Source: http://www.docstoc.com/docs/78244302/Heart-Wall-Tension-Reduction-Apparatus-And-Method---Patent-7695425
Timestamp: 2014-12-19 07:27:51
Document Index: 40083585

Matched Legal Cases: ['art.\n3', 'art.\n4', 'art.\n5', 'art.\n7', 'art 14', 'art 40', 'art 14', 'art 14']

Heart Wall Tension Reduction Apparatus And Method - Patent 7695425
United States Patent: 7695425
7,695,425
Schweich; Cyril (Maple Grove, MN), Mortier; Todd (Minneapolis, MN)
10/778,176
10326585Dec., 20026755777
09985362Nov., 20016514194
09697596Oct., 20006332863
09543155Apr., 20006165120
09224349Jan., 19996165119
08933456Sep., 19975961440
600/16  ; 600/17; 600/18; 600/37; 601/11; 601/153
600/16-18,37 601/11,153 623/3,11 128/897-898
Northup, III et al.
2003/0229260
2003/0229261
2003/0229266
2004/0015039
2004/0015040
2004/0015041
2004/0034271
2004/0059180
2004/0143323
WO 98/44969
WO 00/27304
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10/326,585, filed Dec. 20, 2002, now U.S. Pat. No. 6,755,777, which is a
continuation of U.S. application Ser. No. 09/985,362, filed Nov. 2, 2001,
now U.S. Pat. No. 6,514,194, which is a continuation of U.S. application
Ser. No. 09/697,596, filed Oct. 27, 2000, now U.S. Pat. No. 6,332,863,
which is a continuation of U.S. application Ser. No. 09/543,155, filed
Apr. 4, 2000, now U.S. Pat. No. 6,165,120, which is a continuation of
U.S. application Ser. No. 09/224,349, filed Jan. 4, 1999, now U.S. Pat.
No. 6,165,119, which is a divisional of U.S. application Ser. No.
08/933,456, filed Sep. 18, 1997, now U.S. Pat. No. 5,961,440, which is a
continuation-in-part of U.S. application Ser. No. 08/778,277, filed Jan.
2, 1997, now U.S. Pat. No. 6,050,936, the entire disclosures of each of
1.  A surgical procedure comprising: advancing an elongate member towards a target location on a patient&#39;s heart, wherein the elongate member includes a proximal end, a distal
end, and a lumen extending therebetween;  inserting the distal end of the elongate member through a heart wall and into a heart chamber;  introducing an instrument and an element through the elongate member for installing the element;  and installing the
element in contact with first and second spaced apart portions of the heart, wherein the element traverses a chamber of the heart, and wherein all portions of the heart chamber remain in non-contacting fluid communication when the element is installed.
2.  The surgical procedure according to claim 1, wherein the chamber is a left ventricle of the heart.
3.  The surgical procedure according to claim 1, wherein the element is secured to the first and second spaced apart portions of the heart.
4.  The surgical procedure according to claim 1, wherein the element includes a generally elongate member attached to each of the first and second spaced apart portions of the heart.
5.  The surgical procedure according to claim 1, wherein one of the first and second spaced apart portions of the heart includes an external heart wall.
6.  The surgical procedure according to claim 1, further comprising exerting tension on the element to reduce a dimension of the heart.
7.  The surgical procedure according to claim 1, further comprising exerting tension on the element to draw the first and second spaced apart portions of the heart toward one another.
8.  The surgical procedure according to claim 1, wherein the element includes a first end and a second end, and one of the first and second ends is anchored to an external heart wall by an anchor.
