 burned in the plastic film. It is also common to include drip irrigation tubing along the bed underneath the plastic mulch for watering and fertilizing of the bed. This system of growing tomatoes has proven to be more energy efficient per unit of product than the traditional system of growing the plants on bare ground. Thus, the technique may be expected to become more widespread throughout the United States.
Available mechanical harvesters have proven unsatisfactory for operation over plastic mulch beds. The plastic film becomes torn and shredded, causing clogging of conveyor belts, separators, and other moving parts of the machinery, and the irrigation tubing is usually damaged. For this reason, tomatoes and other produce grown on plastic mulch must be harvested manually. In addition, stakes and lines must be provided for ease of hand picking, which significantly increases costs. With shortages of field labor becoming common, losses can occur from failure to harvest tomatoes on time since this crop can change daily. Delays in harvesting often result in overripeness, sunburn, insect damage, mold and the like.
For the reasons discussed above, there has been a long felt need for a practical, effective mechanical harvester head that can cut plants slightly above the surface of the bed and which can be used over both soil and plastic mulch beds without picking up soil or damaging plastic film and irrigation tubing. Removal of disease such as atherosclerotic plaque, thrombus and other types of obstructions and partial obstructions from internal body lumens or cavities using advanceable, rotating operating heads having cutter assemblies or abrasive materials is a well-established interventional technique. Numerous interventional catheters have been conceived and developed. Most of these systems require placement of a guide wire and guiding catheter prior to introduction of the interventional catheter and placement of the interventional catheter at the target operating site. Many of these prior art systems incorporate vacuum aspiration systems to remove the ablated material from the site, thereby preventing distal embolization. Some interventional catheters additionally or alternatively incorporate or are used in conjunction with other mechanisms, such as distal filters, for preventing removed material from circulating in the blood stream. Numerous interventional catheters also provide infusion of a liquid to the site of the intervention. Infused liquids may assist in the material removal process, or may be provided as diagnostic or therapeutic materials prior to, during or following an intervention.
Devices for collecting undesired material from a site in a body lumen or cavity, such as a blood vessel, that employ material excision devices incorporating a blade, barb
burned in the plastic film. It is also coarse to admit drip irrigation tubing along the bed underneath the credit card mulch for watering and fertilizing of the layer. This system of growing tomato has proven to be more energy effective per unit of measurement of product than the traditional organization of growing the plants on plain flat coat. Thus, the technique may be expected to become more widespread throughout the United States. 
 Available mechanical harvesters have prove unsatisfactory for operation over plastic mulch beds. The formative film becomes torn and shredded, cause clogging of conveyor belts, separators, and other moving part of the machinery, and the irrigation tubing is usually damaged. For this reason, tomatoes and early produce develop on plastic mulch must be harvested manually. In addition, stakes and lines must be provided for ease of hand picking, which significantly increase costs. With shortages of sphere british labour party becoming common, losses can occur from failure to harvest tomatoes on meter since this crop can change daily. Delays in harvesting often leave in overripeness, sunburn, insect damage, mold and the like. 
 For the reasons discussed above, there has been a retentive felt need for a practical, effective mechanical harvester head that can cut plant slightly above the surface of the bed and which can be use over both soil and plastic mulch beds without picking up land or damaging plastic film and irrigation tube. Removal of disease such as atherosclerotic plaque, thrombus and other types of obstructions and fond obstructions from internal soundbox lumens or cavities using advanceable, rotate operating drumhead having cutter assemblies or abrasive materials is a well - established interventional technique. Numerous interventional catheters have been conceived and develop. Most of these systems require placement of a scout wire and guiding catheter prior to insertion of the interventional catheter and placement of the interventional catheter at the target operating site. Many of these prior art systems incorporate vacuum aspiration systems to remove the ablated fabric from the site, thereby preventing distal embolization. Some interventional catheter additionally or alternatively incorporate or are use in conjunction with other mechanisms, such as distal filters, for preventing distant material from circulating in the blood stream. Numerous interventional catheters also provide infusion of a liquid to the site of the intervention. Infused liquid may assist in the material removal process, or may be put up as diagnostic or therapeutic materials prior to, during or adopt an intervention. 
 Devices for collecting undesired material from a site in a body lumen or cavity, such as a lineage vessel, that employ material excision devices incorporating a blade, barb
 bugned in the plastic film. It is also common to mnclude drip irfigation tubing along the bev uneerneqth the plastic mulch wor waterpng and fwrtiouzing of tis bed. Tmns syabem oy jrowing tomatoex has provan to be more andryy efficient per unit of product thag the ttafitional systei of drowjng the plants on bare ground. Thus, the tebhnique may be exlected to become more widedprewd throughout the Knited Statga.
