodesis, whereas, in the pleural catheter group,late failure was defined as the recurrence of the effu-
Concomitant Therapy
sion after its initial successful control. The late failure
At the time that the patients were enrolled in the
rate was comparable in the doxycycline group (6 of 28
study, 25 of the 135 evaluable patients were receiving
patients; 21%) and in the indwelling catheter group
chemotherapy. There was no significant relation be-
(12 of 91 patients; 13%) (chi-square ϭ 0.23; P ϭ 0.631).
tween the results from the doxycycline group or the
The 6 late failures in the doxycycline group were all
indwelling catheter group and whether or not the pa-
documented by X-ray and by thoracentesis in four. All
tients were receiving chemotherapy (Table 4). At 30
6 recurrences occurred by 30 days. In the indwelling
days postrandomization, an additional 3 patients in
catheter group, the recurrence was due to loculations
the doxycycline group and 13 patients in the indwell-
resulting in incomplete drainage of the pleural space
ing catheter group were receiving chemotherapy.
in 7 patients. The catheter was repositioned in 1 of
Again, there was no relation between chemotherapy
these patients, who subsequently developed a spon-
and the results from the doxycycline group or the
taneous pleurodesis. The recurrence occurred after a
indwelling catheter group. There was no relation be-
successful, spontaneous pleurodesis in 2 patients. In 2
tween the occurrence of a spontaneous pleurodesis
patients, the catheter became occluded. It was re-
and chemotherapy in the indwelling catheter group.
placed in 1 patient who subsequently developed a
Only 1 patient in the entire group received radiother-
spontaneous pleurodesis. One patient had a docu-
apy to the mediastinum or chest wall. Indwelling Catheter for Malignant Effusions/Putnam et al. DISCUSSION Relation between Chemotherapy at the Time of Initial Treatment and
The current study demonstrates that patients with
Results of Treatment
symptomatic, recurrent MPEs can be managed effec-
Doxycycline Indwelling
tively with a chronic indwelling pleural catheter. The
pleurodesis catheter
primary advantage of this method is decreased hospi-
chemotherapy chemotherapy
talization time compared with that necessary forchemical pleurodesis via tube thoracostomy. There
were more complications during follow-up in the
pleural catheter group, but these complications
Because the life expectancy of patients with MPEs
is short, efforts should be made to minimize the du-ration of their hospitalization. The median survival of90 days in the current study is similar to that reported
Morbidity
in previous studies.12,13 Therefore, a reduction in the
The degree of pain experienced in the two groups was
median hospitalization time from 6.5 days to 1.0 day,
similar. The maximum and average degree of pain
which occurred in the current study with the indwell-
experienced in the first 24 hours after the procedure
ing catheter group, increases the time that the patients
were 55.5 Ϯ 37.6 and 28.1 Ϯ 28.6, respectively, in the
doxycycline pleurodesis group and 44.3 Ϯ 29.2 and
One possible criticism of the current study is the
23.7 Ϯ 20.2, respectively, in the pleural catheter group.
manner in which the efficacy of the two procedures
Almost all patients received opiates for analgesia dur-
was compared. Our primary measure of efficacy was
ing the first day, and there was no significant differ-
the percentage of patients who had a late recurrence
ence in the amount of analgesic received.
of the effusion and an initially successful procedure.
