ITBO20000310A1

ITBO20000310A1 - MEDICAL ARMCHAIR FOR DISABLED PEOPLE AND DEVICE CREATING SUCH ARMCHAIR.

Info

Publication number: ITBO20000310A1
Authority: IT
Inventors: Franco Castellini
Original assignee: Castellini Spa
Priority date: 2000-05-19
Filing date: 2000-05-19
Publication date: 2001-11-19
Also published as: IT1321274B1

Description

DESCRIZIONE DESCRIPTION

annessa a domanda di brevetto per INVENZIONE INDUSTRIALE dal titolo: attached to a patent application for INDUSTRIAL INVENTION entitled:

POLTRONA MEDICA PER DISABILI E DISPOSITIVO REALIZZANTE TALE POLTRONA. MEDICAL ARMCHAIR FOR THE DISABLED AND DEVICE REALIZING THIS ARMCHAIR.

Il presente trovato concerne una poltrona medica ed un dispositivo realizzante tale poltrona, in particolare una poltrona configurata per raccoglimento di pazienti disabili, cioè affetti da patologie che mal si adattano a sedute di carattere medico, ed odontoiatrico in particolare. Queste patologie possono essere, ad esempio, contraddistinte da tremiti o movimenti non controllabili. The present invention relates to a medical chair and a device for making this chair, in particular an armchair configured for the reception of disabled patients, that is, those suffering from pathologies that are ill-suited to medical, and in particular dental, sessions. These pathologies can be, for example, characterized by tremors or uncontrollable movements.

Attualmente, in ambito medico, risulta particolarmente rischioso, se non impossibile, effettuare sedute di trattamento sui citati pazienti disabili. In particolare, in ambito odontoiatrico, i tremiti o movimenti incontrollati non permettono al medico di mantenere, a lungo, i manipoli in prossimità del cavo orale del paziente per non aumentare i rischi di contatti, anche violenti e non voluti, tra i manipoli ed altre parti del paziente o tra paziente e medico. Tutto ciò, oltre ad essere rischioso, determina anche una scarsa qualità del lavoro compiuto dal medico. Currently, in the medical field, it is particularly risky, if not impossible, to carry out treatment sessions on the aforementioned disabled patients. In particular, in the dental field, tremors or uncontrolled movements do not allow the doctor to keep the handpieces close to the patient's oral cavity for a long time in order not to increase the risk of contacts, even violent and unwanted, between the handpieces and other parts of the patient or between patient and doctor. All this, in addition to being risky, also determines a poor quality of the work performed by the doctor.

Per cercare di ridurre i movimenti incontrollati dei pazienti disabili non esistono particolari accorgimenti tecnici, se non vincolare gli stessi alle note poltrone attraverso classici mezzi di trattenimento, quali fasce cedevoli avvolgenti gli arti ed, eventualmente, la testa: tale soluzione non rientra in cànoni di correttezza, in quanto risulta estremamente costrittiva per il paziente che potrebbe, comunque, involontariamente, procurarsi danni fisici nelle zone trattenute. To try to reduce the uncontrolled movements of disabled patients, there are no particular technical measures, other than to bind them to the well-known armchairs through classic means of restraint, such as yielding bands enveloping the limbs and, possibly, the head: this solution does not fall into canons of correctness, as it is extremely constricting for the patient who could, however, involuntarily, get physical damage in the restrained areas.

La Richiedente, sempre sensibile alle particolari necessità presenti negli studi odontoiatrici, ha ideato e realizzato una poltrona medica e un dispositivo realizzante tale poltrona, presentanti una particolare strutturazione esterna, già integrata od applicabile successivamente a poltrone già installate, con la quale sia possibile permettere una stabilizzazione di pazienti disabili in breve tempo, sfruttando le attrezzature presenti nello studio, ed adattabile a qualsiasi conformazione fisica del paziente ed a qualsiasi patologia presente nel paziente. The Applicant, always sensitive to the particular needs present in dental practices, has designed and manufactured a medical chair and a device for making this chair, having a particular external structure, already integrated or subsequently applicable to chairs already installed, with which it is possible to allow a stabilization of disabled patients in a short time, using the equipment present in the study, and adaptable to any physical conformation of the patient and to any pathology present in the patient.

