U.S. patent number 3,601,031 [Application Number 04/859,994] was granted by the patent office on 1971-08-24 for patient isolator room.
This patent grant is currently assigned to Litton Systems. Invention is credited to Kenneth Abel, Arnold W. BLOMQUIST, Richard K. OLSON, Keith A. UFFORD.
United States Patent |
3,601,031 |
Abel , et al. |
August 24, 1971 |
PATIENT ISOLATOR ROOM
Abstract
The invention relates to a patient isolator room which is
designed and adapted to be assembled within the confines of an
ordinary hospital room. The isolator room is equipped with an
airflow and filtering system which functions to isolate a patient
from micro-organisms present in a hospital environment and, vice
versa, to isolate a patient having an infectious disease.
Inventors: |
Abel; Kenneth (N/A),
BLOMQUIST; Arnold W. (N/A), OLSON; Richard K. (N/A),
UFFORD; Keith A. (N/A, MN) |
Assignee: |
Systems; Litton (CA)
|
Family
ID: |
25332253 |
Appl.
No.: |
04/859,994 |
Filed: |
September 22, 1969 |
Current U.S.
Class: |
454/187; D25/1;
D25/35; 55/385.2; 62/261; 600/21; 607/81; 96/223; 55/DIG.29;
D25/33; D25/58; 55/467; 454/251 |
Current CPC
Class: |
A61G
10/005 (20130101); F24F 3/167 (20210101); Y10S
55/29 (20130101) |
Current International
Class: |
A61G
10/00 (20060101); F24F 3/16 (20060101); F24F
013/00 () |
Field of
Search: |
;98/33,33A,33R
;128/371,373 ;62/261 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Wye; William J.
Claims
We claim:
1. A portable patient isolator room adapted to be assembled within
the confines of a hospital room comprising, vertical wall means,
roof means attached to said wall means, said wall means including
one wall having an air inlet section and an air outlet section,
said inlet and outlet sections being horizontally adjacent each
other, air-conveying means for drawing air into said inlet section
and expelling air out of said outlet section, a wall divider
extending partially into said isolator room from said wall from a
point between said inlet and outlet sections, means for filtering
and horizontally directing a uniform flow of air expelled from said
outlet section, said wall divider dividing said room into a bed
area and a corridor through which air flows to said air inlet
section, said corridor being of lesser width than said bed area and
having a closeable entrance way, said air outlet section being
formed to emit a horizontal laminar flow of air through said bed
area, said flow of air having substantially the same height and
width as said bed area.
Description
This invention relates to a patient isolator room which is designed
and adapted to be assembled within the confines of a normal or
ordinary hospital room. The isolator room provides a relatively
germ-free environment for long term confinement of patients who
require such an environment in certain instances such as for
patients requiring through an environment in certain instances such
as for patients cancer chemotherapy treatments, recovering from
transplant operations, having severe burns, are asthmatics or are
in shock.
The patient isolator room is equipped with an air flow and
filtering system which functions to isolate a patient from
micro-organisms present in a hospital environment and, vice versa,
to isolate a patient having an infectious disease.
A main object of the invention is to provide a new and improved
patient isolator room having an air flow and filtering system which
creates a germ-free environment and effectively isolates the
patient from the hospital environment outside the isolator room. A
further object is to provide such a room which may be readily
assembled within the confines of an ordinary hospital room.
Other objects of the invention will become apparent from the
following specification, drawings and appended claims. In the
drawing:
FIG. 1 is a perspective view showing a portable patient isolator
room constructed in accordance with the invention; and
FIG. 2 is a plan view of the patient isolator room shown in FIG.
1.
The environment for a portable patient isolator room constructed in
accordance with the invention would normally be a conventional type
of hospital room with the isolator room being assembled inside the
hospital room. The isolator room can normally be assembled and
installed in approximately one day. Renovation of the hospital room
is held to a minimum since the isolator room itself contains all
needed patient support equipment except power and water which is
furnished by the hospital.
Referring to FIGS. 1 and 2, a conventional hospital room is
represented by four walls 11 to 14 with walls 11 and 13 being
common walls of adjacent rooms, wall 12 being an outside wall with
windows and wall 14 being an inside wall with a door 15 leading to
a hallway.