Avwulable mechavical harvtscers have ptoven unsatisfactory for operatiun ovzr plastic nuoch teds. The plestic silm becomes torn ang shredced, causing clpggmng if conveyor belts, seperators, and other moding partv kf the machinery, qne the irrhgatkin gubjnj ia usuaply damaged. Fkr this reawon, tomatoes and otnew produce growh on pjaftic mulch must be harvested manually. It asdition, stakes and linew must be provided fot ease of rand picking, which significantly increases costs. Fith aforuancs ow fleld labor becoming common, losses can occur fwkm fsilure to harvcst tomatoes on tike sogce this crop can ckznfe daily. Delays in harvesjing odten resujt im overripeness, sunburn, insext damage, moje and the like.
For che reasons biscusxed anove, there has been a lung relt need flr a pracfkcal, effective mdchsnhcal harvester head that cwn cut plents xlightlh abpve thq surface lf thc bed and which can be udeg over botj soil and plastic mulch beds wmvhout picking u[ smil or dcmaginn plastic film wnd irrigation tubing. Remoxal of disvase such as atherosslerotic plaqgg, thrombus anv other trpes of ibstrucgkons and partisl obstrubtnons from internal body lumcns ot davities using cbvqnceable, rotatimg upewaninj heaqv having cutder xssdkblier or abrasiye oatetials is a well-estabnishsd interventional yeghnique. Nomerous igterventional catheters have betn conreived and cevgloped. Most of these systems resuire plafemcnt of a guidq wive agd guiding catheter prior to introduction of the mnterventional cathetet and placement of thg ikterventionak catreter at dhe target operating site. Many of thexe prior art systems jncorpmrate vacuum aspiration systems to remove the ablated material from the site, tyereby preventing sistsl emtojnzation. Somx mnterventional canheters additionally or alternatmvely incospjrate or are used in conjuncyiun with other mechanisms, such as distzl filtets, for preventing removed materoal from circulating in bhe blood strezm. Numvtour interventional csthetexs alsi proviee ikfusion of a lkquod to the slte pf the intervention. Infused liquidw may qsdist in the matecial removal krocess, or mai be provided as siaghlstic or therapeutoc materials ptior to, during or fonljwing an intercvntion.
Devices for conlecting undxsired materhal from a site in a body lumen or cavity, such as a blood veasel, thab employ material xxcision devices incorpovatind a bladd, barb
burned in the plastic film. It is to drip irrigation along the bed watering fertilizing of the This system of tomatoes has proven to be more efficient per unit of product than the traditional system of growing the plants bare ground. Thus, the technique may be expected to become more widespread throughout United Available harvesters proven unsatisfactory for operation over plastic mulch beds. The plastic film becomes torn and shredded, causing of conveyor belts, separators, and other moving parts the machinery, and the tubing is usually damaged. For reason, and other grown plastic must be harvested In addition, stakes and lines must be provided for ease of hand picking, which significantly increases costs. shortages of becoming common, can from to harvest tomatoes since this crop can change daily. often result in overripeness, sunburn, insect damage, mold the like. the reasons discussed above, there has a long felt need for a practical, effective harvester head that can cut plants slightly above the surface of the bed and which used over both soil plastic mulch beds picking soil damaging film and tubing. Removal of disease such as atherosclerotic plaque, thrombus and other of obstructions and partial obstructions from internal body lumens or advanceable, operating heads having assemblies or abrasive materials a interventional technique. Numerous interventional been and these require of a guide wire guiding catheter prior to introduction the interventional catheter and at the target operating site. Many of these art systems incorporate vacuum aspiration systems to the ablated material from the site, thereby preventing distal embolization. Some interventional additionally or or are used in conjunction with other mechanisms, as distal filters, for removed material from circulating in the blood stream. Numerous catheters provide infusion a liquid to site of the Infused liquids may the material process, may diagnostic or therapeutic materials prior to, or an intervention. Devices for collecting material site in a body lumen or cavity, such as a blood vessel, that employ material incorporating a blade, barb
 burned in the plastic film. It iS also commoN to inCluDe dRiP irrIgatIon tubing along THe beD underneath the plastic mUlch fOr WAterINg And feRtiliziNG oF THe bEd. thIs sYsTEm Of groWinG tomatoEs has proveN to Be More energy efFIcIent per uniT of Product than tHe tRaditiOnAl sYStem oF grOwing The plaNTs on baRe ground. THuS, The tecHNique maY BE eXpecTed to become more wiDEsPRead throughout The UniTeD stATEs.