Questo scopo, che meglio apparirà nel corso della presente descrizione, è sostanzialmente raggiunto da una poltrona medica per disabili comprendente delle superfici di appoggio di una seduta, di uno schienale e di un supporto per la gambe del paziente provviste di mezzi per la variazione del proprio volume interno tra una prima configurazione estrema, in cui ogni superfice presenta uno sviluppo sostanzialmente uniforme, ad una seconda configurazione estrema, in cui ogni superfice presenta una impronta corrispondente al profilo della relativa parte del corpo del paziente in appoggio, e viceversa; all’interno delle superfici sono presenti dei mezzi di stabilizzazione delle parti del corpo in appoggio. This object, which will appear more clearly in the course of the present description, is substantially achieved by a medical chair for the disabled comprising support surfaces for a seat, a backrest and a support for the patient's legs provided with means for changing the patient's own internal volume between a first extreme configuration, in which each surface has a substantially uniform development, to a second extreme configuration, in which each surface has an imprint corresponding to the profile of the relative part of the patient's body in support, and vice versa; inside the surfaces there are means for stabilizing the parts of the body in support.

Lo scopo è raggiunto, inoltre, da un dispositivo applicabile ad una poltrona medica e comprendente un corpo in pezzo unico, applicabile sulla poltrona, e presentante una camera a volume variabile per raggiungere le citate configurazioni estreme grazie ai mezzi di variazione del volume ed ai mezzi di stabilizzazione. The object is also achieved by a device applicable to a medical chair and comprising a body in a single piece, applicable on the chair, and having a variable volume chamber to reach the aforementioned extreme configurations thanks to the means for varying the volume and the means stabilization.

Le caratteristiche tecniche del trovato, secondo i suddetti scopi, sono chiaramente riscontrabili dal contenuto delle rivendicazioni sottoriportate ed i vantaggi dello stesso risulteranno maggiormente evidenti nella descrizione dettagliata che segue, fatta con riferimento ai disegni allegati, che ne rappresentano una forma di realizzazione puramente esemplificativa e non limitativa, in cui: The technical characteristics of the invention, according to the aforementioned purposes, are clearly verifiable from the content of the claims reported below and the advantages thereof will become more evident in the detailed description that follows, made with reference to the attached drawings, which represent a purely exemplary embodiment and non-limiting, in which:

la figura 1 illustra una poltrona medica per disabili, conformemente al presente trovato, in una vista frontale schematica con alcune parti asportate per meglio evidenziarne altre; Figure 1 is a schematic front view of a medical chair for the disabled, according to the present invention, with some parts removed to better highlight others;

le figure 2 e 3 illustrano una porzione della poltrona di cui a figura 1 in due diverse configurazioni estreme assumibili, le figure sono in parziali viste in sezione schematiche; Figures 2 and 3 show a portion of the chair of Figure 1 in two different extreme configurations that can be assumed, the figures are partial schematic sectional views;

la figura 4 illustra un dispositivo per disabili applicato su una poltrona medica ed in una vista prospettica; Figure 4 illustrates a device for the disabled applied to a medical chair and in a perspective view;

la figura 5 illustra una particolare del dispositivo di cui a figura 4, cioè una porzione posteriore dello stesso, in una vista pròspettica parziale; Figure 5 illustrates a detail of the device of Figure 4, ie a rear portion thereof, in a partial perspective view;

la figura 6 illustra dei mezzi intercettatori di cui è provvisto il dispositivo di cui alle figure precedenti in una parziale vista prospettica. Figure 6 illustrates the intercepting means with which the device of the preceding figures is provided in a partial perspective view.

Conformemente alle figure dei disegni allegati, e con particolare riferimento alla figura 1, la poltrona medica in oggetto, indicata nel suo complesso con 1, è particolarmente indicata per disabili affetti da patologie che mal si adattano a sedute di carattere medico {ed in particolare odontoiatrico) come, ad esempio, tremiti o movimenti non controllabili. In accordance with the figures of the attached drawings, and with particular reference to figure 1, the medical chair in question, indicated as a whole with 1, is particularly suitable for disabled people suffering from pathologies that are not suitable for medical sessions (and in particular dental ) such as, for example, tremors or uncontrollable movements.