Early (in-hospital) morbidity occurred in 6 of 43
The incidence rate of late recurrence was 6 of 28
patients who received a chest tube: fever (n ϭ 2 pa-
patients (21%) in the doxycycline group and 12 of 91
tients), severe pain requiring PCA (n ϭ 2 patients),
patients (13%) in the indwelling catheter group. There
hydropneumothorax (n ϭ 1 patient), and occluded
are two different measures that can be used. The first
chest tube requiring tube replacement (n ϭ 1). Early
is the initial success rate, which compares the percent-
(in-hospital) morbidity occurred in 10 of 96 patients
age of initially successful pleurodesis in the doxycy-
with the indwelling catheter: fever (n ϭ 3 patients),
cline group with the percentage of initially complete
pneumothorax (n ϭ 3 patients), misplacement of
drainages in the indwelling catheter group. By using
catheter (n ϭ 2 patients), re-expansion pulmonary
this comparison, the indwelling catheter appears su-
edema (n ϭ 1 patient), and hypercapnic respiratory
perior, because, with this measure, the treatment was
failure secondary to over-sedation (n ϭ 1 patient). No
successful in 91 of 94 patients (97%) in the indwelling
catheter group but in only 28 of 41 patients (68%) in
In the 90-day follow-up period, there were several
the doxycycline pleurodesis group. We chose not to
complications in the pleural catheter group. Three
use this analysis, because the design of the study ob-
patients developed tumor seeding of the catheter tract
viously was biased in favor of the indwelling catheter
that did not require therapy. Six patients developed
group. Patients in the doxycycline group who had a
local cellulitis around the catheter tract that re-
trapped lung or large amounts of fluid after the chest
sponded to oral antibiotics and did not necessitate
tube was placed would be considered to have experi-
catheter removal. Pain during fluid drainage was re-
enced failure in the doxycycline group but not in the
ported by an additional 7 patients. The only compli-
cation reported in the doxycycline pleurodesis group
The second measure by which the two procedures
was pain at the chest tube site in 1 individual.
can be compared is long term control of the effusionwithout the presence of the catheter. By using this
Survival
comparison, doxycycline pleurodesis appears supe-
The median survival was poor but similar for both
rior, because it was effective in 22 of 41 patients (54%),
groups. For the chest tube patients (n ϭ 35 patients),
whereas the indwelling catheter was effective in only
the median survival was 90 days, whereas, for the
30 of 91 patients (33%). This analysis is biased against
pleural catheter group (n ϭ 87 patients), the median
the indwelling catheter group, because a pleurodesis
would have to occur for the treatment to be classified
CANCER November 15, 1999 / Volume 86 / Number 10
as successful. We maintain that a treatment is success-
the indwelling catheter also had to drain their pleural
ful as long as there is no pleural fluid, whether or not
fluid at home until they developed a spontaneous
pleurodesis. After the patients and/or their care givers
There are several methodological weaknesses to
were provided detailed oral and written instruction for
the current study. First, the study was not blinded for
draining the pleural fluid, most patients had no diffi-
obvious reasons. Accordingly, the investigators could
culty in following the protocol. Although the study
have been biased in assessing patient symptoms, ra-
coordinators were available at all times for questions,
diographs, or capability of being discharged. Second,
they rarely were contacted except when the catheter
the study was designed so that pleural catheter pa-
tients could be discharged within 16 –24 hours,
It is noteworthy that spontaneous pleurodesis oc-
whereas the doxycycline pleurodesis patients had to
curred in nearly 50% of the patients treated with the
remain in the hospital for a minimum of 3 days. If the
indwelling pleural catheter by unknown mechanisms.
sclerosing agent had been injected as soon as the lung
When patients are treated with tube thoracostomy for
re-expanded, and if the chest tube had been removed
several days, pleurodesis will develop in a significant
24 hours after the injection of the sclerosing agent, as
proportion of patients.20,21 In contrast, it is very uncom-
proposed previously,14 then there may have been less
mon for patients who are treated with serial therapeutic
of a difference in days of hospitalization. However,
thoracenteses to develop a spontaneous pleurodesis.22
other studies have shown that the median duration of
We believe that two conditions are necessary to induce a
hospitalization for pleurodesis with tube thoracos-
spontaneous pleurodesis, namely, the pleural space
must be completely drained, and there must be inflam-
The results of the current study for doxycycline
mation in the pleural space. Placement of a chest tube
pleurodesis tend to be slightly worse than those re-
ported previously with tetracycline pleurodesis. In a
When a patient is seen with a symptomatic recur-