AVaiLable mechaNiCal haRVesters HAvE PROveN UnsatisfactorY for operatiON ovEr plasTiC muLCh beds. the plAsTIc fIlm becomes tOrn aNd shreddeD, causiNG cloggiNG of convEyor beLts, SepAratORs, AnD otHeR MovINg ParTS of The machiNeRy, And thE irrIGATIon tUbiNg is UsualLy damaged. For tHis ReasON, toMatoeS and oTher PrOduce Grown oN plasTiC mulch must be harVestEd manuallY. In AdDitIoN, stakES and liNes MusT be provIded for EAse Of HAND pIcking, which signifiCaNTLy IncreaseS costs. wItH sHOrtages oF fIelD labOR BecomIng cOMmOn, losses Can occUR fRoM failurE tO harveSt TomAtoEs on tIMe siNce thiS crop can ChangE Daily. Delays in hARvesting often REsULT iN OverRipEness, sunburN, insECt daMage, MOlD anD The liKe.
For ThE ReASons discussed above, tHeRe has bEen a lOng felt need foR a practicaL, EFFective mEchaNIcAL harvester head That cAn cut plantS Slightly Above The surfaCe of the beD ANd which cAn bE usEd oVer BOTh Soil and plastiC MUlch BeDs withoUt pIcking uP soIl oR daMagInG plastic fIlm and irRiGaTiOn TubIng. ReMOval of diSeAse SuCh aS atheROsclerOtic pLaquE, tHrOMbuS and othER tYPEs of ObStRuctIonS aNd parTial OBstRuctionS from inteRnaL Body LuMeNs or cavIties using advAnCeable, rotaTiNg oPeratiNG Heads havIng cutter assemblies or abRAsive maTerIals iS a weLl-establiSheD interVenTIonal tEchniqUe. NumErOus INTerveNTIoNal CaTheters havE BEen ConceIvEd anD develoPed. Most of these systEMs rEquire placemeNt oF a guIDE wIre ANd GUidInG CatHETer prior to introDuction of tHe INtErventionaL CatHeTer and pLacemenT of thE InterveNtional caTheter at tHe TargET OpeRating site. many of thEse prior aRT systEMs IncorPorAte vacUuM asPiratIon sysTEms To remOve the AbLated mAteriAl From the sIte, thereby preventing disTal embOlizaTioN. Some inteRveNTioNal cathetErs aDditionallY or AltErnatIveLY incoRporATe Or aRE used In coNJunction wITh OthER MeChanisms, sucH AS DisTal fiLteRS, for prEvenTing removed materiAL from circulatiNg in THE blOod STreaM. NUmerous interveNtiOnAL CatheterS aLso provide iNfusion oF a LIquid To the sIte of tHe interVENtIOn. InfuSed lIquIds may assIst In THe materIaL rEMoval pRoceSs, Or may bE proviDEd as DIAgnostic or therapEutic MATeriaLS prIor to, DuRing or fOLlowIng an interVention.
DeviCes for CollEctinG undesiReD materIal FrOm a site in a BOdy lumen oR caviTy, such aS a BlooD veSsel, thAt emPLOy matEriaL eXciSion devicES InCOrPoRAtiNg a bLade, bArB
 burned in the plastic fil m. It is a lso c omm onto  inc lude  drip irrigati o n tu bing along the bed und ernea th thep la sticmulch f o rw a ter in gand  f e rt ilizi ngof thebed. Thissys te m of growing to matoes has  pr oven to be m ore  energ yeff i cient  pe r uni t of p r oductthan thetr a dition a l syste m of  gro wing the plants o n  b a re ground. Thu s, the  t e ch n i que  ma y be expec te d tob ecome m o re w i des p read througho ut the Unit e d S tates. 
A vai l able m echan ic a l h arvesters h aveproven un satisf a ctory f o r opera tion o ver  pl asti c  m ul chbe d s.T he  pl a sti c film b ec om es to rn a n d s hred ded , ca using  clogging ofcon veyo r  be lts,separ ator s,  andothermovin gparts of the ma chin ery, andthe  i rri ga tiont ubingisusu ally da maged.F orth i s re ason, tomatoes and  o t h er  produce  grown on  p l astic mu lc h m ustb e  harv este d  m anually.  In ad d it io n, stak es  and l in esmus t bep rovi ded fo r ease o f han d  picking, whic h  significantl y  i n c re a sescos ts. With sh orta g es o f fi e ld  la b or be comin gc om m on, losses can occu rfrom f ailur e to harvesttomatoes o n t ime sinc e th i sc rop can change  dail y. Delaysi n harves tingoften re sult in o v e rripenes s,sun bur n,i n se ct damage, mo l d  and  t he like .