Come osservabile nella figura 1, la poltrona illustrata è del tipo utilizzato in studi dentistici, ma la soluzione in oggetto può essere adatta anche per altri tipi di sedute mediche. As can be seen in Figure 1, the chair illustrated is of the type used in dental offices, but the solution in question can also be suitable for other types of medical sessions.

Questa poltrona comprende una seduta 2, uno schienale 3, un supporto 4 per le gambe di un paziente ed un poggiatesta 10 che risultano tra loro associati, regolabili reciprocamente in posizione relativa tramite opportune articolazioni, e supportati da un relativo basamento 5. This armchair comprises a seat 2, a backrest 3, a support 4 for the legs of a patient and a headrest 10 which are mutually associated, mutually adjustable in relative position by means of suitable joints, and supported by a relative base 5.

Sulle varie parti della poltrona 1 sono previste delle superfici 2a, 3a, 4a e 10a di appoggio, rispettivamente, della seduta 2, dello schienale 3, del supporto 4 per la gambe del paziente e del poggiatesta 10 provviste di mezzi 6 per la variazione del proprio volume interno in modo da portarsi da una prima configurazione estrema, in cui ogni superfìce 2a, 3a, 4a e 10a presenta uno sviluppo sostanzialmente uniforme (vedi anche figura 2), ad una seconda configurazione estrema, in cui ogni superfice 2a, 3a, 4a e 10a presenta almeno una impronta 7 corrispondente al profilo della relativa parte 8 del corpo del paziente in appoggio (vedi figura 3), e viceversa. Surfaces 2a, 3a, 4a and 10a are provided on the various parts of the chair 1 for supporting the seat 2, the backrest 3, the support 4 for the patient's legs and the headrest 10, respectively, provided with means 6 for changing the its internal volume so as to move from a first extreme configuration, in which each surface 2a, 3a, 4a and 10a has a substantially uniform development (see also figure 2), to a second extreme configuration, in which each surface 2a, 3a, 4a and 10a has at least one imprint 7 corresponding to the profile of the relative part 8 of the patient's body resting on it (see Figure 3), and vice versa.

All’interno di ogni superfice 2a, 3a, 4a e 10a sono, inoltre, previsti dei mezzi 9 di stabilizzazione delle parti 8 del corpo in appoggio. Inside each surface 2a, 3a, 4a and 10a there are also provided means 9 for stabilizing the parts 8 of the supporting body.

In pratica, ogni superfice 2a, 3a, 4a e 10a è composta da una camera a tenuta provvista di un relativo mezzo 11 di intercettazione esterno collegabile ad una fonte 12 di aspirazione di aria in modo da permettere il raggiungimento della citata seconda configurazione estrema. In practice, each surface 2a, 3a, 4a and 10a is composed of a sealed chamber provided with a relative external interception means 11 which can be connected to an air suction source 12 so as to allow the achievement of the aforementioned second extreme configuration.

Questa fonte 12 di aspirazione (illustrata con un blocco in figura 1 , in quanto di tipo noto) può essere di tipo indipendente ed appositamente disposta in prossimità della poltrona 1 , oppure se la poltrona 1 è abbinata ad un riunito dentale 13 (anche questo componente illustrato schematicamente, in quanto di tipo noto), il quale comprende sempre una fonte di aspirazione costituita da un condotto 14 di aspirazione di fluido, ogni citato mezzo 11 di intercettazione presente su ogni superfice 2a, 3a, 4a e 10a può essere, vantaggiosamente, collegato ad un corrispondente terminale 15 del citato condotto 14 di aspirazione di fluido. This suction source 12 (illustrated with a block in Figure 1, since it is of a known type) can be of the independent type and specially arranged in proximity to the chair 1, or if the chair 1 is combined with a dental unit 13 (this component too shown schematically, since it is of a known type), which always comprises a suction source consisting of a fluid suction duct 14, each of the aforementioned interception means 11 present on each surface 2a, 3a, 4a and 10a can advantageously be connected to a corresponding terminal 15 of the aforementioned fluid suction duct 14.

