USOO7962190B1 United States Patent (12) (10) Patent N0.: US 7,962,190 B1 Diab et a]. (45) Date of Patent: Jun. 14, 2011 (54) SIGNAL PROCESSING APPARATUS FOREIGN PATENT DOCUMENTS DE 3 234 388 9/1982 (75) Inventors: Mohamed K. Diab, Laguna Niguel, CA (Continued) (US); Esmaiel Kiani-Azarbayj any, Laguna Niguel CA (Us) OTHER PUBLICATIONS Rabiner, Lawrence et 31. Theory and Application of Digital Signal (73) Assignee: MASIMO Corporation, Irvine, CA Processing, p, 260, 1975, US ( ) (Continued) ( * ) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 Primary Examiner * Eric F Winakur U.S.C. 154(b) by 681 days. (74) Attorney, Agent, or Firm * Knobbe Martens Olson & (21) Appl. No.: 09/111,604 Bear LLP (22) Flled: Jul. 7, 1998 (57) ABSTRACT Related US“ Application Data A signal processor which acquires a ?rst signal, including a (63) Continuation of application No. 08/943,511, ?led on ?rm anary Slgnal P011101} and 2} ?rSt secondary Slgna1_por' Oct 6’ 1997’ HOW Pat NO 6,263,222, which is a non, and a second s1gnal, includlng a second pr1mary signal continuation of application No. 08/572 488 ?led on pomon and a seCOIFd seCOPdar-‘Y Slgml Pomon’ Wherem the Dec 14 1995 HOW Pat NO 5 685 29’9 W’hich is a ?rst and second pr1mary s1gnal portions are correlated. The continuation of application No 308/132 812 ?led on Slgne-lls may be acqmred by propagatmg energy through- a O t 6 1993 P t N 5 4 9'0 505 ’ ’ medium and measuring an attenuated s1gnal after transmis C ' ’ ’ now a ' 0' ’ ’ ' sion or re?ection. Alternatively, the signals may be acquired 51 I t C1 by measuring energy generated by the medium. A processor ( ) 1411623 /1455 2006 01 of the present invention generates a primary or secondary ( ' ) reference signal which is a combination, respectively, of only (52) US. Cl. ...................................... .. 600/336; 600/322 the primary or secondary Signal portions_ The secondary ref_ (58) Field of Classi?cation Search ................ .. 600/310, erenee signal is then used to remove the secondary portion of 600/322, 323, 330, 336, 473, 476; 356/41 each ofthe ?rst and second measured signals via a correlation See application ?le for complete search history. canceler, such as an adaptive noise canceler, preferably of the joint process estimator type. The primary reference signal is (56) References Cited used to remove the primary portion of each of the ?rst and second measured signals via a correlation canceler. The pro US. PATENT DOCUMENTS cessor of the present invention may be employed in conjunc tion with a correlation canceler in physiological monitors 3,638,640 A 2/1972 Shaw 3,647,299 A 3/1972 Lavallee wherein the known properties of energy attenuation through a 3,659,591 A 5/1972 D011 et a1. medium are used to determine physiological characteristics 3,704,706 A 12/1972 Hecmfeld et a1. of the medium. Many physiological conditions, such as the 3,991,277 A 11/1976 Hirata pulse, or blood pressure of a patient or the concentration of a 3,998,550 A 12/1976 Konishiet a1. constituent in a medium, can be determined from the primary 4,038,536 A 7/1977 Feintuch or secondary portions of the signal after other signal portion 4,063,551 A 12/1977 Sweeney is removed. 4,086,915 A 5/1978 Kofskyet a1. (Continued) 1 Claim, 20 Drawing Sheets Aisignia Sham K25 27 CORRELATION DISPLAY CANCELER $150) US 7,962,190 B1 Page 2 US. 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EP 0 261 789 3/1988 Nellcor’s Second Supplemental Response to Masimo’s First Set of Ep 0261 789 3/1988 Interrogatories in Consolidated Case (No. 2), dated Jul. 14, 2003. EP 0 271 340 6/1988 Addendum to Nellcor’s Second Supplemental Response to EP 0271 340 6/ 1988 Masimo’s First Set of Interrogatories in the Consolidated Case (No. EP 0 290 273 11/1988 2), dated Jul. 15, 2003. US 7,962,190 B1 Page 5 Second Addendum to Nellcor’s Second Supplemental Response to Amended Complaint for Patent Infringement of US. Patent Nos. Masimo’s First Set of Interrogatories in the Consolidated Case (No. 5,490,505 and 6,036,642; Demand for Jury Trial, dated Apr. 5, 2000, 2), dated Aug. 10, 2003. entered Apr. 18, 2000. Third Addendum to Nellcor’s Second Supplemental Response to Answer to First Amended Complaint and Amended Counterclaim; Masimo’s First Set of Interrogatories in the Consolidated Case (No. Demand for Jury Trial, dated May 1, 2000. 2), dated Aug. 13, 2003. Plaintiff Masimo Corp. ’s Reply to Defendants’ FirstAmended Coun Nellcor’s Oct. 13, 2003 Supplemental and Revised Response to terclaims; Demand for Jury Trial, dated May 18, 2000. Masimo’s First Set of Interrogatories in the Consolidated Case (No. Nellcor’ s and Mallinckrodt’ s Amended and Supplemental Answer to Counterclaims to Masimo Corporation’s First Amended Complaint 2), dated Oct. 13, 2003. in Case No. CV-01-7293-MRP (AJWX), dated May 31, 2002. US. District Court, Central District of California (Western Divi Masimo’s Reply to Nellcor’s and Mallinckrodt’s Amended and sioniLos Angeles) Civil Docket for Case #1 2100-cv-06506-MRP Supplemental Answer and Counterclaims to Masimo’s First AJW. Amended Complaint in Case No. -01-7293 MRP (AJWX ), datedAug. US. District Court, Central District of California (Western Divi 27, 2002. sioniLos Angeles) Civil Docket for Case #1 2101-cv-07292-MRP Memorandum of Decision re: Mallinckrodt and Nellcor’ s Motion for AJW. Summary Judgement of Invalidity of Claim 19 of US. Patent No. US. District Court, Central District of California (Western Divi 5,490,505. sioniLos Angeles) Civil Docket for Case #1 2101-cv-07293 -MRP Minute Order 1) Granting Defendants’ Motion for Summary Judg AJW. ment of Non-Infringement of ’642 Patent; 2) Denying Plaintiffs Complaint for Patent Infringement of US. Patent Nos. 6,206,830 Bl Motion for Preliminary Injunction; 3) Granting Plaintiffs EX Parte and 6,157,850; Demand for Jury Trial, dated Jul. 6, 2001. Application to Strike Defendants’ Supplemental Declaration, dated First Amended Complaint for Patent Infringement of US. Patent Oct. 4, 2000, entered Oct. 6, 2000. Nos. 6,206,830 B1, 6,157,850 and 6,263,222 B1; Demand for Jury Defendant’s Mallinckrodt’s and Nellcor’s Statement of Trial, dated Jul. 18, 2001. Uncontroverted Facts and Conclusions of Law. 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