Source: http://www.google.com/patents/US6488697?dq=7800613
Timestamp: 2014-03-16 05:42:45
Document Index: 778478440

Matched Legal Cases: ['art 8', 'art 8', 'art 8', 'art 8', 'art 8', 'art 8', 'art 8', 'art 8', 'art 8', 'art 8']

Patent US6488697 - Apparatus for thermotherapy - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsThe controller 6 in the apparatus 10 for thermotherapy automatically computes the power P of the laser beam and the flow volume Q of the refrigerant forwarded to the main body 110 as the therapeutic conditions required for effecting the thermotherapy. The controller 6 delivers control signals to the...http://www.google.com/patents/US6488697?utm_source=gb-gplus-sharePatent US6488697 - Apparatus for thermotherapyAdvanced Patent SearchPublication numberUS6488697 B1Publication typeGrantApplication numberUS 09/614,587Publication dateDec 3, 2002Filing dateJul 12, 2000Priority dateJul 13, 1999Fee statusPaidAlso published asEP1068879A2, EP1068879A3Publication number09614587, 614587, US 6488697 B1, US 6488697B1, US-B1-6488697, US6488697 B1, US6488697B1InventorsShigeki Ariura, Haruo Ishiyama, Michihiro SugaharaOriginal AssigneeTerumo Kabushiki KaishaExport CitationBiBTeX, EndNote, RefManPatent Citations (15), Referenced by (7), Classifications (15), Legal Events (3) External Links: USPTO, USPTO Assignment, EspacenetApparatus for thermotherapyUS 6488697 B1Abstract The controller 6 in the apparatus 10 for thermotherapy automatically computes the power P of the laser beam and the flow volume Q of the refrigerant forwarded to the main body 110 as the therapeutic conditions required for effecting the thermotherapy. The controller 6 delivers control signals to the laser beam generating device 2 and the refrigerant circulating device 4, depending on the therapeutic conditions obtained as described above. The therapeutic conditions thus set are displayed on the monitor 7 together with the input information introduced into the operating part 8. The controller 6 is further capable of automatically computing the therapeutic conditions required for effecting the thermotherapy based on the minimum distance d1 and the maximum distance d2 between the laser beam emitting terminal 111 a, namely the surface of the surface layer 21, and the target site 30. Images(23) Claims(18)
SUMMARY OF THE INVENTION One object of the invention is to provide an apparatus for thermotherapy which, depending on the morbid state of a patient, allows therapeutic conditions for effectively heating exclusively a given site of lesion to be set accurately and easily, and meanwhile prevents the normal tissue in the proximity of the site of lesion from sustaining damage.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a system structure diagram of an apparatus for thermotherapy,
FIG. 6 is a cross section taken through FIG. 3 along the line VI�VI,
FIG. 6 is a cross section taken through FIG. 3 along the line VI�VI.
For example, the gaseous laser such as the He�Ne laser, the solid laser such as the ND-YAG laser, and the semiconductor laser such as the GaAlAs laser can be effectively applied to the laser beam generating device 2 which generates a laser beam having a wavelength in the range mentioned above.
The operator secures input information including the data for specifying the size of the prostate gland from the tissue of prostate gland diagnostically determined and imparts the input information to the apparatus via the operating part 8 (S11). The expression �the data for specifying the size of the prostate gland� as used herein refers to the diagnostic data useful for discerning the size of the prostate gland. It embraces the diameter of the prostate gland, and the volume and the weight of the prostate gland, for example. The other items of the input information include the tissue density of the prostate gland and the flow volume of blood within the prostate gland, for example. The controller 6 may be so constructed as to read the input information including the data for specifying the size of the prostate gland from the diagnostic data of a given patient stored in a memory not shown. The input means does not need to be limited to the operating part 8. The controller 6, when necessary, may be provided with a connecting part which, when connected to such an external device as a prostate gland diagnosing device not shown or a computer memorizing patient information not shown, is enabled to obtain as an input from the external device the information including the diagnostic data of the prostate gland. When this connecting part is used during the course of diagnosis or at the operator's own discretion, the information containing the diagnostic data of the prostate gland is transferred to the controller 6, with the result that the therapeutic conditions will be automatically set, the trouble of imparting the information with the aid of the operating part 8 will be avoided, and the possibility of entailing erroneous impartation through the operating part 8 will be precluded.