I sopra citati mezzi 11 di intercettazione possono comprendere una nota valvola, associata ad ogni camera, e collegabile manualmente alle citate fonti 12 o 14 di aspirazione in modo da permettere l’aspirazione di aria dall'interno delle medesime camere 2a, 3a, 4a e 10a e, rispettivamente, in configurazione distaccata dalla fonti 12 o 14, il ripristino della prima configurazione uniforme tramite attraverso il rientro dell'aria dall’esterno. The aforementioned interception means 11 may comprise a known valve, associated with each chamber, and manually connectable to the aforementioned suction sources 12 or 14 so as to allow the intake of air from inside the same chambers 2a, 3a, 4a and 10a and, respectively, in a configuration detached from the sources 12 or 14, the restoration of the first uniform configuration by returning the air from the outside.

Preferenzialmente, ogni valvola 11 può essere provvista di mezzi 16 di apertura e chiusura del passaggio di aria per permettere il mantenimento della configurazione raggiunta, in particolare nella seconda configurazione estrema. Preferably, each valve 11 can be provided with means 16 for opening and closing the passage of air to allow maintaining the configuration reached, in particular in the second extreme configuration.

Come chiaramente osservabile nelle figure 2 e 3, i citati mezzi 9 di stabilizzazione possono comprendere una pluralità di elementi 17 prismatici, semi rigidi ed elasticamente cedevoli, ed in particolare a conformazione cubica e realizzati in materiale resinoso - sintetico quale il noto polistirolo. As can be clearly observed in Figures 2 and 3, the aforementioned stabilization means 9 can comprise a plurality of prismatic, semi-rigid and elastically yielding elements 17, and in particular with cubic conformation and made of resinous-synthetic material such as the known polystyrene.

Questi elementi 17 sono alloggiati in ogni camera 2a, 3a, 4a e 10a e sono mobili relativamente l’uno dall’altro in modo da permettere la prima configurazione estrema, in cui gli elementi 17 risultano, sostanzialmente, uniformemente distribuiti entro le camere 2a, 3a, 4a, 10a, e, rispettivamente, la seconda configurazione estrema, in cui detti elementi 17 sono tra loro avvicinati a definire zone compatte in prossimità dell'impronta 7 ottenuta tramite l’appoggio della parte 8 del corpo del paziente: questa disposizione degli elementi prismatici 17 permette di ottenere delle semi culle avvolgenti il paziente in modo da evitare movimenti bruschi dello stesso durante la seduta, ma senza effettuare una vera e propria costrizione sullo stesso paziente. These elements 17 are housed in each chamber 2a, 3a, 4a and 10a and are movable relative to each other so as to allow the first extreme configuration, in which the elements 17 are substantially uniformly distributed within the chambers 2a, 3a, 4a, 10a, and, respectively, the second extreme configuration, in which said elements 17 are brought together to define compact zones in proximity to the impression 7 obtained by resting the part 8 of the patient's body: this arrangement of the prismatic elements 17 allows to obtain semi-cradles enveloping the patient so as to avoid sudden movements of the same during the session, but without carrying out a real constriction on the same patient.

Nelle figure da 4 a 6 è illustrato un dispositivo che, strutturalmente, segue la filosofia della poltrona 1 appena descritta, ma con lo scopo di poter essere applicato su poltrone già preesistenti in studi medici. Figures 4 to 6 show a device which, structurally, follows the philosophy of the chair 1 just described, but with the aim of being able to be applied on chairs already existing in medical offices.

Questo dispositivo comprende essenzialmente un unico corpo 18 applicabile, a copertura completa, sulle citate superfici 2a, 3a, 4a e 10a di appoggio. Sono anche previsti dei mezzi 19 per la variazione del volume interno del corpo 18 tra la citata prima e seconda configurazione estrema e viceversa, e dei mezzi 20 di stabilizzazione del corpo del paziente in appoggio agenti all’interno del corpo 18 di copertura. This device essentially comprises a single body 18 applicable, with complete coverage, on the aforementioned supporting surfaces 2a, 3a, 4a and 10a. Means 19 are also provided for varying the internal volume of the body 18 between the aforementioned first and second extreme configuration and vice versa, and means 20 for stabilizing the patient's body resting on the inside of the covering body 18.