9.  A surgical procedure comprising: advancing an elongate member towards a target location on a patient&#39;s heart, wherein the elongate member includes a proximal end, a distal end, and a lumen extending therebetween;  inserting the distal end of
the elongate member through a heart wall and into a heart chamber;  introducing an instrument and an element through the elongate member for installing the element;  and installing the element in contact with first and second spaced apart portions of the
heart, wherein the element includes a generally elongate member attached to each of the first and second spaced apart portions of the heart, and wherein all portions of the heart chamber remain in non-contacting fluid communication when the element is
10.  A surgical procedure comprising: advancing an elongate member towards a target location on a patient&#39;s heart, wherein the elongate member includes a proximal end, a distal end, and a lumen extending therebetween;  inserting the distal end
of the elongate member through a heart wall and into a heart chamber;  introducing an instrument and an element through the elongate member for installing the element;  installing the element in contact with first and second spaced apart portions of the
heart;  and exerting tension on the element to improve heart function, wherein all portions of the heart chamber remain in non-contacting fluid communication when the element is installed.  Description
(LVEDP), or left ventricular end diastolic volume (LVLEDV).  Physiologically, the preferred definition is the length of stretch of the sarcomere at end diastole.  Diuretics reduce extra cellular fluid which builds in congestive heart failure patients
cantilever members can be disposed at opposite ends of the frame member.  Each cantilever member includes at least one atraumatic pad disposed thereon.  The atraumatic pads disposed at opposite ends of the frame member can be biased toward each other to
One method of placing a heart wall tension apparatus or splint on human heart includes the step of extending a hollow needle through at least one chamber of the heart such that each end of the needle is external to the chamber.  A flexible leader
is connected to a first end of a tension member.  A second end of the tension member is connected to an atraumatic pad.  The leader is advanced through the needle from one end of the needle to the other.  The leader is further advanced until the second
end of the tension member is proximate the heart and the first end of the tension member is external to the heart.  A second atraumatic pad is connected to the first end of the tension member such that the first and second atraumatic pads engage the
anchors or pads 621.  Splint 616 includes two tension members 618.  Each tension member 618 extends between anchors 520 and respective anchors 621.
FIG. 24 is a vertical cross-sectional view of a chamber 10 of a heart 14.  A needle 60 having a stylet inserted therethrough is inserted through chamber 10.  FIG. 25 shows needle 60 disposed in heart 40 as shown in FIG. 24.  In FIG. 25, stylet 6
has been removed.  A tension member 64 having a flexible leader 66 attached to one end of tension member 64, is threaded through needle 60 and an anchor 68.
through ends 272 aligned along axis B.
FIG. 30 is a vertical, cross-sectional view of left ventricle 10 of heart 14.  Anchors 68 have been placed on opposite sides of heart 14.  A needle 160 extends through the lumen of tension member 164, left ventricle 10 and openings 78 in anchors
the circular transverse cross-section of the chamber in FIG. 36 is equal to the perimeter of the figure eight transverse cross-section of FIG. 37.  For purposes of this model, opposite lobes of the figure in cross-section are assumed to be mirror images.
cylinder of FIG. 36).  These various parameters are related as follows: h=R.sub.2 COS(.theta./2) l=2R.sub.2 SIN(.eta./2) R.sub.2=R.sub.1.pi./(2.pi.-.theta.)
Where chamber 48 is unsplinted as shown in FIG. 36 A.sub.1, the original cross-sectional area of the cylinder is equal to A.sub.2 where .theta.=180.degree., h=0 and t=2R.sub.2.  Volume equals A.sub.2 times length L and circumferential wall
FIGS. 39 and 40 show a hypothetical distribution of wall tension T and pressure P for the figure eight cross-section.  As .theta.  goes from 180.degree.  to 0.degree., tension T.sub.s in the splint goes from 0 to a 2T load where the chamber walls
It will be understood that this disclosure is in many respects, is only illustrative.  Changes may be made in details, particularly in matters of shape, size, material, and arrangement of parts without exceeding the scope of the invention.
Heart wall tension reduction apparatus and method, Schweich, et al., Cyril Schweich, Todd Mortier, Application number 10 778-176, Surgery, Surgery: Kinesitherapy, heart wall, tension reduction, Patent Search, Heart Valve, left ventricle, Patent Agent, heart chamber, heart failure, Patent application, patent applications