Where 46≦L min≦52; P=A 1�L min 2 −B 1�L min +C 1 (1-1) Q=A 2�L min 2 −B 2�L min +C 2 (1-2) wherein
FIG. 14 is a diagram illustrating the results of the experiment of measuring the temperature distribution of the heated object and FIG. 15 is a diagram illustrating as a type specimen the range in which the temperature rise was found to be not less than +8� C. based on the results of experiment of FIG. 14. In FIG. 14, �Lmin=46 mm� represents the result of measurement of temperature distribution in Experiment 1, �Lmin=50 mm� represents the result of measurement of temperature distribution in Experiment 2, and �Lmin=52 mm� represents the result of measurement of temperature distribution in Experiment 3. FIG. 15A corresponds to Experiment 1, FIG. 15B to Experiment 2, and FIG. 15C to Experiment 3.
Next, the physician determines the target site of heating from the site of lesion comprehended by the diagnostic examination and imparts the input information including the position information as an input to the operating part 8 (S41). The expression �position information of the site of target� as used herein refers to the information of the position of the target site in the form of a plane or a space relative to the laser beam emitting device. The controller 6 may be so constructed as to read the input information containing the position information of the target site from the diagnostic data of a patient stored in a memory not shown. The input means does not need to be limited to the operating part 8. For example, the controller 6 may be provided with a device for diagnostically determining the site of lesion not shown or with a connector which, by being connected to an external device such as a computer storing the patient information, is enabled to introduce the position information of the site of target which is the target site of heating from the external device. By using the connecting part mentioned above and consequently enabling the controller 6 to introduce the position information of the target site (which is the target site of heating) during the course of diagnosis or at a time selected arbitrarily by the physician, it is possible to effect automatic setting of the therapeutic conditions, save time and labor in the manipulation of the operating part 8 for the impartation of the input information, and prevent the operating part 8 from admitting erroneous input information.
Where d 1=4 and 15≦d 2≦18; P=A 1�(d 2−4)2 −B 1�(d 2−4)+C 1 (2-1) Q=A 2�(d 2−4)2 −B 2�(d 2−4)+C 2 (2-2) wherein
Where 4<d 1≦6 and d 2−d 1=11; P=D 1+E 1�(d 1−4) (2-3) Q=D 2+E 2�(d 1−4) (2-4) wherein
Where +8≦ΔT≦+12 and 9≦D≦11; P=F�ΔT+G+(H�ΔT−I)�(D−9) (3-1) Q=J+K�(D−9) (3-2) wherein F=0.825, G=0.5, H=0.05, I=0.2, J=50, and K=75
Where +8≦T−T 0≦+12 and 9≦D<11; P=F�(T−T 0)+G+(H�(T−T 0)−I)�(D−9) (3-3) FIG. 26-FIG. 28 pertain to seven experiments, i.e. Experiment 1b: ΔT=+8 and D=9, Experiment 2b: ΔT=+10 and D=9, Experiment 3b: ΔT=+12 and D=9, Experiment 4b: ΔT=+8 and D=10, Experiment 5b:ΔT=+8 and D=11, Experiment 6b: ΔT=+12 and D=10, and Experiment 7b: ΔT =+12 and D=11. By imparting as an input the distance D (mm) from the emitting terminal 111 a to the target point and the target temperature (�C.) or the value of rise of the target temperature ΔT (�C.) at the target point obtained in Experiments 1b-7b into the operating part 8 of the apparatus 10 for thermotherapy, it is enabled to set the power P (W) of the laser beam and the flow volume Q (ml/min) of the refrigerant forwarded to the main body 110 as follows in accordance with the expressions (3-1)-(3-3) mentioned above.
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