In pratica, viene utilizzato una sorta di unico materassino 18 provvisto di una camera interna 19 unica a volume variabile e di dimensioni tali da ricoprire tutta la poltrona 1, eventualmente dotandolo di un prolungamento 18p per la copertura del poggiatesta 10 (vedi anche figura 5). In practice, a sort of single mattress 18 is used, provided with a single internal chamber 19 with variable volume and of such dimensions as to cover the entire armchair 1, possibly providing it with an extension 18p to cover the headrest 10 (see also figure 5) .

A differenza della poltrona 1 descritta più sopra, il corpo 18 è provvisto di mezzi 21 di accoppiamento, stabile e reversibile, con la poltrona 1 tramite avvolgimento parziale del perimetro esterno della poltrona 1 medesima. Unlike the chair 1 described above, the body 18 is provided with stable and reversible coupling means 21 with the chair 1 by partially wrapping the outer perimeter of the chair 1 itself.

Questi mezzi 21 di accoppiamento comprendono una fascia 25, elasticamente cedevole, associata e sviluppantesi per tutto il perimetro del corpo 18 (a conformazione ellittica) e sporgente posteriormente dallo stesso corpo 18 (vedi figura 5): in tal modo si viene a definire una zona di parziale avvolgimento stabile della poltrona 1 coperta dal medesimo corpo 18 che può stabilmente rimanere associato alla poltrona medesima. These coupling means 21 comprise an elastically yielding band 25, associated with and extending along the entire perimeter of the body 18 (with an elliptical conformation) and projecting from the rear from the same body 18 (see figure 5): in this way an area is defined of partial stable winding of the chair 1 covered by the same body 18 which can remain stably associated with the chair itself.

Strutturalmente il corpo 18 di copertura è costituito in modo analogo alle superfici della poltrona 1 sopra descritta, ovvero con un relativo mezzo 22 di intercettazione esterno collegabile ad una fonte 12 di aspirazione di aria indipendente o, se abbinato al citato riunito dentale 13, ai citato terminale 15 dei condotto 14 di aspirazione. Structurally, the covering body 18 is constituted in a similar way to the surfaces of the chair 1 described above, or with a relative external interception means 22 which can be connected to an independent air suction source 12 or, if combined with the aforementioned dental unit 13, to the aforementioned terminal 15 of the intake duct 14.

I mezzi 22 di intercettazione (vedi figura 6) comprendono, sempre, una valvola associata al corpo 18, collegabile alle fonti 12 o 14 di aspirazione, ed è provvista di mezzi 23 di apertura e chiusura del passaggio di aria atti a permettere il mantenimento della configurazione raggiunta dal corpo 18. The interception means 22 (see figure 6) always comprise a valve associated with the body 18, connectable to the suction sources 12 or 14, and is provided with means 23 for opening and closing the passage of air suitable for allowing the maintenance of the configuration reached by the body 18.

Stesso discorso vale per i citati mezzi 20 di stabilizzazione, i quali, come nel caso delle camere precedentemente descritte, comprendono una pluralità dei citati elementi 24 prismatici alloggiati all'interno del corpo 18 per permettere le citate prima e seconda configurazione estrema illustrate nelle figure 2 e 3. The same applies to the aforementioned stabilization means 20, which, as in the case of the previously described chambers, comprise a plurality of the aforementioned prismatic elements 24 housed inside the body 18 to allow the aforementioned first and second extreme configurations illustrated in Figures 2 and 3.

II corpo 18 è provvisto, inoltre, di un ingrossamento perimetrale 26 di rinforzo e di definizione della camera ed, in particolare, della sua superfice di appoggio per il paziente. The body 18 is also provided with a perimeter enlargement 26 for reinforcing and defining the chamber and, in particular, with its support surface for the patient.