review of pleurodesis for MPEs, treatment was suc-
rent pleural effusion, available treatment options in-
cessful in Ϸ70% of patients who were treated with
clude serial thoracentesis, thoracoscopy with chemi-
intrapleural tetracycline derivatives,18 whereas, in the
cal pleurodesis, tube thoracostomy with chemical
current study, the treatment was successful in only
pleurodesis, insertion of a pleuroperitoneal shunt, or
54% of patients. However, in another study, treatment
insertion of an indwelling pleural catheter. Factors
was successful in only 33% of patients at 30 days.13 At
that should be considered when making this choice
the present time, talc slurry is one of the most popular
include cost, hospitalization time, symptom relief,
sclerosing agents, and it may be more effective than
convenience, patient acceptance, complications, and
the tetracycline derivatives.18 However, acute respira-
tory failure has resulted from its administration,19 andthe duration of hospitalization required is comparable
We believe that the indwelling pleural catheter is a
to that for patients who are receiving tetracycline de-
good option for most patients with MPE primarily
rivatives.15–19 Doxycycline rather than talc slurry was
because of the reduced hospitalization time and the
chosen for the current study because of the concern
potential for outpatient use. In this study, a hospital-
about the acute respiratory distress syndrome with
ization of less than 1 day was required for the majority
talc slurry and the limited availability of sterile talc at
of patients treated with the indwelling catheter. In
contrast, median hospitalizations exceeding 5 days are
The indwelling pleural catheter required less hos-
reported commonly for patients who received pleu-
pitalization time; however, what were the drawbacks
rodesis with either tube thoracostomy15–17 or thora-
to its use? Table 2 shows that 12 of the 91 patients
coscopy.15 The initial success rate with the indwelling
(13%) with the indwelling catheter experienced a com-
catheter exceeds 90%, and only Ϸ10% of the catheters
plication after discharge from the hospital compared
fail when they have been successful initially. Patient
with no complications in the doxycycline pleurodesis
acceptance is good, symptoms are relieved, and com-
patients. However, the patients with cellulitis were
plications, for the most part, are minor. The major
treated successfully with oral antibiotics, and the pa-
disadvantage of the indwelling catheter is the neces-
tients with tumor seeding of the catheter tract did not
sity for the repeated drainage of the pleural space at
require treatment. Only the patient with the pleural
home should spontaneous pleurodesis not occur.
infection required hospitalization. These additional
Additional research is indicated to determine
complications in the indwelling catheter patients
whether the injection of sclerosing agents through the
seem minor compared with the extended hospital stay
indwelling catheter can be performed safely on an
associated with doxycycline pleurodesis. Patients with
outpatient basis. Indwelling catheters have been used
Indwelling Catheter for Malignant Effusions/Putnam et al.
for repeated intrapleural injections of antineoplastic
bers LW. A measure of quality of life for clinical trials in
chronic lung disease. Thorax 1987;42:773– 8.
Based on this study we conclude that the indwell-
11. Thal AP, Quick KL. A guided chest tube for safe thoracos-
tomy. Surg Gynecol Obstet 1988;167:517.
ing pleural catheter is an alternative treatment to tube
12. Chernow B, Sahn SA. Carcinomatous involvement of the
thoracostomy and chemical pleurodesis for the man-
pleura. An analysis of 96 patients. Am J Med 1977;63:695–
agement of patients with symptomatic recurrent
MPEs. The advantages of the indwelling pleural cath-
13. Ruckdeschel JC, Moores D, Lee JY, Einhorn LH, Mandel-
eter are that it can be inserted on an outpatient basis,
baum I, Koeller J, et al. Intrapleural therapy for MPEs. Arandomized comparison of bleomycin and tetracycline.
the initial success rate is high, and the associated
complications, for the most part, are minor.
14. Villanueva AG, Gray AW Jr., Shahian DM, Williamson WA,
Beamis JF Jr. Efficacy of short term versus long term tube
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Cognitive neuroscience Thomas D Albright*, Eric R Kandel† and Michael I Posner‡ The last decade of the 20th century has seen the developmentdisparate subfields of biology into one coherent disci-of cognitive neuroscience as an effort to understand how thepline. Almost all of the other unifications have beenbrain represents mental events. We review the areas ofspearheaded by the synthet
Elderberry Introduction: Elderberry, or elder, has been used for centuries to treat wounds, when applied to the skin. It is also taken by mouth to treat respiratory illnesses such as cold and flu. In many countries, including Germany, elder flower is used to treat colds and flu. Some evidence suggests that chemicals in elder flower and berries may help reduce swelling in mucous membranes, such