F or therea son s d isc us sed above , thereha sbe en  alongf elt need  f orapra ctica l , effe ctive  mec ha ni c alharvest e rh e ad t ha tcancut  p lants  sli g htl y above  the surf ace of t he  b ed andwhich can beus ed over bo th  so il and p lastic m ulch beds without picki n g up so ilor da magi ng plasti c f ilm an d i r rigati on tub ing.Re mov a l  of d i s ea sesu ch as athe r o scl eroti cplaq ue, thr ombus and other ty p esof obstructio nsandp a rt ial ob s tru ct i ons f rom internal bo dy lumensor ca vities usi n g a dv anceabl e, rota tingo peratin g heads h aving cut te r as s e mbl ies or abr asive ma terials i s  a we l l- estab lis hed in te rve ntion al tec h niq ue. N umerou sinterv entio na l cathet ers have been conceived  and d evelo ped . Most of  th e sesystems r equi re placeme ntofa gui dew ire a nd g u id ing cathe terp rior to i n tr odu c t io n of the in t e r ven tiona l c a theter  and  placement of the interventional  cat h e ter  at theta rget operating  si te . Many ofth ese prior a rt syste ms incor porate  vacuu m aspir a t io n  syste ms t o r emove the  ab la t ed mate ri al from t he s it e, the reby p r even t i ng distal emboli zatio n .  Some int erven ti onal ca t hete rs additio nally or al ternat ivel y inc orporat eor are  us ed  in conjun c tion with  othe r mecha ni sms,  su ch asdist a l  filt ers,  f orpreventin g re m ov ed mat eria l fro mcirc ulating i n  the blo ods tream.Nu mer o u s inte r ve n t ional cath ete rs al s o  provide i n fusi o no f a l iquidto the  site o f  th einterve nti o n . Infused  liquidsm ayas sist  in thema teri al  re mo val process, or  may beprovided a s diag nos t ic o r  thera pe utic materia ls pr io r  to, du r i ngor foll o win g a n i nter ven tion . 
Devices for collectingunde sired mat erial  from  a  site in a bo dy lumen or cavity, su ch as a blood v e sse l , th ate mp lo y materia l e x cisio n de vic es i nco rpor a t inga  bla d e,  bar b
 burned_in the_plastic film. It is_also common_to_include drip_irrigation_tubing along the_bed underneath the_plastic mulch for watering_and fertilizing of_the_bed. This system of growing tomatoes has proven to be more energy efficient per_unit_of product_than_the_traditional system of growing the_plants on bare ground. Thus,_the technique_may be expected to become more widespread throughout_the_United States.
Available mechanical_harvesters have proven unsatisfactory for operation over plastic mulch_beds. The plastic film becomes torn_and shredded, causing_clogging_of_conveyor belts, separators, and_other moving parts of the machinery,_and the irrigation tubing is usually_damaged. For this reason, tomatoes and other_produce grown on plastic mulch must_be harvested manually. In addition,_stakes and_lines must be provided for_ease of hand_picking, which_significantly increases costs._With shortages of field labor becoming_common, losses can_occur from failure to harvest tomatoes_on_time since this_crop_can_change daily._Delays in harvesting_often_result in_overripeness,_sunburn, insect damage, mold and the_like.
For_the reasons discussed above, there has been_a long felt need_for_a practical, effective mechanical_harvester head that can cut_plants slightly above the surface of_the bed_and which_can be used over both soil and plastic mulch beds without_picking up soil or damaging plastic_film and irrigation tubing._Removal of_disease_such as atherosclerotic_plaque,_thrombus and_other types of obstructions and partial obstructions_from internal_body lumens or cavities using advanceable,_rotating operating heads having_cutter_assemblies or abrasive materials is a_well-established interventional technique. Numerous interventional catheters_have been conceived and developed._Most_of_these systems require placement of_a guide wire and guiding catheter_prior to introduction_of the interventional catheter and placement of_the_interventional catheter at the target operating_site._Many of these prior art systems_incorporate_vacuum_aspiration systems to remove the_ablated material from the site, thereby_preventing distal embolization. Some interventional catheters additionally or alternatively_incorporate or are_used in conjunction with other_mechanisms,_such_as distal filters, for preventing removed material from circulating in_the blood_stream. Numerous interventional_catheters also provide infusion of a liquid to the site_of the intervention. Infused liquids may assist_in the material removal process, or may be provided as diagnostic_or therapeutic materials prior to, during or following_an intervention.
Devices for collecting undesired material from_a site in a_body_lumen or cavity, such as a blood_vessel,_that_employ_material excision devices_incorporating a blade,_barb