La poltrona medica ed il dispositivo appena descritti raggiungono, quindi, gli scopi prefissati grazie ad una struttura semplice e di facile utilizzo che permette, in breve tempo, di poter stabilizzare il paziente in cura senza necessariamente utilizzare elementi costrittivi che potrebbero ferire il medesimo paziente. The medical chair and the device described above therefore achieve the intended purposes thanks to a simple and easy-to-use structure which allows, in a short time, to be able to stabilize the patient under treatment without necessarily using constricting elements which could injure the same patient.

Le configurazioni assumibili dalla poltrona o dal dispositivo sono molteplici e si adattano a qualsiasi fisionomia del paziente grazie alia disposizione degli elementi prismatici che si autodispongono all’interno delle o della camera in funzione dell’impronta del paziente, man mano che la camera viene svuotata di fluido. The configurations that can be assumed by the chair or by the device are many and adapt to any physiognomy of the patient thanks to the arrangement of the prismatic elements that self-arrange themselves inside the or of the chamber according to the patient's footprint, as the chamber is emptied of fluid.

L'utilizzo di fonti di aspirazioni già presenti nello studio facilita e velocizza l’operazione di svuotamento delle camere della poltrona o del dispositivo, consentendo un rapido adattamento dei paziente e quindi dell'inizio della seduta. The use of sources of aspirations already present in the study facilitates and speeds up the emptying of the rooms of the chair or the device, allowing rapid adaptation of the patient and therefore of the beginning of the session.

II trovato così concepito è suscettibile di numerose modifiche e varianti, tutte rientranti nell’ambito del concetto inventivo. Inoltre, tutti i dettagli possono essere sostituiti da elementi tecnicamente equivalenti. The invention thus conceived is susceptible of numerous modifications and variations, all of which are within the scope of the inventive concept. Furthermore, all the details can be replaced by technically equivalent elements.

Claims

CLAIMS 1. Medical chair (1) for disabled persons of the type comprising at least a seat (2), a backrest (3) and a support (4) for the legs of a patient and associated with each other, mutually adjustable in relative position, and supported by a relative base (5), characterized in that it comprises at least the corresponding supporting surfaces (2a, 3a, 4a) for supporting said seat (2), said backrest (3) and said support (4) for the legs of said patient provided with means (6) for the variation of its internal volume between a first extreme configuration, in which each said surface (2a, 3a, 4a) has a substantially uniform development, to a second extreme configuration, in which each said surface ( 2a, 3a, 4a) has at least one imprint (7) corresponding to the profile of the relative part (8) of the body of said resting patient, and vice versa; means (9) for stabilizing said parts (8) of the resting body being provided acting within each said surface (2a, 3a, 4a).

2. Armchair according to claim 1, wherein said armchair (1) is provided with a headrest (10) independent of said backrest (3), characterized in that said surface (10a) for supporting said headrest (10) is provided of means (6) for the variation of its internal volume between said first extreme configuration and said second extreme configuration and of said stabilizing means (9) of said parts (8) of the resting body.

3. Armchair according to claims 1 and 2, characterized in that each said surface (2a, 3a, 4a, 10a) is composed of a sealed chamber provided with a relative external interception means (11) connectable to a source (12 ) of air intake so as to allow the achievement of said second extreme configuration.

4. Chair according to claims 1 and 2, wherein said chair (I) is combined with a dental unit (13) comprising a suction source consisting of a fluid suction duct (14), characterized in that each said surface (2a, 3a, 4a, 10a) is composed of a sealed chamber provided with a relative external interception means (II) which can be connected to a corresponding terminal (15) of said duct (14) for suctioning the fluid of said dental unit (13 ) and able to allow the achievement of said second extreme configuration.

5. Armchair according to claims 1 to 4, characterized in that said interception means (11) comprise a valve, associated with each said chamber (2a, 3a, 4a, 10a), connectable to said sources (12, 14) suction so as to allow the suction of air from inside the same chambers (2a, 3a, 4a, 10a) and, respectively, in a configuration detached from said sources (12, 14), the restoration of said first uniform configuration through a return of air from the outside.

6. Armchair according to claim 5, characterized in that said valve (11) is provided with means (16) for opening and closing the passage of air suitable for allowing the configuration reached to be maintained.