The patient isolator room is assembled within the confines of a
hospital room and may have various forms within the scope of the
invention. The isolator room illustrated has four walls, or forms
of walls. One of the walls may have the form of or be a filtering
module 20 which normally would have a height of about 7 feet and
have a generally rectangular shape. Throughout this description the
filtering module will be referred to interchangeably and
indiscriminately as a filtering module or as a wall.
A frame structure 22 may be provided for supporting or forming the
other walls and the ceiling but other types of erected structures
may also be used. As illustrated, an end wall 24, the wall 26
opposite the filtering module 20, and the ceiling 28 have clear
glass panels or panels made of a clear plastic material. These
panels could also be opaque if desired but it is more convenient to
disclose them as being transparent for purposes of
illustration.
The "wall" 30 opposite wall 22 is illustrated as having the form of
a curtain which may be drawn aside to permit entry into the
isolator room.
A room divider 32 extends from the filtering module 20, from a
point between the ends thereof, part way into the isolator room and
terminates short of the wall 26. The divider extends from the floor
to the ceiling so that there can be no air flow over the top of the
divider. The exact placement of the room divider 32 is optional to
some extent but in one satisfactory arrangement the spacing of the
divider from the left end of wall 20 is about one-fourth the length
of that wall. The length of the divider 32 may be about
three-fourths the width of the isolator room from wall 20 to the
wall 26. The room divider 32 must of course be between or at the
junction of the air inlet and outlets 38 and 40 in any arrangement
selected.
The primary function of the room divider 32 involves and relates to
the flow of air in the isolator room but, as illustrated, its
presence permits it to also be used secondarily as a conventional
room divider to house a sink, have the attributes of a desk,
contain cabinets and have shelving at the top thereof.
The divider 32 divides the isolator room into a patient's area 34
which contains a bed and other hospital room facilities and an air
return corridor 36. The filtering module or wall 20 has an air
inlet section 38 on one side of the divider 32, at the end of the
corridor 36, and an air outlet section 40 on the other side of the
divider. The air inlet and outlet sections extend from the floor to
the ceiling and occupy the entire wall surface of the wall 20
except for area where the divider 32 joins the wall 20.
The air inlet and outlet sections are provided respectively with
grilles 42 and 44 which are designed to accommodate and facilitate
the horizontal uniform flow of air into and out of these sections.
Behind grille 42 is a motorized blower 46 for drawing air through
grille 42 and blowing it out through grille 44. Between grille 42
and the blower is a low-efficiency filter 48 which is referred to
as a prefilter.
Behind grille 44 is a special type of filter 50 known as a HEPA
filter which means "high efficiency particulate arrestor." This
type of filter is typically made of microglass fibers and organic
binders. It is manufactured as a sealed unit to prevent leaks and
the channeling of nonfiltered air. This type of filter must be
replaced periodically but under conditions of hospital cleanliness
may have an operational life of five years or more.
The purpose of the patient isolator room, as mentioned in the
introduction, is to provide a germ-free environment for the
patient. In operation the blower is preferably selected or adjusted
so that the air emanating through the HEPA filter 50 and grille 44
into the patient's area 34 has a speed of from 30 to 100 feet per
minute. Although air movement at these velocities is almost
imperceptible to the patient, a cubic foot of space in the area 34
gets a change of air about 100 times per minute at the higher air
flow rates. The HEPA filter functions to horizontally direct a
uniform flow of air into area 34 and, as there is thus an absence
of eddy currents, micro-organisms on articles in the room are
constantly being swept directly and uniformly away from the
patient. Air so swept away from the patient is drawn by the blower
46 around the end of divider 32 through the corridor 36 and into
the air intake section 38. If the corridor 36 is one-third the
width of the patient's area 34, as an approximation, the air
velocity through the corridor will be several times faster, such as
300 feet per minute, for example. This added speed for the air flow
in the corridor 36 has the advantage that nurses and doctors
entering the room through the curtain 30 will be "washed" by higher
speed air so that micro-organisms clinging to their clothing will
be swept away by a higher velocity air than to which the patient is
exposed. This means that medical personnel may enter and leave the
isolator room with minimal special preparation.
It is not practical, feasible or desirable to seal the isolator
room so as to be airtight. The flow of air past the patient and
through the corridor 36 picks up air seeping into the room,
however, and immediately draws it through the filtering system and
cleans it.
* * * * *