Armchair according to any one of the preceding claims, characterized in that said stabilizing means (9) comprise a plurality of prismatic, semi-rigid and elastically yielding elements (17) housed in each said chamber (2a, 3a, 4a, 10a) and movable relative to each other so as to allow said first extreme configuration, in which said elements (17) are substantially uniformly distributed within said chambers (2a, 3a, 4a, 10a), and, respectively, said second configuration extreme, in which said elements (17) are brought close together to define compact zones in proximity to said at least one footprint (7).

8, Device for medical chair (1) for the disabled of the type comprising at least a seat (2), a backrest (3) and a support (4) for the legs of a patient and associated with each other, mutually adjustable in relative position, and supported by a relative base (5), characterized by the fact of including: a covering body (18) applicable on at least the corresponding supporting surfaces (2a, 3a, 4a) of said seat (2), of said backrest (3) and of said support (4) for the legs of said patient; means (19) for varying the internal volume of said body (18) between a first extreme configuration, in which said body (18) has a substantially uniform development, to a second extreme configuration, in which said body (18) has at least one impression (7) corresponding to the profile (8) of the body of said patient in support, and vice versa; of the means (20) for stabilizing the patient's body resting on the inside of said covering body (18).

9. Device according to claim 8, wherein said armchair (1) is provided with a headrest (10) independent from said backrest (3), characterized in that said body (18) has a cover extension (18p) for relative surface (10a) for supporting said headrest (10).

10. Device according to claims 8 and 9, characterized in that said body (18) is in a single piece, defining a single chamber (19) with variable volume, to cover all said parts that make up said armchair (1).

11. Device according to claims 8 to 10, characterized by! the fact that said covering body (18) is provided with means (21) for stable and reversible coupling with said armchair (1) suitable for wrapping at least the outer perimeter of the armchair (1) itself.

12. Device according to claims 8 to 11, characterized in that said cover body (18) consists of a sealed chamber provided with a relative external interception means (22) connectable to a suction source (12) air so as to allow the achievement of said second extreme configuration.

13. Device according to claims 8 to 11, wherein said chair (1) is combined with a dental unit (13) comprising a suction source consisting of a fluid suction duct (14), characterized in that said body Cover (18) is composed of a sealed chamber provided with a relative external interception means (22) which can be connected to a relative terminal (15) of said duct (14) for suctioning the fluid of said dental unit (13) and adapted to allowing the achievement of said second extreme configuration.

14. Device according to claims 8 to 13, characterized in that said interception means (22) comprise a valve, associated with said body (18), connectable to said suction sources (12, 14) so as to allow outflow of air from the inside of the same body (18) and, respectively in a configuration detached from said sources (12, 14), suitable to allow the restoration of said first uniform configuration through the flow of air from the outside.

15. Device according to claim 14, characterized in that said valve (22) is provided with means (23) for opening and closing the passage of air suitable for allowing the configuration reached to be maintained.

16. Device according to any one of the preceding claims, characterized in that said stabilizing means (20) comprise a plurality of prismatic, semi-rigid and elastically yielding elements (24), housed in said body (18) and relatively movable one from the other. other so as to allow said first extreme configuration, in which said elements (24) are substantially uniformly distributed within said body (18), and, respectively, said second extreme configuration, in which said elements (24) are close to each other to define compact zones in proximity of said imprint (7).

Device according to any one of the preceding claims, characterized in that said stable and reversible coupling means (21) comprise an elastically yielding band (25) associated with and extending along the entire perimeter of said body (18) and protruding rearward from the same body (18) so as to define a stable partial wrapping area of the said armchair (1) covered by the same body (18).

18. Device according to any one of the preceding claims, characterized in that said body (18) is provided with a perimeter enlargement (26) to reinforce and define the said chamber and its support surface for said patient.

19. Armchair according to claims 1 to 7 and according to what is described and illustrated with reference to the figures of the accompanying drawings and for the aforementioned purposes.

20. Device according to claims 8 to 18 and according to what is described and illustrated with reference to the figures of the accompanying drawings and for the aforementioned purposes.